Spreadsheet: 2b2eb6b1-3348-41d9-8ddc-f88dfcafade0
Sheet: Stones

BUILDING_STONE_ID | STONE_NAME | PARENT BUILDING STONE  ID | ALTERNATIVE_NAMES | [NAME] | COLOUR | COLOUR_VARIATION | WEATHERED COLOUR | LITHOSTRATIGRAPHY | CHRONOSTRAT | STONE_LITHOLOGY | GRAIN_SIZE | [NAME] | KEY_IDENTIFICATION_FEATURES | FAILURE_WEATHERING | CONTEXT_OF_USE | LOCALITY_OF_USE | DATE_COMPILED | COMPILED_BY | MINERAL PLANNING AREA | English Heritage Atlas Area | SOURCE_OF_INFO | retrieval_date
3001 | Cobbles | 1 |  | Rounded large cobbles of a variety of colours depending on source rock often collected directly from rivers or alluvial beds | [NAME] |  | n/a | ALLUVIUM | [NAME] | BOULDERS | N/A | n/a | n/a | n/a | paving | Throughout [NAME], but from a variety of alluvial sources |  | L Horner | Devon County Council | [NAME] Atlas Area | Verbal info from [NAME], Urban Design Devon County Council | 2012-05-16 10:20:37
3002 | Saunton Sandstone | 1 |  | Light brown, ferruginous, coarse-grained Sandstone | PALE-BROWN |  | Ferruginous | PARENT DATA NOT YET ENTERED [HIERARCHY CODE] | [NAME] | SANDSTONE | COARSE GRAINED |  | Very course grained,  largely unconsolidated alluvial material | Incompetant, subject to complete failure in relatively short space of time | 1 building now in statwe of disrepair, 2 examples of being used for poor repair work | Sparce use in North Devon |  | L  Horner | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3003 | [NAME] | 1 | Sarsen Stone | Angular pebbles of chert and flint in a vuggy chalcedonic matrix.  Very hard and resistent. | YELLOW | Spotted | Yellow, brown, grey, pink | CLAY-WITH-FLINTS FORMATION | CENOZOIC | NOT ENTERED | PEBBLE GRADE |  | Angular pebbles of chert and flint in a vuggy chalcedonic matrix.  Very hard and resistent. | Building blocks usually unweathered with hackly to irregular fracture | Minor constituent of rubble walling | [NAME] with outlying occurrences at [NAME], [NAME] and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C. 2007. Building stone at the western edge of the Blackdown Hills.  Geoscience in south-west England, 11, 348-354.  Isacc, K.P., 1979. Tertiary silcretes of the Sidmouth area, East Devon.   Proceedings of the Ussher Society, 4, 341-354. | 2012-05-16 10:20:37
3004 | Flints | 1 |  | Nodules with dark grey cores and brown or white selvage are locally characteristic | BROWN | Uniform | Grey, black, yellow, brown | CLAY-WITH-FLINTS FORMATION | CENOZOIC | FLINT | VERY FINE GRAINED |  | Occurs as irregular  nodules with many re-entrants; very hard and resistent. | Building blocks usually unweathered wuth hackly to conchoidal fracture | Decorative, eg coping of walls in Sidmouth and surface finish of walling in [NAME] and Ideford | Sidmouth area; Haldon Hills; used sparingly for decorative effect elsewhere in East Devon and [NAME] |  | L Horner | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3005 | [NAME] | 1 | Granite | Coarse-grained matrix of quartz, feldspar and mica with cream-coloured megacrysts of K-feldspar. | GREY | Spotted | Brownish-grey | LUNDY ISLAND INTRUSION | PALAEOGENE | GRANITE, COARSE-GRAINED | COARSE GRAINED |  | Coarse grained granite with feldspar megacrysts | Mostly competent | Used for general building on [NAME], including the two lighthouses | [NAME] and some examples in North devon |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1979. Geology of Bideford and Lundy Island. Memoirs of the Geological Survey of Great Britain. Sheet 292 (England and Wales | 2012-05-16 10:20:37
3006 | Chalk | 1 |  |  | WHITE | Uniform |  | CHALK GROUP | [NAME] | CHALK |  |  |  |  |  |  |  | D Cameron | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3007 | Middle Chalk | 3006 |  |  | WHITE | Uniform | White, pale yellow | MIDDLE CHALK FORMATION [REMAINS IN INFORMAL USE BUT GENERALLY REGARDED AS OBSOLETE ONSHORE] | [NAME] | CHALK | FINE GRAINED |  | White fine-grained bioclastic limestone lacking oolites or obvious shelly material. May show faint nodular structure flattened in the bedding |  |  |  |  | L Horner | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3008 | [NAME] | 3006 |  | White fine-grained bioclastic limestone lacking oolites or obvious shelly material. May show faint nodular structure flattened in the bedding | WHITE | Uniform | White, pale yellow | CHALK GROUP | [NAME] | LIMESTONE, BIOCLASTIC | FINE GRAINED |  | White fine-grained bioclastic limestone lacking oolites or obvious shelly material. May show faint nodular structure flattened in the bedding | Susceptible to spalling | Widely used for ashlar walling in [NAME] and less widely in Colyton; used throughout county and beyond for external dressings especialyy of medieval churches, and for internal carving | County-wide |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3009 | Flint | 1 |  | Nodules with dark grey cores and white selvage are locally characteristic | GREY | Uniform | Grey, black, yellow, white | CHALK GROUP | [NAME] | FLINT | VERY FINE GRAINED |  | Occurs as irregular  nodules with many re-entrants; very hard and resistent. | Building blocks usually unweathered wuth hackly to conchoidal fracture | Decorative, eg coping of walls in Sidmouth and surface finish of walling in [NAME] and Ideford | Sidmouth area; Haldon Hills; used sparingly for decorative effect elsewhere in East Devon and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3010 | Greensand | 1 |  |  |  |  |  | UPPER GREENSAND FORMATION | [NAME] | SANDSTONE |  |  |  |  |  | E [NAME] and Blackdown Hills Generic Entry |  | GKL | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3011 | Green Glauconitic Sandstone | 3010 | Upper Greensand | Slabs of the stone on the west flank of the Blackdown Hills especially those used for quoins  may have sides long (up to 2m) compared to their thickness | GREEN | Uniform | Grey, green-grey, fawn, orange | UPPER GREENSAND FORMATION | [NAME] | SANDSTONE, GLAUCONITIC | MEDIUM GRAINED | Crude bedding fabric defined by orientation of minerals present in some blocks; may contain aggregates of sponge spicules; may contain layers rich in the serpulid worm Rotularia concava. | Compact, homogeneous, with disseminated green glauconite or its black alteration products.  Harder varieties have open chalcedonic cement and very rough finish on broken surfaces. | Boulders of the soft stone used for walling in Sidmouth are well rounded in many cases; | Used for roadside walls in Sidmouth.  Used more widely for rubble and ashlar walls and especially for the quoins of buildings on the west flank of the Blackdown Hills because of its tendencyto form large relaively thin slabs.. | Western flank of the Blackdown Hills; Sidmouth; lower Sid valley |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C. 2007. Building stone at the western edge of the Blackdown Hills.  Geoscience in south-west England, 11, 348-354. | 2012-05-16 10:20:37
3012 | Grey Glauconitic Sandstone | 3010 |  | Mixed  course grains of calcite and quartz set in a fine-grained carbonate matrix with parts cemented by chalcedony; plentiful disseminated glauconite. | PALE-GREY | Uniform | Grey, brown, yellow, green | UPPER GREENSAND FORMATION | [NAME] | SANDSTONE, GLAUCONITIC | COARSE GRAINED | Inhomogeneous because of variable nature of cement; rubbly. | Mixed grains of calcite and quartz set in a fine-grained carbonate matrix with parts cemented by chalcedony; plentiful disseminated glauconite. |  | Rubble walls in the source area | In a zone from [NAME] through Combpyne to Uplyme |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3013 | Upper Greensand Sandstone | 3010 | Calcareous Grit | Mixed medium grains of calcite and quartz set in a fine-grained powdery carbonate cement; development of crimson algae on north-facing walls | PALE-GREY | Uniform | Grey | UPPER GREENSAND FORMATION | [NAME] | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Crude bedding defined by variations in grain size, composition of the grains, degree of cementation and colour; glauconite grains and shell fragmnets are visible in some blocks. | Mixed grains of calcite and quartz set in a fine-grained powdery carbonate cement; development of crimson algae on north-facing walls |  | Used for all kinds of walling near the source quarries on the [NAME]-Somerset border and for the quoins and dressings of buildings otherwise made of chert  over a larger area. | Eastern half of East Devon including Seaton, Colyton, [NAME] and Tytherleigh |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3014 | [NAME] | 3010 | Upper Greensand Sandstone | Mixed  course grains of calcite and quartz; open texture with little calcareous cement; development of crimson algae on north-facing walls | BROWN | Uniform | Pale grey | UPPER GREENSAND FORMATION | [NAME] | SANDSTONE, COARSE-GRAINED | COARSE GRAINED | Crude bedding defined by colour and grain size; sparsely disseminated shell fragments and very well rounded quartz sand grains (millet seed sand); | Mixed grains of calcite and quartz; open texture with little calcareous cement; development of crimson algae on north-facing walls |  | Used for all kinds of walling, quoins and dressings around the source quarries; used for the quoins of high status builings, especially those made of chert further afield. | Western half of East [NAME] and used for the quoins of medieval churches with [NAME] dressings further afield in [NAME]; the main visible building stone of Exeter cathedral. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C. 2007. Building stone at the western edge of the Blackdown Hills.  Geoscience in south-west England, 11, 348-354. | 2012-05-16 10:20:37
3015 | Malmstone | 3010 | Malm, Upper Greensand | Mixed medium grains of calcite and quartz set in a fine-grained powdery carbonate cement; development of crimson algae on north-facing walls | PALE-GREY | Uniform | Grey | UPPER GREENSAND FORMATION | [NAME] | CALCAREOUS SANDSTONE | MEDIUM GRAINED | Crude bedding defined by variations in grain size, composition of the grains, degree of cementation and colour; glauconite grains and shell fragmnets are visible in some blocks. | Mixed grains of calcite and quartz set in a fine-grained powdery carbonate cement; development of crimson algae on north-facing walls | Generally competent | Used for all kinds of walling near the source quarries on the [NAME]-Somerset border and for the quoins and dressings of buildings otherwise made of chert  over a larger area. | Eastern half of East Devon including Seaton, Colyton, [NAME] and Tytherleigh |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3016 | [NAME] | 3010 | [NAME], Upper Greensand | Mixed medium grains of calcite and quartz set in a fine-grained powdery carbonate cement; development of crimson algae on north-facing walls | PALE-GREY | Uniform | Grey | UPPER GREENSAND FORMATION | [NAME] | CALCAREOUS SANDSTONE | MEDIUM GRAINED | Crude bedding defined by variations in grain size, composition of the grains, degree of cementation and colour; glauconite grains and shell fragmnets are visible in some blocks. | Mixed grains of calcite and quartz set in a fine-grained powdery carbonate cement; development of crimson algae on north-facing walls | Generally competent | Used for all kinds of walling near the source quarries on the [NAME]-Somerset border and for the quoins and dressings of buildings otherwise made of chert  over a larger area. | Eastern half of East Devon including Seaton, Colyton, [NAME] and Tytherleigh |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3017 | [NAME] | 3010 |  | Seldom observed dressed; the stone usually occurs  as approximately equidimensional irregular blocks up to large cobbles in size | BROWN | Banded | Brown, grey, orange, black | UPPER GREENSAND FORMATION | [NAME] | CHERT | VERY FINE GRAINED | Blocks may show relict bedding defined by trains of quartz or glauconite grains enclosed in the chalcedonic matrix.  May grade into sandstone with chalcedonic cement. May contain negative casts of bivalve shells. | Very fine-grained; very hard and resistent | Building blocks usually unweathered with irregular fracture | Rubble walling; may be replaced by more easily dressed stone in quoins and dressings of chert buildings | Blackdown and Haldon Hills |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3018 | Blue Lias | 1 | Blue Lias Limestone | Building blocks sourced from [NAME] quarries tend to be weathered fawn or [NAME] with grey cores, contrasting with those from south Somerset that tend to be more uniformly grey | GREY | Uniform | [NAME], [NAME] | BLUE LIAS FORMATION | JURASSIC | LIMESTONE | FINE GRAINED | Bedding lamination defined by variation in resistance to weathering present in some blocks; layers rich in shells lying in the bedding present in some blocks; cross-cutting calcite veins stained orange or ochre present in some blocks. | Grey or fawn fine-grained, soft [NAME]; building blocks no more than 30cm thick;  the fresh rock is dark to light grey but it weathers fawn or [NAME].  Blocks with weathered fawn outer parts and grey interiors (blue-hearted) are common. | Very susceptible to surface spalling | Used for exterior coursed rubble and ashlar walling mainly close to the source quarries in [NAME] and Somerset.  More widely used for paving, steps and fireplaces throughout [NAME] | In a zone from Membury through Axminster to Uplyme |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones.. | 2012-05-16 10:20:37
3019 | New Red Sandstone | 1 |  |  |  |  |  | SHERWOOD SANDSTONE GROUP | TRIASSIC | SANDSTONE |  |  |  |  |  |  |  | GKL | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3020 | Otter Sandstone | 3019 |  | Sandstone lacking a mud component in the matrix may have enclosing grains of coarse calcite in the cement ([NAME]). | RED | Mottled | Red, fawn, [NAME], ochre, pink | OTTER SANDSTONE FORMATION | TRIASSIC | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Faint bedding defined by grain size, proportion of fines and degree of cementation. Poor quality stone may have a nodular structure reflecting varying proportion of calcite. | Red soft medium-grained sandstone with a partly muddy calcareous cement; may be mottled in shades of red and pink depending on the proprtion of muddy and calcareous material | Soft; building blocks have rounded corners and edges | Mainly used for garden and roadside walls, often subordinate to other building stones in these structures | Sidmouth and the lower Otter valley as far north as [NAME] and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224.  Brushfield, T.N., 1894.  The churchwardens' accounts of East Budleigh.  Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 26, 335-400. | 2012-05-16 10:20:37
3021 | Otter Conglomerate | 3019 |  | Conglomeratic texture consisting of dark red rounded fragments of muddy sandstone up to 3cm across set in a lighter red medium-grained sandstone.  The fragments are softer than the matrix and may weather out. | DARK-RED | Mottled | Under some conditions weathers to very dark red, almost black | OTTER SANDSTONE FORMATION | TRIASSIC | CONGLOMERATE | PEBBLE GRADE | Bedding fabric is defined by the long axes and distribution of the muddy pebbles. | Conglomeratic texture consisting of dark red rounded fragments of muddy sandstone up to 3cm across set in a lighter red medium-grained sandstone.  The fragments are softer than the matrix and may weather out. |  | Used for all kinds of walling, and for quoins and dressings.  Preferred for building over sandstone from the Otter Sandstone because of better cementation. | Sidmouth and the lower Otter valley as far north as [NAME] and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones.. | 2012-05-16 10:20:37
3022 | Budleigh Buns | 3019 | Budleigh Salterton Pebble Beds | Only the well rounded pebbles and cobbles originally enclosed in the conglomerate are used for building in [NAME], mainly liver-coloured quartzite but includes some less well rounded cobbles of black quartz-tourmaline rock (schorl). | BROWN | Uniform |  | OTTER SANDSTONE FORMATION | TRIASSIC | QUARTZITE | PEBBLE GRADE |  | Only the well rounded pebbles and cobbles originally enclosed in the conglomerate are used for building in [NAME], mainly liver-coloured quartzite but includes some less well rounded cobbles of black quartz-tourmaline rock (schorl). |  | Constituent of rough walling of all kinds; pebbles selected for unifority of size and shape are used for the decorative finish of some walls. | In a zone trending north from Budleigh Salterton to Plymtree including the margins of the East Devon heathlands. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., 2006.  Building with stone in East Devon and adjacent parts of Dorset and Somerset.  Report and Transactions of the Devonshire Association for the Advancement of Science Literature and the Arts, 138, 185-224. | 2012-05-16 10:20:37
3023 | Exmouth Sandstone | 1 |  | Medium-grained sandstone usually mottled in shades of red, pink and fawn.  The mottling is characteristic but not everywhere present.  May be confused with the Otter Sandstone and the Dawlish sandstone. | RED | Mottled | Red, fawn, pink | EXMOUTH MUDSTONE AND SANDSTONE FORMATION | TRIASSIC | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Faint bedding defineed by colour, grain size, proportion of fines and degree of cementation. | Medium-grained sandstone usually mottled in shades of red, pink and fawn.  The mottling is characteristic but not everywhere present.  May be confused with the Otter Sandstone and the Dawlish sandstone. |  | All kinds of walling, quoins and dressings in the zone close to source quarries | Exmouth, [NAME] and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones.  Selwood, E.B., Edwards, R.A., Simpson, S., Chesher, J.A., Hamblin, R.J.O., [NAME], M.R., Riddols, B.W., and Waters, R.A., 1984.  Geology of the country around Newton Abbot: Memoir for 1:50,000 geological sheet 339, New Series.  HMSO, London. | 2012-05-16 10:20:37
3024 | Exeter Group Sandstone | 1 |  |  | RED |  |  | EXETER GROUP | PERMIAN | SANDSTONE, MEDIUM-GRAINED |  |  |  |  |  | In a zone from Dawlish and the Exe estuary, through [NAME], [NAME] and [NAME] to [NAME] and Whimple in the north and east.  Important minor building stone of central Exeter. Generic entry |  | GKL | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3025 | Red Sandstone | 3024 |  | composed of angular to well rounded translucent grains of quartz and subordinate chalky grains probably of feldspar. | RED | Uniform |  | EXETER GROUP | PERMIAN | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Bedding is defined by grain size and especially by the degree of cementation.  Holes elongated parallel to the bedding are characteristic of silica-cemented sandstone. | Tough, hard to very hard medium-grained red sandstone.   Blocks are typically homogeneous.  Some blocks are cemented by [NAME] and some by calcite.  Distinguished from Dawlish sandstone by hardness and general absence of gritty layers. | Very hard and resistent | It is the main building stone of Bishopsteignton, Ideford and Luton.  Further south mainly restricted to the quoins and dressings of medieval and early modern buildings, especially churches. | Mainly between Chudleigh, Dawlish, Shaldon and Kingsteignton. A few occurrences south of here from the coast at Brixhan to Buckfastleigh, Ashburton and Ashprington |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Bishopsteignton Parish Council, 2006.  Bishopsteignton Village Design Statement.  Teignbridge District Council.  Appleton, E., 1875.   The economic geology of [NAME].  Transactions of the Devonshire Association for the Advancement of Science, Literature and the Arts, 7, 234-246.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3026 | Red Rock | 3025 |  | Warm red with light coloured particles. Because of coarse grain size,building  blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines. | RED | Uniform |  | TORBAY BRECCIA FORMATION | PERMIAN | SANDSTONE | VERY COARSE GRAINED | Bedding is defined by the long axes of cobbles and pebbles and by variations in the proportions and size of clast rock-types. | Red breccia composed of angular pebbles and cobbles in a sandy matrix cemented by calcite; distinguished  from Heavitree breccia and its equivalents by the presence of grey limestone pebbles and cobbles. |  | .Used predominantly for rubble walling in all kinds of building but with a preponderance of garden and roadside walls; more commonly used for houses in Chelston and Paignton. | Coastal towns and villages from Dawlish south to Paignton and as far inland at Newton Abbott, [NAME] and Yalberton.  Not much used in Torquay outside the Chelston area. |  | L Horner | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3027 | Knowle Sandstone | 3025 |  | composed of angular to well rounded translucent grains of quartz and subordinate chalky grains probably of feldspar. | RED |  |  | KNOWLE SANDSTONE FORMATION | PERMIAN | SANDSTONE | MEDIUM GRAINED |  | Brick-red soft sandstone; may contain gritty or pebbly bands with rock fragments from the subjacent [NAME] succession; may contain a coarse fraction of very well rounded quartz grains. |  | Rarely used as a building stone | Used as aggregate only |  | L Horner | Devon County Council | [NAME] Atlas Area | 101111 Devonshire SourcesBGS Sources | 2012-05-16 10:20:37
3028 | Thorverton Sandstone | 3025 |  | composed of angular to well rounded translucent grains of quartz and subordinate chalky grains probably of feldspar. | RED | Uniform | Red | THORVERTON SANDSTONE FORMATION | PERMIAN | SANDSTONE | MEDIUM GRAINED |  | Brick-red soft sandstone; may contain gritty or pebbly bands with rock fragments from the subjacent [NAME] succession; may contain a coarse fraction of very well rounded quartz grains. |  | Rarely used as a building stone | Thorverton , [NAME] very limited use for building stone, generally aggreagate use |  | L Horner | Devon County Council | [NAME] Atlas Area | 101111 Devonshire SourcesBGS Sources | 2012-05-16 10:20:37
3029 | Dawlish Sandstone | 3024 |  | Medium-grained fawn sandstone composed of subangular grains of clear quartz and subordinate orange-stained quartz or feldspar. The sandstone is well sorted with few fines so that the individual grains can be easily differentiated. | PALE-BUFF | Uniform |  | DAWLISH SANDSTONE FORMATION | PERMIAN | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Bedding defined by grain size and resistance to weathering; some cross-bedding. | Medium-grained fawn sandstone composed of subangular grains of clear quartz and subordinate orange-stained quartz or feldspar. The sandstone is well sorted with few fines so that the individual grains can be easily differentiated. |  | Subsidiary to other building stones in zone of occurrence.  Widely used in central Exeter especially in medieval churches. | In a zone from Dawlish and the Exe estuary, through [NAME], [NAME] and [NAME] to [NAME] and Whimple in the north and east.  Important minor building stone of central Exeter. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3030 | Poltimore Stone | 3029 | Dawlish Sandstone | Brick-red soft sandstone; corners and edges of building blocks are rounded; may contain gritty or pebbly bands with rock fragments from the subjacent [NAME] succession; may contain a coarse fraction of very well rounded quartz grains. | RED |  |  | DAWLISH SANDSTONE FORMATION | PERMIAN | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Faint bedding defined by grain size, and resistance to weathering | Brick-red soft sandstone; corners and edges of building blocks are rounded; may contain gritty or pebbly bands with rock fragments from the subjacent [NAME] succession; may contain a coarse fraction of very well rounded quartz grains. |  | Subsidiary to other building stones in zone of occurrence but the main building stone of [NAME] and [NAME] | In a zone from Dawlish and the Exe estuary, through [NAME], [NAME] and [NAME] to [NAME] and Whimple in the north and east |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Durrance, [NAME] and Laming, D.J.C., (eds), 1982.  The Geology of Devon.  University of Exeter.   Edmunds, R.A. and Scrivener, R.G., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey Sheet 325 (England and Wales.  [NAME].  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3031 | Exeter Group Breccias | 1 |  | Because of coarse grain size, building blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines.  The spaces between may be filled with smaller block of fsandstone. | RED | Uniform |  | EXETER GROUP | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is seldom well expressed at the scale of the building block. | Red breccia composed of angular pebbles and cobbles of sandstone, hornfels, granite, porphyry and cleavage fragments of alkali feldspar in a poorly sorted sandy, silty matrix cemented by calcite. | [NAME] matrix is susceptible to weathering; blocks tend to be somewhat rounded. | Used predominantly for rubble walling in all kinds of building | Mainly in Exeter, [NAME] and the lower Clyst valley but also sparingly in adjacent parts of East Devon, Newton St Cyres and the east flank of the Haldon Hills as far south as Dawlish |  | GKL | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3032 | [NAME] | 3031 |  | Because of coarse grain size, building blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines.  The spaces between may be filled with smaller block of fsandstone. | RED | Uniform |  | HEAVITREE BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is seldom well expressed at the scale of the building block. | Red breccia composed of angular pebbles and cobbles of sandstone, hornfels, granite, porphyry and cleavage fragments of alkali feldspar in a poorly sorted sandy, silty matrix cemented by calcite. | [NAME] matrix is susceptible to weathering; blocks tend to be somewhat rounded. | Used predominantly for rubble walling in all kinds of building | Mainly in Exeter, [NAME] and the lower Clyst valley but also sparingly in adjacent parts of East Devon, Newton St Cyres and the east flank of the Haldon Hills as far south as Dawlish |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3033 | Wonford [NAME] | 3032 | Wonford Stone | Because of coarse grain size, building blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines.  The spaces between may be filled with smaller block of fsandstone. | RED | Uniform |  | HEAVITREE BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is seldom well expressed at the scale of the building block. | Red breccia composed of angular pebbles and cobbles of sandstone, hornfels, granite, porphyry and cleavage fragments of alkali feldspar in a poorly sorted sandy, silty matrix cemented by calcite. | [NAME] matrix is susceptible to weathering; blocks tend to be somewhat rounded. | Used predominantly for rubble walling in all kinds of building | Mainly in Exeter, [NAME] and the lower Clyst valley but also sparingly in adjacent parts of East Devon, Newton St Cyres and the east flank of the Haldon Hills as far south as Dawlish |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3034 | Exminster [NAME] | 3032 |  | Because of coarse grain size, building blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines.  The spaces between may be filled with smaller block of fsandstone. | RED | Uniform |  | HEAVITREE BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is seldom well expressed at the scale of the building block. | Red breccia composed of angular pebbles and cobbles of sandstone, hornfels, granite, porphyry and cleavage fragments of alkali feldspar in a poorly sorted sandy, silty matrix cemented by calcite. | [NAME] matrix is susceptible to weathering; blocks tend to be somewhat rounded. | Used predominantly for rubble walling in all kinds of building | Mainly in Exeter, [NAME] and the lower Clyst valley but also sparingly in adjacent parts of East Devon, Newton St Cyres and the east flank of the Haldon Hills as far south as Dawlish |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3035 | Newton St Cyres Breccia | 3031 |  | Because of coarse grain size, building blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines.  The spaces between may be filled with smaller block of fsandstone. | RED | Uniform |  | NEWTON ST CYRES [NAME] | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is seldom well expressed at the scale of the building block. | Red breccia composed of angular pebbles and cobbles of sandstone, hornfels, granite, porphyry and cleavage fragments of alkali feldspar in a poorly sorted sandy, silty matrix cemented by calcite. | [NAME] matrix is susceptible to weathering; blocks tend to be somewhat rounded. | Used predominantly for rubble walling in all kinds of building | Mainly in Exeter, [NAME] and the lower Clyst valley but also sparingly in adjacent parts of East Devon, Newton St Cyres and the east flank of the Haldon Hills as far south as Dawlish |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3036 | Whipton Stone | 3031 |  | Because of coarse grain size, building blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines.  The spaces between may be filled with smaller block of fsandstone. | RED | Uniform |  | WHIPTON FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is seldom well expressed at the scale of the building block. | Red breccia composed of angular pebbles and cobbles of sandstone, hornfels, granite, porphyry and cleavage fragments of alkali feldspar in a poorly sorted sandy, silty matrix cemented by calcite. | [NAME] matrix is susceptible to weathering; blocks tend to be somewhat rounded. | Used predominantly for rubble walling in all kinds of building | Mainly in Exeter, [NAME] and the lower Clyst valley but also sparingly in adjacent parts of East Devon, Newton St Cyres and the east flank of the Haldon Hills as far south as Dawlish |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3037 | [NAME] | 3031 |  | Because of coarse grain size, building blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines.  The spaces between may be filled with smaller block of fsandstone. | RED | Uniform |  | EXE BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is seldom well expressed at the scale of the building block. | Red breccia composed of angular pebbles and cobbles of sandstone, hornfels, granite, porphyry and cleavage fragments of alkali feldspar in a poorly sorted sandy, silty matrix cemented by calcite. | [NAME] matrix is susceptible to weathering; blocks tend to be somewhat rounded. | Used predominantly for rubble walling in all kinds of building | Mainly in Exeter, [NAME] and the lower Clyst valley but also sparingly in adjacent parts of East Devon, Newton St Cyres and the east flank of the Haldon Hills as far south as Dawlish |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3038 | [NAME] | 3031 |  | Because of coarse grain size,building  blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines. | RED | Uniform |  | TORBAY BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is defined by the long axes of cobbles and pebbles and by variations in the proportions and size of clast rock-types. | Red breccia composed of angular pebbles and cobbles in a sandy matrix cemented by calcite; distinguished  from Heavitree breccia and its equivalents by the presence of grey limestone pebbles and cobbles. |  | .Used predominantly for rubble walling in all kinds of building but with a preponderance of garden and roadside walls; more commonly used for houses in Chelston and Paignton. | Coastal towns and villages from Dawlish south to Paignton and as far inland at Newton Abbott, [NAME] and Yalberton.  Not much used in Torquay outside the Chelston area. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Ussher, W.A.E, 1933.  The geology of the country around Torquay.  Memoir of the Geological Survey of England and Wales;  Explanation of Sheet 350. 2nd Edition. HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3039 | [NAME] | 3038 |  | Because of coarse grain size,building  blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines. | RED | Uniform |  | TORBAY BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is defined by the long axes of cobbles and pebbles and by variations in the proportions and size of clast rock-types. | Red breccia composed of angular pebbles and cobbles in a sandy matrix cemented by calcite; distinguished  from Heavitree breccia and its equivalents by the presence of grey limestone pebbles and cobbles. |  | .Used predominantly for rubble walling in all kinds of building but with a preponderance of garden and roadside walls; more commonly used for houses in Chelston and Paignton. | Coastal towns and villages from Dawlish south to Paignton and as far inland at Newton Abbott, [NAME] and Yalberton.  Not much used in Torquay outside the Chelston area. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Ussher, W.A.E, 1933.  The geology of the country around Torquay.  Memoir of the Geological Survey of England and Wales;  Explanation of Sheet 350. 2nd Edition. HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3040 | [NAME] | 3038 |  | Because of coarse grain size,building  blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines. | RED | Uniform |  | TORBAY BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is defined by the long axes of cobbles and pebbles and by variations in the proportions and size of clast rock-types. | Red breccia composed of angular pebbles and cobbles in a sandy matrix cemented by calcite; distinguished  from Heavitree breccia and its equivalents by the presence of grey limestone pebbles and cobbles. |  | .Used predominantly for rubble walling in all kinds of building but with a preponderance of garden and roadside walls; more commonly used for houses in Chelston and Paignton. | Coastal towns and villages from Dawlish south to Paignton and as far inland at Newton Abbott, [NAME] and Yalberton.  Not much used in Torquay outside the Chelston area. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Ussher, W.A.E, 1933.  The geology of the country around Torquay.  Memoir of the Geological Survey of England and Wales;  Explanation of Sheet 350. 2nd Edition. HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3041 | [NAME] | 3038 |  | Because of coarse grain size,building  blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines. | RED | Uniform |  | TORBAY BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is defined by the long axes of cobbles and pebbles and by variations in the proportions and size of clast rock-types. | Red breccia composed of angular pebbles and cobbles in a sandy matrix cemented by calcite; distinguished  from Heavitree breccia and its equivalents by the presence of grey limestone pebbles and cobbles. |  | .Used predominantly for rubble walling in all kinds of building but with a preponderance of garden and roadside walls; more commonly used for houses in Chelston and Paignton. | Coastal towns and villages from Dawlish south to Paignton and as far inland at Newton Abbott, [NAME] and Yalberton.  Not much used in Torquay outside the Chelston area. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Ussher, W.A.E, 1933.  The geology of the country around Torquay.  Memoir of the Geological Survey of England and Wales;  Explanation of Sheet 350. 2nd Edition. HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3042 | Oddicombe [NAME] | 3038 |  | Because of coarse grain size,building  blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines. | RED | Uniform |  | ODDICOMBE BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is defined by the long axes of cobbles and pebbles and by variations in the proportions and size of clast rock-types. | Red breccia composed of angular pebbles and cobbles in a sandy matrix cemented by calcite; distinguished  from Heavitree breccia and its equivalents by the presence of grey limestone pebbles and cobbles. |  | .Used predominantly for rubble walling in all kinds of building but with a preponderance of garden and roadside walls; more commonly used for houses in Chelston and Paignton. | Coastal towns and villages from Dawlish south to Paignton and as far inland at Newton Abbott, [NAME] and Yalberton.  Not much used in Torquay outside the Chelston area. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Ussher, W.A.E, 1933.  The geology of the country around Torquay.  Memoir of the Geological Survey of England and Wales;  Explanation of Sheet 350. 2nd Edition. HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3043 | [NAME] | 3038 |  | Because of coarse grain size,building  blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines. | RED | Uniform |  | TEIGNMOUTH BRECCIA | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is defined by the long axes of cobbles and pebbles and by variations in the proportions and size of clast rock-types. | Red breccia composed of angular pebbles and cobbles in a sandy matrix cemented by calcite; distinguished  from Heavitree breccia and its equivalents by the presence of grey limestone pebbles and cobbles. |  | .Used predominantly for rubble walling in all kinds of building but with a preponderance of garden and roadside walls; more commonly used for houses in Chelston and Paignton. | Coastal towns and villages from Dawlish south to Paignton and as far inland at Newton Abbott, [NAME] and Yalberton.  Not much used in Torquay outside the Chelston area. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Ussher, W.A.E, 1933.  The geology of the country around Torquay.  Memoir of the Geological Survey of England and Wales;  Explanation of Sheet 350. 2nd Edition. HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3044 | Watcombe [NAME] | 3038 |  | Because of coarse grain size,building  blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines. | RED | Uniform |  | WATCOMBE BRECCIA FORMATION | PERMIAN | BRECCIA | VERY COARSE GRAINED | Bedding is defined by the long axes of cobbles and pebbles and by variations in the proportions and size of clast rock-types. | Red breccia composed of angular pebbles and cobbles in a sandy matrix cemented by calcite; distinguished  from Heavitree breccia and its equivalents by the presence of grey limestone pebbles and cobbles. |  | .Used predominantly for rubble walling in all kinds of building but with a preponderance of garden and roadside walls; more commonly used for houses in Chelston and Paignton. | Coastal towns and villages from Dawlish south to Paignton and as far inland at Newton Abbott, [NAME] and Yalberton.  Not much used in Torquay outside the Chelston area. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Ussher, W.A.E, 1933.  The geology of the country around Torquay.  Memoir of the Geological Survey of England and Wales;  Explanation of Sheet 350. 2nd Edition. HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3045 | Porphyry | 3031 |  | Includes banded rhyolites without obvious phenocrysts | PALE-PURPLE | Spotted | Grey, yellow, ochre, pink, maroon | EXETER GROUP | PERMIAN | BOULDERS | VERY FINE GRAINED |  | Well rounded cobbles and boulders derived from the Teignmouth breccia and its correlatives, of porphyry composed of feldspar and quartz phenocrysts in a fine-grained quartzo-feldspathic matrix. | Nearly all blocks used for building show  rounded outlines | Limited to rubble walling mainly of garden and roadside walls. | Towns and villages from Dawlish to Maidencombe and the adjacent eastern slopes of the Haldon Hills |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3046 | [NAME] | 3031 | [NAME], [NAME] and conglomerate |  | RED | Uniform | Red | HALBERTON BRECCIA FORMATION | PERMIAN | BRECCIA | PEBBLE GRADE | Bedding is defined by the long axes of pebbles and cobbles and by oriented fabric of clay minerals in the matrix | Angular pebbles and cobbles of red and black sandstone, grey limestone and abundant vein quartz in a coarse-grained sandy, muddy matrix; | Surfaces of blocks may spall | Used for walls and quoins in all kinds of building; less commonly used for the dressings round openings. | Around the villages of Uplowman-Halberton-Sampford Peverell-Burlescombe-Ayshford |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3047 | Exeter Volcanics | 1 | [NAME], [NAME], tufa |  | PURPLE | Spotted | Dark purple, dark grey, dark violet, pink | THORVERTON SANDSTONE FORMATION | PERMIAN | [NAME] | FINE GRAINED | Vesicles define flow foliation in some blocks. | Dark-coloured rock with vesicles (void) and amygdales filled with white carbonate minerals and zeolites and green chlorite and its alteration products |  | Used for all kinds of building in core area.  Mainly used for quoins and dressings of high status buildings further from source quarries. | Exeter, [NAME] and [NAME] and surrounding villages. Used for quoins and dressings in a broader zone from North Tawton and Worlington in west, Newton Abbott and Torquay in south and [NAME] and [NAME] in east. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3048 | Thorverton Stone | 3047 | Exeter Trap | Alkali basalt | PURPLE | Spotted | Purple-brown or rusty | THORVERTON SANDSTONE FORMATION | PERMIAN | [NAME] | FINE GRAINED | Some red-brown sandstone inclusions may be present | Dark coloured rock, with vesicles and amygdales in part: amygdales filled with carbonate or montmorillinoid minerals | Uniform (massive) varieties tend to weather more than vesicular | As above | Exeter and district, as above |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3049 | [NAME] | 3047 | Thorverton Stone, [NAME] | Alkali basalt | PURPLE | Spotted | Purple-brown or rusty | THORVERTON SANDSTONE FORMATION | PERMIAN | [NAME] | FINE GRAINED | Some red-brown sandstone inclusions may be present | Dark coloured rock, with vesicles and amygdales in part: amygdales filled with carbonate or montmorillinoid minerals | Uniform (massive) varieties tend to weather more than vesicular | As above | Exeter and district, as above |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3050 | Rougemont Stone | 3047 | [NAME], Exeter Trap | Alkali basalt | PURPLE | Spotted | Dark purple, dark grey, dark violet, pink | THORVERTON SANDSTONE FORMATION | PERMIAN | [NAME] | FINE GRAINED | Vesicles define flow foliation in some blocks. | Dark-coloured rock with vesicles (void) and amygdales filled with white carbonate minerals and zeolites and green chlorite and its alteration products |  | Used for all kinds of building in core area.  Mainly used for quoins and dressings of high status buildings further from source quarries. | Exeter, [NAME] and [NAME] and surrounding villages. Used for quoins and dressings in a broader zone from North Tawton and Worlington in west, Newton Abbott and Torquay in south and [NAME] and [NAME] in east. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3051 | Posbury Stone | 3047 | Exeter Trap | Alkali basalt | PURPLE | Spotted | Purple-brown or rusty | THORVERTON SANDSTONE FORMATION | PERMIAN | [NAME] | FINE GRAINED | Vesicles define flow foliation in some blocks, inclusions of red sandstone common | Dark coloured rock, with small quartz phenocrysts: vesicular and amygdaloidal in partt: amygdales filled with carbonate or montmorillinoid minerals | Some blocks weather readily and show spalling | Mostly used as dressed blocks in and around the crediton area | Crediton and district, notably in Crediton Parish church |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO. | 2012-05-16 10:20:37
3052 | [NAME] | 3047 | [NAME], Exeter Volcanics | Trachytic basalt | PURPLE | Banded |  | THORVERTON SANDSTONE FORMATION | PERMIAN | [NAME] | FINE GRAINED | Vesicles and amygdales | Sub-parallel viens of a white carbonate mineral. |  | All kinds of walling including quoins and dressings of buildings made of this stone, but especially roadside and garden  walls. | Exeter and Ide |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3053 | [NAME] | 3047 | Exeter Trap | Biotite-lamprophyre | PURPLE | Uniform | Purple-brown or rusty | THORVERTON SANDSTONE FORMATION | PERMIAN | [NAME] | FINE GRAINED |  | Dark igeous rock with abundant biotite: minette lamprophyre | Mostly competent | Buildings and walls, mostly as dressed blocks | Killerton, [NAME] and [NAME] areas |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO | 2012-05-16 10:20:37
3054 | [NAME] | 3047 | Exeter Trap | Biotite-lamprophyre | PURPLE | Uniform | Purple-brown or rusty | THORVERTON SANDSTONE FORMATION | PERMIAN | [NAME] | FINE GRAINED |  | Dark igeous rock with abundant biotite: minette lamprophyre | Mostly competent | Buildings and walls, mostly as dressed blocks | Killerton, [NAME] and [NAME] areas |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | [NAME] and Scrivener, R.C., 1999.  Geology of the country around Exeter.  Memoir of the British Geological Survey, Sheet 325 (England and Wales).  HMSO | 2012-05-16 10:20:37
3055 | Hatherleigh Stone | 1 | Lamprophyre | Lamprophyre | PALE-BUFF | Uniform | Pink | UNNAMED IGNEOUS INTRUSION, PERMIAN | PERMIAN | LAMPROPHYRE | MEDIUM GRAINED |  | Homogeneous quartzo-feldspathic rock usually encrusted with pink lichen or algae. | Some blocks exhibit very rough pitted surfaces | All kinds of walling around Hatherleigh and [NAME]; mainly for quoins and dressings elsewhere. | Around Hatherleigh and [NAME] but extending to Okehampton, Bow and Chawleigh used for quoins and dressings. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Edmonds, E.A., [NAME], [NAME], Beer, [NAME], Hawkes, J.R., [NAME] Freshney, E.C. and Fenning, P.J., 1968.  Geology of the country around Okehampton: explanation of one-inch geological sheet 324, New Series.  [NAME], [NAME].  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3056 | Hallwill Freestone | 1 | Lamprophyre | Lamprophyre | GREY | Uniform | Brownish-grey | UNNAMED IGNEOUS INTRUSION, PERMIAN | PERMIAN | LAMPROPHYRE | FINE GRAINED |  | Homogenous feldspathic rock, partly replaced by carbonate and commonly with quartz xenocrysts | Many examples susceptible to weathering with spalling and water ingress | Used in churches, farms and houses, also for railway bridges | In the Holsworthy district for churches and houses, also railway bridges |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | McKeown, M.C. and others,1973, Geology of the Country around Boscastle and Holsworth. Memoirs of the Geological Survey of Great Britain | 2012-05-16 10:20:37
3057 | Elvan | 1 | Quartz-porphyry | Very fine grained igneous rock with porphyritic crystals of quartz and K-feldspar in places: may show flow-banding | GREY | Spotted | Pale grey to brownish-grey | UNNAMED IGNEOUS INTRUSION, PERMIAN | PERMIAN | IGNEOUS, FINE-GRAINED | FINE GRAINED |  | Very fine grained igneous rock with porphyritic crystals of quartz and K-feldspar in places: may show flow-banding | Very variable response to weathering in different examples. Roborough Stone mostly competent. | Local use to south and west of Dartmoor particularly in chuches and other older buildings | Area to the south and west of Dartmoor |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Ussher W A E. 1912. The geology of the country around Ivybridge and Modbury. Memoirs of the Geological Survey.Sheet 349 (England and Wales | 2012-05-16 10:20:37
3058 | Roborough Stone | 1 |  | Very fine grained igneous rock with porphyritic crystals of quartz and K-feldspar in places: may show flow-banding | GREY | Spotted | Pale grey to brownish-grey | UNNAMED DYKE, PERMIAN | PERMIAN | IGNEOUS, FINE-GRAINED | FINE GRAINED |  | Very fine grained igneous rock with porphyritic crystals of quartz and K-feldspar in places: may show flow-banding | Very variable response to weathering in different examples. Roborough Stone mostly competent. | Local use to south and west of Dartmoor particularly in chuches and other older buildings | Area to the south and west of Dartmoor |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Ussher W A E. 1912. The geology of the country around Ivybridge and Modbury. Memoirs of the Geological Survey.Sheet 349 (England and Wales | 2012-05-16 10:20:37
3059 | Granite | 1 |  |  |  |  |  | PARENT DATA NOT YET ENTERED [HIERARCHY CODE] |  | GRANITE |  |  |  |  |  | Generic group name |  | GKL | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3060 | Dartmoor Granite | 3059 |  |  |  |  |  | DARTMOOR INTRUSION | CARBONIFEROUS to PERMIAN | GRANITE |  |  |  |  |  | Generic group name |  | GKL | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3061 | [NAME] | 3060 | Dartmoor Granite |  |  |  |  | DARTMOOR INTRUSION | CARBONIFEROUS to PERMIAN | GRANITE |  |  |  |  |  | Generic group name |  | GKL | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3062 | Merrivale Biotite Granite | 3060 | Dartmoor Granite | Biotite granite. Light grey with pinkish tinge, medium-grained. Merrivale [NAME] | GREY | Spotted | Brownish-grey | DARTMOOR INTRUSION | CARBONIFEROUS to PERMIAN | BIOTITE GRANITE | COARSE GRAINED |  | Coarse-grained matrix of quartz, feldspar and biotite with cream-coloured megacrysts of K-feldspar. Aggregates of black tourmaline common, and basic enclaves present in places | Mostly competent | Widely used in the Dartmoor Region and beyond, | Dartmoor and in a zone up to 30km from the granite outcrop |  | L Horner | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3063 | Princetown Tourmaline-biotite Granite | 3060 | Dartmoor Granite | Tourmaline-Biotite granite. Light grey with pinkish tinge, coarse-grained. Princetown Quarries | GREY | Spotted |  | DARTMOOR INTRUSION | CARBONIFEROUS to PERMIAN | TOURMALINE-BIOTITE GRANITE | COARSE GRAINED |  | Coarse-grained matrix of quartz, feldspar and biotite with cream-coloured megacrysts of K-feldspar. Aggregates of black tourmaline common, and basic enclaves present in places | Mostly competent | Widely used in the Dartmoor Region and beyond, | Dartmoor and in a zone up to 30km from the granite outcrop |  | L Horner | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3064 | [NAME] Granite | 3060 | Dartmoor Granite | Muscovite-Biotite granite. Light grey, fine-grained, with white orthoclase crystals, porphyritic. Gunnislake Quarries | GREY | Spotted |  | DARTMOOR INTRUSION | CARBONIFEROUS to PERMIAN | MUSCOVITE-BIOTITE GRANITE | FINE GRAINED | Porphyritic | Coarse grained rock of quartz, feldspar, biotite and muscovite, with sparse or no feldspar megacrysts. | Mostly competent | Widely used in the Dartmoor Region and beyond, as above. More popular than the giant granite for major building and other structures and for finer work | Dartmoor and in a zone up to 30km from the granite outcrop |  | L Horner | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3065 | Blackenstone Granite | 3060 | Dartmoor Granite | Muscovite-Biotite granite. Greenish grey, with long porphyritic orthoclase crystals. [NAME] | GREY | Spotted |  | DARTMOOR INTRUSION | CARBONIFEROUS to PERMIAN | MUSCOVITE-BIOTITE GRANITE | MEDIUM GRAINED |  | Coarse grained rock of quartz, feldspar, biotite and muscovite, with sparse or no feldspar megacrysts. | Mostly competent | Widely used in the Dartmoor Region and beyond, as above. More popular than the giant granite for major building and other structures and for finer work | Dartmoor and in a zone up to 30km from the granite outcrop |  | L Horner | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3066 | Giant Granite | 3060 | Granite, Moorstone | Biotite granite with prominent feldspar megacrysts | GREY | Spotted | Brownish-grey | DARTMOOR INTRUSION | CARBONIFEROUS to PERMIAN | BIOTITE GRANITE | COARSE GRAINED |  | Coarse-grained matrix of quartz, feldspar and biotite with cream-coloured megacrysts of K-feldspar. Aggregates of black tourmaline common, and basic enclaves present in places | Mostly competent | Widely used in the Dartmoor Region and beyond, | Dartmoor and in a zone up to 30km from the granite outcrop |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Reid, C. and others 1912, The geology of Dartmoor. Memoirs of the Geological Surve,Sheet 338,(England and Wales) London:HMSO. [NAME], A.  1926. The Dartmoor granite. Proceeding of the Geologists Association. | 2012-05-16 10:20:37
3067 | Blue Granite | 3060 | Granite, Moorstone | Granite with few or no megacrysts | GREY | Spotted | Brownish-grey | DARTMOOR INTRUSION | CARBONIFEROUS to PERMIAN | GRANITE, COARSE-GRAINED | COARSE GRAINED |  | Coarse grained rock of quartz, feldspar, biotite and muscovite, with sparse or no feldspar megacrysts. | Mostly competent | Widely used in the Dartmoor Region and beyond, as above. More popular than the giant granite for major building and other structures and for finer work | Dartmoor and in a zone up to 30km from the granite outcrop |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Reid, C. and others 1912, The geology of Dartmoor. Memoirs of the Geological Surve,Sheet 338,(England and Wales) London:HMSO. [NAME], A.  1926. The Dartmoor granite. Proceeding of the Geologists Association. | 2012-05-16 10:20:37
3068 | Dolerite | 1 | Greenstone | Rather coarse-graned for a dolerite. Pale green plagioclase crystals can usually be distinguished from darker green or black pyroxene or hornblende. | BLACK | Uniform | Ochre, brown | SOUTHWEST ENGLAND MINOR INTRUSIVE SUITE | CARBONIFEROUS | DOLERITE | MEDIUM GRAINED |  | Homogeneous black or very dark green igneous rock with characteristic ochre-weathered crusts |  | Almost exclusively used for rubble walling but an Important building material for all kinds of building in its zone of occurrence | Teign valley from Bridford and [NAME] in north to Hennock and [NAME] in south. Some usage in Newton Abbott and [NAME]. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3069 | [NAME] | 1 |  |  |  |  |  | HOLSWORTHY GROUP | CARBONIFEROUS | SANDSTONE |  |  |  |  |  |  |  | D Cameron | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3070 | Bude Sandstone | 1 | [NAME] |  |  |  |  | [NAME] | CARBONIFEROUS | SANDSTONE |  |  |  |  |  |  |  | D Cameron | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3071 | Medium- Grained Bude Sandstone | 3070 | Culm Sandstone | Parts close to the [NAME] unconformity may be partly mottled in dark red and maroon hues; cross-cutting quartz veins | GREY | Uniform | Brown, olive-brown, green, olive-green, black; ochre- and orange-stained fractures and surfaces | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Bedding visible in many blocks following crude cleavage; | Massive or crudely cleaved, feathered fracture surfaces in massive parts, otherwise irregular, hackley; small blocks | Orange- and ochre-stained fracture surfaces | Poor quality stone but the main building stone on the outcrop of the Bude Formation. | [NAME] from Tiverton in the east, bounded by the Crediton Trough on the south and the edge of Exmoor on the north. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3072 | Greencliff Beds | 3070 | [NAME] | grey siltstones and fine-grained grey and white sandstones, and occasional beds of shale with siderite nodules. | GREY | Uniform | Brown, olive-brown, green, olive-green, black; ochre- and orange-stained fractures and surfaces | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | FINE GRAINED |  | The most characteristic feature is the widespread occurrence of slump structures, these often involving tens of feet of strata. This is indistinguishable from many parts of the Bude Formation succession | Orange- and ochre-stained fracture surfaces | Local to the Bideford area but indistinguishable from the Bude Formation succession | Limited to Bideford area but indistinguishable from the Bude Formation . |  | L Horner | Devon County Council | [NAME] Atlas Area | Prentice, J E 1960. The stratigraphy of the Upper Carboniferous Rocks of the Bideford Area, North Devon. Quarterly Journal of the Geological Society  v. 116; pp. 397-405 | 2012-05-16 10:20:37
3073 | Fine-grained Bude Sandstone | 3070 | Gritstone, Culm Sandstone | Bedded sandstone, soft weathering in part, with local ripple marks and wedge bedding | BROWN | Uniform | [NAME] brown | [NAME] | CARBONIFEROUS | SANDSTONE, FINE-GRAINED | FINE GRAINED | Bedded sandstone, soft weathering in part, with local ripple marks and wedge bedding | Bedded sandstone, feldspathic in past | Mostly competent | General building stone in area of use | North and Mid-Devon, from the N Cornwall coast to the Exe Valley  north of Tiverton |  | L Horner | Devon County Council | [NAME] Atlas Area | [NAME] and others, 1979, Geology of the country around Chulmleigh, Memoir of the Geological Survey of Great Britain, Sheet 309 (England and Wales | 2012-05-16 10:20:37
3074 | [NAME] | 3073 | [NAME] | Bedded sandstone, soft weathering in part, with local ripple marks and wedge bedding | BROWN | Uniform | [NAME] brown | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | FINE GRAINED | Bedded sandstone, soft weathering in part, with local ripple marks and wedge bedding | Bedded sandstone, feldspathic in past | Mostly competent | Local to the Bideford area but indistinguishable from the Bude Formation succession | Limited to Bideford area but indistinguishable from the Bude Formation . |  | L Horner | Devon County Council | [NAME] Atlas Area | Prentice, J E 1960. The stratigraphy of the Upper Carboniferous Rocks of the Bideford Area, North Devon. Quarterly Journal of the Geological Society  v. 116; pp. 397-405 | 2012-05-16 10:20:37
3075 | [NAME] | 3073 | [NAME] | Shades of grey, green grey, blue grey and [NAME] with ochre- and orange-stained fracture surfaces | DARK-GREY | Uniform | Shades of grey, green grey, blue grey and [NAME] with ochre- and orange-stained fracture surfaces | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | VERY FINE GRAINED |  | Dark grey or blue-grey colour and slatey cleavage |  | Local to the Bideford area but indistinguishable from the Crackington Formation succession | Limited to Bideford area but very similar to the Crackington Formation |  | L Horner | Devon County Council | [NAME] Atlas Area | Prentice, J E 1960. The stratigraphy of the Upper Carboniferous Rocks of the Bideford Area, North Devon. Quarterly Journal of the Geological Society  v. 116; pp. 397-405 | 2012-05-16 10:20:37
3076 | Dark Red Sandstone | 3069 | Culm Sandstone | Homogeneous, maroon pigmentation distinguishes from Permian sandstones; green reduction zones along joints, onion-skin weathering | PURPLE | Uniform |  | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Faint bedding is observed in some blocks. | Homogeneous, maroon pigmentation distinguishes from Permian sandstones; green reduction zones along joints, onion-skin weathering |  | An important building stone near the Permian unconformity and the main stone of Sandford village.  Used for quoins and dressings of medieval churches in northwest and southeast of distribution. | Mainly around Crediton, Tiverton and Collumpton but extenting to a boader zone bounded by Chawleigh, [NAME], [NAME] and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Chalk, E.S., 1934.  The History of Kentisbeare and Blackborough. Parochial Histories of Devonshire, No.3. Devonshire Association for the Advancememt of Science, Literature and the Arts. . [NAME], B and Pevsner, [NAME], 1989.  The Buildings of England :[NAME].  2nd Edition,  Penguin Books, London.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3077 | Hensley Stone | 3069 | Dark Red Sandstone | Homogeneous, maroon pigmentation distinguishes from Permian sandstones; green reduction zones along joints, onion-skin weathering | PURPLE | Uniform |  | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Faint bedding is observed in some blocks. | Homogeneous, maroon pigmentation distinguishes from Permian sandstones; green reduction zones along joints, onion-skin weathering |  | An important building stone near the Permian unconformity and the main stone of Sandford village.  Used for quoins and dressings of medieval churches in northwest and southeast of distribution. | Mainly around Crediton, Tiverton and Collumpton but extenting to a boader zone bounded by Chawleigh, [NAME], [NAME] and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Chalk, E.S., 1934.  The History of Kentisbeare and Blackborough. Parochial Histories of Devonshire, No.3. Devonshire Association for the Advancememt of Science, Literature and the Arts. . [NAME], B and Pevsner, [NAME], 1989.  The Buildings of England :[NAME].  2nd Edition,  Penguin Books, London.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3078 | Brownstone | 3069 | Dark Red Sandstone | Homogeneous, maroon pigmentation distinguishes from Permian sandstones; green reduction zones along joints, onion-skin weathering | PURPLE | Uniform |  | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Faint bedding is observed in some blocks. | Homogeneous, maroon pigmentation distinguishes from Permian sandstones; green reduction zones along joints, onion-skin weathering |  | An important building stone near the Permian unconformity and the main stone of Sandford village.  Used for quoins and dressings of medieval churches in northwest and southeast of distribution. | Mainly around Crediton, Tiverton and Collumpton but extenting to a boader zone bounded by Chawleigh, [NAME], [NAME] and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Chalk, E.S., 1934.  The History of Kentisbeare and Blackborough. Parochial Histories of Devonshire, No.3. Devonshire Association for the Advancememt of Science, Literature and the Arts. . [NAME], B and Pevsner, [NAME], 1989.  The Buildings of England :[NAME].  2nd Edition,  Penguin Books, London.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3079 | Cinnamon-coloured Sandstone | 3069 | Dark Red Sandstone | Homogeneous, maroon pigmentation distinguishes from Permian sandstones; green reduction zones along joints, onion-skin weathering | PURPLE | Uniform |  | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Faint bedding is observed in some blocks. | Homogeneous, maroon pigmentation distinguishes from Permian sandstones; green reduction zones along joints, onion-skin weathering |  | An important building stone near the Permian unconformity and the main stone of Sandford village.  Used for quoins and dressings of medieval churches in northwest and southeast of distribution. | Mainly around Crediton, Tiverton and Collumpton but extenting to a boader zone bounded by Chawleigh, [NAME], [NAME] and [NAME] |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | Chalk, E.S., 1934.  The History of Kentisbeare and Blackborough. Parochial Histories of Devonshire, No.3. Devonshire Association for the Advancememt of Science, Literature and the Arts. . [NAME], B and Pevsner, [NAME], 1989.  The Buildings of England :[NAME].  2nd Edition,  Penguin Books, London.  [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3080 | [NAME] | 3069 | Culm  Sandstone |  |  |  |  | [NAME] | CARBONIFEROUS | SANDSTONE |  |  |  |  |  |  |  | D Cameron | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3081 | Cornborough Sandstone | 3080 | Culm Sandstone | Massive feldspathic sandstones with large-scale cross-stratification and wedge bedding | GREY | Uniform | Brownish-grey | [NAME] | CARBONIFEROUS | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Flaggy in part | Rather soft-weathering feldspathic sandstone, with a sugary texture | Soft-weathering in part | General building stone in are of use | Bideford area and eastwards inland |  | R C Scrivener | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3082 | Crackington Sandstone | 3069 | Gritstone, Culm Sandstone | Bedded sandstones with prominent sole markings, mostly grey, weathering rusty brown Cross-cutting quartz veins Orange- and ochre-stained fracture surfaces | GREY | Uniform | Brown, olive-brown, green, olive-green, black, ochre- and orange-stained fractures and surfaces | CRACKINGTON FORMATION | CARBONIFEROUS | SANDSTONE, FINE-GRAINED | FINE GRAINED | Bedding visible in many blocks following crude cleavage with fining upwards in individual beds; sole marking also common; quartz veins sometoimes present | Hard well-bedded greywacke [NAME] grained on average than [NAME] sandstones. Massive or crudely cleaved, feathered fracture surfaces in massive parts, otherwise irregular, hackley; small blocks | Mostly competent | Poor quality stone, but general building (mainly walling stone) in area of use; rounded oblate pebbles set on edge widely used for the paving of churchyard paths and older sidewalks. | In a  zone along the northern margin of the Dartmoor granite east of Okehampton, along the line of the A30 from [NAME] to Exeter; western and northern parts of [NAME] and adjacent villages and in a zone in North Devon south- and eastwards from Hartland Point, through Bideford to the south of Barnstaple and eastwards to the Exe Valley |  | L Horner | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. Edmonds E.A and others, 1979. Geology of Bideford and Lundy Island. Memoirs of the Geological Survey of Great Britain. Sheet 292 (England and Wales); Site visits by L Horner | 2012-05-16 10:20:37
3083 | Crackington Slate | 1 | Culm Measures Slate | Shades of grey, green grey, blue grey and [NAME] with ochre- and orange-stained fracture surfaces | DARK-GREY | Uniform | Shades of grey, green grey, blue grey and [NAME] with ochre- and orange-stained fracture surfaces | ASHTON MUDSTONE MEMBER | CARBONIFEROUS | SLATE | VERY FINE GRAINED |  | Dark grey or blue-grey colour and slatey cleavage |  | Mainly resticted to garden and roadside walls but used also for houses in Okehampton, Sticklepath, South Zeal and South Tawton | In a 10km-wide zone along the northern margin of the Dartmoor granite east of Okehampton, along the line of the A30 from [NAME] to Exeter |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3084 | Bampton Limestone | 1 |  | Blocks quite commonly laid with bedding parallel to the face of the wall. | GREY | Banded | Cream, fawn, [NAME], orange, red, purple, ochre | BAMPTON LIMESTONE FORMATION | CARBONIFEROUS | LIMESTONE | MEDIUM GRAINED |  | Regular, strong sedimentary banding as Westleigh limestone but includes shaley as well as chert bands and shows wide range of weathered colours | Variegated weathered colours; typically as slabs seldom more than 15cm thick | Rubble walling of nearly all buildings in zone of occurrence other than [NAME] | Around Hockworthy, Huntsham, Bampton and Tiverton |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3085 | Teign Chert | 1 |  | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | TEIGN CHERT FORMATION | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Teign valley from Dunsford to Cannonteign Barton; area bounded by [NAME], Ilsington and Newton Abbott |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3086 | [NAME] | 3085 | Teign Chert | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | TEIGN CHERT FORMATION | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Teign valley from Dunsford to Cannonteign Barton; area bounded by [NAME], Ilsington and Newton Abbott |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3087 | [NAME] | 3085 | Teign Chert | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | TEIGN CHERT FORMATION | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Present in thin seams from Drewsteignton to Haytor Down |  | L Horner | Devon County Council | [NAME] Atlas Area | Durrance, [NAME] and Laming, D.J.C., (eds), 1982.  The Geology of Devon.  University of Exeter. | 2012-05-16 10:20:37
3088 | Mount Ararat Chert | 3085 | Teign Chert | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | TEIGN CHERT FORMATION | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Present in thin seams from Drewsteignton to Haytor Down |  | L Horner | Devon County Council | [NAME] Atlas Area | Durrance, [NAME] and Laming, D.J.C., (eds), 1982.  The Geology of Devon.  University of Exeter. | 2012-05-16 10:20:37
3089 | [NAME] | 3085 | Teign Chert | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | TEIGN CHERT FORMATION | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Present in thin seams from Drewsteignton to Haytor Down |  | L Horner | Devon County Council | [NAME] Atlas Area | Durrance, [NAME] and Laming, D.J.C., (eds), 1982.  The Geology of Devon.  University of Exeter. | 2012-05-16 10:20:37
3090 | Barracados Chert | 3085 | Teign Chert | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | TEIGN CHERT FORMATION | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Present in thin seams from Drewsteignton to Haytor Down |  | L Horner | Devon County Council | [NAME] Atlas Area | Durrance, [NAME] and Laming, D.J.C., (eds), 1982.  The Geology of Devon.  University of Exeter. | 2012-05-16 10:20:37
3091 | [NAME] | 3085 | Teign Chert | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | TEIGN CHERT FORMATION | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Present in thin seams from Drewsteignton to Haytor Down |  | L Horner | Devon County Council | [NAME] Atlas Area | Durrance, [NAME] and Laming, D.J.C., (eds), 1982.  The Geology of Devon.  University of Exeter. | 2012-05-16 10:20:37
3092 | [NAME] | 3085 |  | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | [NAME] | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Present in thin seams from Drewsteignton to Haytor Down |  | L Horner | Devon County Council | [NAME] Atlas Area | Durrance, [NAME] and Laming, D.J.C., (eds), 1982.  The Geology of Devon.  University of Exeter. | 2012-05-16 10:20:37
3093 | Doddiscombe Formation | 3085 |  | Includes pink, [NAME], toffee-coloured, red or yellow chert; contains discoloured veins that cut across the banding; includes black siliceous shale and grey limestone associated with chert | BLACK | Banded |  | DODDISCOMBE FORMATION | CARBONIFEROUS | CHERT | VERY FINE GRAINED |  | Very fine-grained chert, in many blocks banded, with shiny surface finish and closely spaced splintery fractures |  | Minor building stone of all kinds of structure | Present in thin seams from Drewsteignton to Haytor Down |  | L Horner | Devon County Council | [NAME] Atlas Area | Durrance, [NAME] and Laming, D.J.C., (eds), 1982.  The Geology of Devon.  University of Exeter. | 2012-05-16 10:20:37
3094 | [NAME] | 1 |  | Owing to the presence of bedding and cleavage together with inhomogeneity of the original rock the quarried stone is likely be rather ragged in shape. | DARK-GREY | Uniform | Brownish grey | [NAME] | CARBONIFEROUS | MUDSTONE AND SHALE | FINE GRAINED | Sedimentary structures indicate soft sediment deformation with development of a slump breccia. On this there is the later imprint of tectonic shearing and metamorphism | Distinguished from similar shales in area by micaceous nature and occurrence of lenses of grewacke sandstone, impure limestones, cherts and bands of volcaniclastics | Presence of cleavage interacting with bedding probably makes this stone susceptible to frost action | Could be used in rough rubble constructed house walls where covered by rendering | Probably limited use in the area stretching between Lydford, North Brentor and Chillaton |  | E C Freshney | Devon County Council | [NAME] Atlas Area | BRITISH GEOLOGICAL SURVEY. 1993. Tavistock. England and [NAME] 337. Solid and Drift Geology. 1:50 000. Provisional Series. (Keyworth, British Geological Survey.) [NAME], KP. 1981. The Hercynian geology of [NAME], north-west Dartmoor, and its regional significance. Proceedings of the Ussher Society, 5, 147-152. | 2012-05-16 10:20:37
3095 | [NAME] | 1 | [NAME] | In spite of the complex nature of the original rock and the presence of shearing and cleavage, it can be dressed as a freestone | PALE-GREEN | Mottled | Brown and orange brown | MILTON ABBOT FORMATION | CARBONIFEROUS | IGNEOUS, MEDIUM-GRAINED | FINE GRAINED | Commonly vesicular, vesicles usually void. Besides lavas there are volcanic breccias containing clasts of lava produced by explosive disruption of sub aqueous lava flows | Rough texture due to commonly vesicular nature of the volcanic rock. The green colouration can be quite stong. Heavily sheared with rough cleavage | A fairly compact stone which appears to show considerable resistance to weathering | Used in walls of large buildings without rendering and but not used for quoins and window reveals | Extensive use in Tavistock area, in Plymouth, around [NAME], North Brent Tor and as far west as [NAME] |  | E C Freshney | Devon County Council | [NAME] Atlas Area | BRITISH GEOLOGICAL SURVEY. 1993. Tavistock. England and [NAME] 337. Solid and Drift Geology. 1:50 000. Provisional Series. (Keyworth, British Geological Survey.) [NAME], C. and others. 1911. Geology of the country around Tavistock and [NAME]. Memoirs of the Geological Survey of Great Britain,(Sheet 337, England and Wales). PAGE, K.N. 2004. Geodiversity Audit and interpretative review of the mining districts of the Tamar and Tavy rivers in West Devon: Part 1 – Geodiversity Audit and selection of County Geological Sites. Report to Devon County Council, 92pp www.devon.gov.uk/geo-brent-tor.pdf | 2012-05-16 10:20:37
3096 | [NAME] | 1 |  | Varies from pale to very dark grey; may have speckled appearance through mixture of dark and light grey grains | GREY | Banded | Purple, brown, fawn | WESTLEIGH LIMESTONE FORMATION | CARBONIFEROUS | LIMESTONE | MEDIUM GRAINED |  | Regular sedimentay banding and lamination distinguishes from limestone from [NAME] and Plymouth; bands and lenses of black chert with cross-cutting fractures |  | Mainly rubble walling including quoins and dressings of all kinds of building | In a zone from the Somerset border at Burlescombe along the line of rail to [NAME]; middle Culm valley and Tiverton. |  | M.C.Barr | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones. | 2012-05-16 10:20:37
3097 | [NAME] | 1 |  | Includes olive-brown lavas and tuffs, some with vesicles, some with broken feldspar phenocrysts | GREEN | Uniform | Brown, black, ochre | GURRINGTON SLATE FORMATION | DEVONIAN to CARBONIFEROUS | SLATE | FINE GRAINED |  | Typically bright green and purple slate, sometimes mottled in some cases poorly foliated, accompanied by deformed [NAME] and tuff |  | Rubble walling of all kinds of building | Between Ashburton, Buckfastleigh and Torbryan, but may well have been sold out of the county (see [NAME], 1851) |  | [NAME] edited [NAME] | Devon County Council | [NAME] Atlas Area | [NAME], M.W.C., Unpublished.  GIS database of [NAME], [NAME] and Dorset building stones.  [NAME], E B. and others, 1984, Geology of the country around Newton Abbot. Memoir of the Geological Survey of Great Britain, (Sheet 339, England and Wales White, W. 1851. History, Gazetteer & Directory of Devonshire. | 2012-05-16 10:20:37
3098 | Saltash Slate | 1 |  | Owing to the presence of bedding and cleavage together with inhomogeneity of the original rock the quarried stone is likely be rather ragged in shape. | DARK-GREY | Uniform | Yellowish brown | SALTASH FORMATION | DEVONIAN to CARBONIFEROUS | SLATE | FINE GRAINED | Sedimentary lamination affected by later cleavage development. | Grey to dark grey silty mudstone with laminae and thin beds of siltstone. Occasional thin beds of fine-grained sandstone and limestone laminae. Volcanic rocks both lavas and volcanic breccias are prominent in the formation | Because of the presence sedimentary and structural discontinuities the stone will be susceptible mechanical and frost damage | Could be used in rough rubble constructed house walls where covered by rendering | The Saltash Formation is known to crop out east of Plymouth in the Plympton St Maurice area and is probably used in that area for building stone. To the immediate east of this the formation is not separated out from the Middle to Upper Devonian beds, but probably has been utilised in that area. Farther east the formation may be cut out by tectonic features but it reappears represented by the [NAME] Member of the Nordon Formation in a small outcrop stretching from Dittisham towards Brixham. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Leveridge, B E, and others. 2002. Geology of the Plymouth and southeast Cornwall area. Memoirs of the Geological Survey of Great Britain, (Sheet 348, England and Wales).   [NAME], B E, and others. 2003. Geology of the Torquay district - a brief explanation of the geological map. Sheet explanation of the Geological Survey of Great Britain. (Sheet 350 , England and Wales). | 2012-05-16 10:20:37
3099 | Greenstone | 1 | Dolerite | A dark coloured basic igneous rock made up of albite feldspar, augite and hornblende arranged in an ophitic texture. | DARK-GREEN | Uniform | Orange brown | UNNAMED IGNEOUS INTRUSION, DEVONIAN TO CARBONIFEROUS | DEVONIAN to CARBONIFEROUS | DOLERITE | MEDIUM GRAINED | Onion scale weathering characteristic of the upper weathered material of the dolerites frequently leaves harder cores which weather out as 'boulders'. These have been used in the past in walling. | Dark green basic igneous rock made up of albite feldspar and augite and some hornblende with an ophitic texture. The mineralogy and texture may be partly destroyed by metamorphim with the mafic minerals converted to chloritous material. Some of the dolerites are porphyritic with phenocrysts of feldspar | Intact rock below the weathering zone is hard and strong but difficult to work as a freestone. The weathered material forms a dark brown coarse 'earth' | Used in rubble walls both field walls and house wall. Frequently used as a stone base for a cob built wall | Used extensively in the Teign Valley area and in the area to the north-east and north-west of Tavistock |  | E C Freshney | Devon County Council | [NAME] Atlas Area | BRITISH GEOLOGICAL SURVEY. 1993. Tavistock. England and [NAME] 337. Solid and Drift Geology. 1:50 000. Provisional Series. (Keyworth, British Geological Survey.) [NAME], C., and others. 1911. Geology of the country around Tavistock and [NAME]. Memoirs of the Geological Survey of Great Britain, (Sheet 337, England and Wales). [NAME], E B. and others, 1984, Geology of the country around Newton Abbot. Memoir of the Geological Survey of Great Britain, (Sheet 339, England and Wales) Geodiversity Audit of Active Aggregate Quarries in [NAME]. http://www.devon.gov.uk/index/environmentplanning/natural_environment/geology/geodiversity-2/audit_of_active_aggregate_quarries.htm | 2012-05-16 10:20:37
3101 | Trehills Sandstone | 1 |  | Medium- to fine-grained sandstone interbedded with mudstone and micaceous laminated siltstone | GREEN | Uniform | Yellowish grey | TREHILLS SANDSTONE MEMBER | DEVONIAN | SANDSTONE | FINE GRAINED | Inter bedded sandstones, mudstones and micaceous siltstones. The sandstones show both parallel and ripple lamination | Pale green and grey-green slaty silty mudstone with minor thin fine-grained sandstone beds and lenses. Medium- to fine-grained sandstone interbedded with mudstone and laminated siltstone | Internal lamination within sandstone beds may lead to weakness. Mudstones and siltstones susceptible to weathering | Sandstones suitable for walling, but probably needs rendering. Associated mudstone could be used for rubble walls | Crops out as a narrow band to the south of Bere Ferrers and eastwards across the Tavy to the north of Tamerton Foliot. Could have been used locally in that area. Was quarried at Trehills Plantation |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Leveridge, B E.  and others 2002. Geology of the Plymouth and southeast Cornwall area. Memoirs of the Geological Survey of Great Britain, (Sheet 348, England and Wales). | 2012-05-16 10:20:37
3102 | Upper Devonian Slates | 1 |  | Greyish green to greenish grey silty mudstone with a  strong slatey cleavage | GREEN | Uniform | yellowish grey | UPPER DEVONIAN SLATES | DEVONIAN | SLATE | FINE GRAINED | In most the area the cleavage forms the dominant parting plane allowing the slate to be spit into slabs | In the west the formation consists mainly of greyish green to greenish grey smooth slates with a greenish chloritic sheen to cleavage sufaces. There is some laminated siltstone and lenses of fine-grained sandstone. In the east around Buckfastleigh the upper part is a greenish grey slate but the lower part contains purple and green mottled slates. | Fairly strong except where weathered into shaly debris | Used mainly for contructing walls both in buildings and outside. Some may also have been used as roofing slate | The Upper Devonian Slates has been used for building in the area to the north of Plympton and around Buckfastleigh. North west of Plympton to the south west of Tavistock it has been renamed the Tavy Formation, and in the area to the north east of Buckfastleigh it has been subdivided into the Tavy Formation and the Gurrington Slate Formation. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | BRITISH GEOLOGICAL SURVEY. 1912. Ivybridge. England and [NAME]. Solid and Drift Geology. 1:50 000. (Keyworth, British Geological Survey.) Ussher, W A E. 1912 Geology of the country around Ivybridge and Modbury. Memoirs of the Geological Survey of Great Britain. (Sheet 349, England and Wales) | 2012-05-16 10:20:37
3103 | [NAME] | 3102 |  | Greyish green to greenish grey silty mudstone with a  strong slatey cleavage | GREEN | Uniform | Yellowish grey | TAVY FORMATION | DEVONIAN | SLATE | FINE GRAINED | In most the area the cleavage forms the dominant parting plane allowing the slate to be spit into slabs | Smooth greyish green slate with lustrous cleavage surfaces | In most the area the cleavage forms the dominant parting plane allowing the slate to be spit into slabs | Used mainly for contructing walls both in buildings and outside. Some may also have been used as roofing slate | Area to the east of the River Tamar between [NAME] and Tavistock. May have been used in Plymouth. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Reid, C., and others. 1911. Geology of the country around Tavistock and [NAME]. Memoirs of the Geological Survey of Great Britain, (Sheet 337, England and Wales). [NAME], B E.  and others 2002. Geology of the Plymouth and southeast Cornwall area. Memoirs of the Geological Survey of Great Britain, (Sheet 348, England and Wales). | 2012-05-16 10:20:37
3104 | Kate Brook Slate | 3103 |  | Greyish green to greenish grey silty mudstone with a  strong slatey cleavage | GREEN | Uniform | Yellowish grey | KATE BROOK SLATE [OBSOLETE NAME AND CODE: SEE TVY] | DEVONIAN | SLATE | FINE GRAINED | In most the area the cleavage forms the dominant parting plane allowing the slate to be spit into slabs | Smooth greyish green slate with lustrous cleavage surfaces | In most the area the cleavage forms the dominant parting plane allowing the slate to be spit into slabs | Used mainly for contructing walls both in buildings and outside. Some may also have been used as roofing slate | North and north east of Buckfastleigh and north east of Ashburton. Small outcrops at Coldeast and east of Chudleigh |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Selwood, E B. and others, 1984, Geology of the country around Newton Abbot. Memoirs of the Geological Survey of Great Britain, (Sheet 339, England and Wales) | 2012-05-16 10:20:37
3105 | [NAME] | 3102 |  | Cream, grey and purple slates and siltstones with scattered fine-grained sandstones, some up to 2m thick in the lower part of the formation | GREEN | Banded | Grey and purplish grey | UPCOTT SLATES FORMATION | DEVONIAN | SLATE | FINE GRAINED | Mudstone well cleaved and muddy tops of sandstone show some development of cleavage. | Slatess with a strong colour banding in cream, grey, red and purple with some interbedded sandstones. | Sandstones fairly hard and strong except wher muddy. Slates more susceptible to weathering | Probably only used very locally for construction of rubble walls. | Narrow outcrop from the north side of Baggy Point eastwards to the Molland area. No large quarries appaer to have been opened in the past but it is likely that the rocks of this formation were used for local low status buildings |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Edmonds, E A. and others. 1979. Geology of Bideford and Lundy Island. Memoirs of the Geological Survey of Great Britain. (Sheets 292 with 275,276, 291 and parts of 308, England and Wales) Edmonds, E.A., and others. 1985. Geology of the Country around Ilfracombe and Barnstaple. Memoirs of the  Geological Survey of Great Britain. (Sheet 293, England and Wales) | 2012-05-16 10:20:37
3106 | Whitelady Formation | 3102 |  | Greenish-grey mudstone with thin quartzite and limestone beds and nodular cephalopod limestone. Heavily cleaved | GREY | Uniform | Yellowish grey | WHITELADY [NAME] | DEVONIAN | SLATE | FINE GRAINED |  | Greenish-grey slate with thin quartzite and limestone beds and nodular  limestone. |  |  | Extremely limited exposure within [NAME]. Very unlikely to have been used in building |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Isaac, K P. 1981. The Hercynian geology of [NAME], north-west Dartmoor, and its regional significance. Proceedings of the Ussher Society,Vol. 5, pp.147-152. | 2012-05-16 10:20:37
3107 | [NAME] | 3102 |  | Dark green-grey, black and green mudstones with variably abundant siltstone laminae and scattered thin- to medium-bedded sandstones, limestone nodules and units of nodular cephalopod limestone. [NAME] and thin tuff beds are sporadically present. | DARK-GREY | Uniform | Yellowish grey | [NAME] | DEVONIAN | SLATE | FINE GRAINED | Strong slaty cleavage | Dark coloured with siltstone laminae.Thin limestone lenses which weather out to orange brow ferruginous material. | Fairly weak, susceptible to weathering | Possibly in rubble walling | Very limited outcrop south west and east of Lewtrenchard towards Meldon. Possible very local use |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Mc Keown, M C. and others. 1973. Geology of the country around Boscastle and Holsworthy. Memoirs of the Geological Survey of Great Britain. (Sheet 323, England and Wales). | 2012-05-16 10:20:37
3108 | Middle Devonian Limestone | 1 | Torquay & Plymouth Limestone |  |  |  |  | MIDDLE DEVONIAN LIMESTONE | DEVONIAN | LIMESTONE |  |  |  |  |  |  |  | D Cameron | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3109 | Ashburton Limestone | 3108 | Ashburton Marble | contain fragments with tabulate and rugose corals and stromatoporoids | DARK-GREY | Mottled | Ochre | CHERCOMBE BRIDGE LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Dark grey sometimes black,  rich with stromatoporoid fossils and rugose coral  with red and white veining (haematite and calcite) | Mostly competent | Mainly decorative as polished stone | Used locally in the Ashburton are but known and used much more widely as a decorative polished stone either for internal use or as a facing or paving stone in, on or around  prestigious buildings. |  | L Horner | Devon County Council | [NAME] Atlas Area | Shining Stones Britain's native 'marbles [NAME] and [NAME] | 2012-05-16 10:20:37
3110 | Chercombe Bridge Limestone | 3109 | Ashburton Limestone | contain fragments with tabulate and rugose corals and stromatoporoids | DARK-GREY | Mottled | Ochre | CHERCOMBE BRIDGE LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Dark grey sometimes black,  rich with stromatoporoid fossils and rugose coral  with red and white veining (haematite and calcite) | Mostly competent | Mainly decorative as polished stone | Used locally in the Ashburton are but known and used much more widely as a decorative polished stone either for internal use or as a facing or paving stone in, on or around  prestigious buildings. |  | L Horner | Devon County Council | [NAME] Atlas Area | Shining Stones Britain's native 'marbles [NAME] and [NAME] | 2012-05-16 10:20:37
3111 | Torquay & Plymouth Limestones | 3108 | Middle Devonian Limestone |  |  |  |  | TORQUAY AND PLYMOUTH LIMESTONES [OBSOLETE NAME AND CODE] | DEVONIAN | LIMESTONE |  |  |  |  |  |  |  | D Cameron | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3112 | [NAME] | 3111 |  | [NAME] with pink veins, crystalline, admits of a good polish | BROWN |  |  | TORQUAY LIMESTONE FORMATION | DEVONIAN | LIMESTONE |  | Veined, pink |  |  |  |  |  | D Cameron | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3113 | [NAME] | 3111 | [NAME] | Varies from  light grey to light  pink; may be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids and shell fragments | PALE-GREY | Uniform |  | TORQUAY LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard pale grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. Sometimes can be pale pink colour due to iron leaching into limestone | mostly competent | General building stone in are of use | Principal building stone in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]; widely used in [NAME] and the coastal  towns and villages of the Exe estuary. |  | L Horner | Devon County Council | [NAME] Atlas Area | Geodiversity, Audit of Active Aggregate quarries, [NAME] | 2012-05-16 10:20:37
3114 | Petitor Limestone | 3113 | [NAME] | Varies from  light grey to light  pink; may be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids and shell fragments | PALE-GREY | Uniform |  | TORQUAY LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard pale grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. Sometimes can be pale pink colour due to iron leaching into limestone | mostly competent | General building stone in are of use | Principal building stone in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]; widely used in [NAME] and the coastal  towns and villages of the Exe estuary. |  | L Horner | Devon County Council | [NAME] Atlas Area | Geodiversity, Audit of Active Aggregate quarries, [NAME] | 2012-05-16 10:20:37
3115 | Walls Hill Limestone | 3113 | [NAME] | Varies from  light grey to light  pink; may be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids and shell fragments | PALE-GREY | Uniform |  | WALLS HILL MEMBER | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard pale grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. Sometimes can be pale pink colour due to iron leaching into limestone | mostly competent | General building stone in are of use | Principal building stone in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]; widely used in [NAME] and the coastal  towns and villages of the Exe estuary. |  | L Horner | Devon County Council | [NAME] Atlas Area | Geodiversity, Audit of Active Aggregate quarries, [NAME] | 2012-05-16 10:20:37
3116 | [NAME] | 3113 | [NAME] | Varies from  light grey to light  pink; may be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids and shell fragments | PALE-GREY | Uniform |  | TORQUAY LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard pale grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. Sometimes can be pale pink colour due to iron leaching into limestone | mostly competent | General building stone in are of use | Principal building stone in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]; widely used in [NAME] and the coastal  towns and villages of the Exe estuary. |  | L Horner | Devon County Council | [NAME] Atlas Area | Geodiversity, Audit of Active Aggregate quarries, [NAME] | 2012-05-16 10:20:37
3117 | Lummaton  Limestone | 3113 | [NAME] | Varies from  light grey to light  pink; may be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids and shell fragments | PALE-GREY | Uniform |  | TORQUAY LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard pale grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. Sometimes can be pale pink colour due to iron leaching into limestone | mostly competent | General building stone in are of use | Principal building stone in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]; widely used in [NAME] and the coastal  towns and villages of the Exe estuary. |  | L Horner | Devon County Council | [NAME] Atlas Area | Geodiversity, Audit of Active Aggregate quarries, [NAME] | 2012-05-16 10:20:37
3118 | [NAME] | 3111 | Mid-Grey Devonian Limestone | May be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids. | GREY | Uniform |  | DADDYHOLE MEMBER | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard  grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. | Mostly competent | General building stone in are of use | Mid-Grey limestone , lithology very similar to the paler grey Torquay limestone. Used  in in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]. Some use in Exeter. |  | L Horner | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3119 | Mid-Grey Devonian Limestone | 1 | Brixham Limestone | May be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids. | GREY | Uniform |  | BRIXHAM LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard  grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. | Mostly competent | General building stone in are of use | Mid-Grey limestone , lithology very similar to the paler grey Torquay limestone. Used  in in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]. Some use in Exeter. |  | L Horner | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3120 | Hope's Nose Limestone | 3119 | Mid-Grey Devonian Limestone | May be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids. | GREY | Uniform |  | BRIXHAM LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard  grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. | Mostly competent | General building stone in are of use | Mid-Grey limestone , lithology very similar to the paler grey Torquay limestone. Used  in in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]. Some use in Exeter. |  | L Horner | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3121 | Berryhead Limestone | 3119 | Mid-Grey Devonian Limestone | May be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids. | GREY | Uniform |  | BRIXHAM LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard  grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. | Mostly competent | General building stone in are of use | Mid-Grey limestone , lithology very similar to the paler grey Torquay limestone. Used  in in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]. Some use in Exeter. |  | L Horner | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3122 | Sharkham Point Member | 3119 | Mid-Grey Devonian Limestone | May be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids. | GREY | Uniform |  | SHARKHAM POINT MEMBER | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard  grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. | Mostly competent | General building stone in are of use | Mid-Grey limestone , lithology very similar to the paler grey Torquay limestone. Used  in in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]. Some use in Exeter. |  | L Horner | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3123 | Goodrington Member | 3119 |  | May be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids. | GREY | Uniform |  | GOODRINGTON MEMBER | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard  grey limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; foliated in part. | Mostly competent | General building stone in are of use | Mid-Grey limestone , lithology very similar to the paler grey Torquay limestone. Used  in in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]. Some use in Exeter. |  | L Horner | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3124 | East Ogwell Limestone | 1 | Ogwell Marble | Pink with brown veins, rather crystalline, admits of a good polish | PALE-PINK | Uniform | ochre, grey | EAST OGWELL LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Hard pale pink limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; geologically the same as [NAME] but pale pink colour due to iron leaching into limestone | Mostly competent | General building stone in are of use | Principal building stone in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]; widely used in [NAME] and the coastal  towns and villages of the Exe estuary. |  | L Horner | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3125 | Stoneycombe Limestone | 3124 |  | Pink with brown veins, rather crystalline, admits of a good polish | PALE-PINK | Uniform | ochre, grey | EAST OGWELL LIMESTONE FORMATION | DEVONIAN | LIMESTONE | MEDIUM GRAINED |  | Hard pale pink limestone; poorly expressed bedding; homogeneous or crossed by irregular fractures; geologically the same as [NAME] but pale pink colour due to iron leaching into limestone | Mostly competent | General building stone in are of use | Principal building stone in a broad zone between [NAME] and the coast from [NAME] and Teignmouth to [NAME] and [NAME]; widely used in [NAME] and the coastal  towns and villages of the Exe estuary. |  | L Horner | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3126 | Dartmouth Group Sandstones | 1 |  | The Dartmouth Group is divided into two formations at its western end, the Whitsand Bay and [NAME] formations. The Whisand Bay Formation is characterized by purple and green slaty mudstone and siltstone with thin to medium beds of grey green sandstones and sporadic packets of pale grey quartzite sandstone beds, [NAME] by grey slaty mudstone and quartzitic sandstone with interbedded, apparently extensively silicified basic lava and volcaniclastic rocks | PURPLE | Banded | Pinkish grey and reddish brown | DARTMOUTH GROUP | DEVONIAN | SLATE | FINE GRAINED | Sandstone exhibit a variety of sedimentary structures such as cross-bedding | Red,purple, pinkish gray and greyish green inter bedded sandstones siltstones and mudstones. | Fairly weak, susceptible to weathering | The slabby nature of most of the material makes it suitable for the constuction of walls bothe buildings and outside walls. Its susceptibility to weathering means that it is commonly rendered | The group crops out in an extensive area between Wembury in the west to the Kingwear area  south of Torbay. It has been commonly used for building in that area. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Ussher, W A E. 1912 Geology of the country around Ivybridge and Modbury. Memoirs of the Geological Survey of Great Britain. (Sheet 349, England and Wales) [NAME], B E.  and others 2002. Geology of the Plymouth and southeast Cornwall area. Memoirs of the Geological Survey of Great Britain, (Sheet 348, England and Wales).  [NAME], B E. and others. 2003. Geology of the Torquay district - a brief explanation of the geological map. Sheet explanation of the Geological Survey of Great Britain. (Sheet 350, England and Wales). | 2012-05-16 10:20:37
3127 | [NAME] | 1 |  | Dark shales and siltstones with sporadic grey-brown sandstones and beds of decalcified shell debris. Upper part exhibits red coloration in places | RED | Uniform |  | MEADFOOT GROUP | DEVONIAN | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Silty and shaley partings | Forms small blocks, partly massive and homogeneous, partly shaley and crudely cleaved |  | Mainly rubble walling for all kinds of building | [NAME] and Chelston |  | M.C.Barr | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3128 | Meadfoot Slate | 1 |  | Dark shales and siltstones with sporadic grey-brown sandstones and beds of decalcified shell debris. Upper part exhibits red coloration in places | GREY | Uniform | Greenish grey and orange brown | MEADFOOT GROUP | DEVONIAN | SLATE | FINE GRAINED | Some of the sandstones are cross-bedded and the slates are well cleaved. | Grey interbedded mudstones  with a slaty cleavage, siltstones and sandstones some coarse grained | The sandstone are fairly strong, but the cleavage in the mudstone renders them fairly weak | Both the sandstone and the slates have been used In the construction of building walls, and some of the slates have been used as roofing slates. | One tract underlain by the group lies between Bigbury Bay in the west though to [NAME] on the east. Another tract farther inland runs from Bovisand in the Plymouth area to near Halwell in the east A farther smaller area occurs to the west of [NAME]. In all areas rocks from this group have been used for consruction of buildings useing bth the slates and sandstones.Born (1988) talksabout the export of slates from this area to other parts of the south coast of England. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Ussher, W A E. 1904. The Geology of the country around Kingsbrigde and [NAME]. Memoirs of the Geological Survey of Great Britain,( Sheets 355 and 356,  England and Wales.) [NAME], B E.  and others 2002. Geology of the Plymouth and southeast Cornwall area. Memoirs of the Geological Survey of Great Britain, (Sheet 348, England and Wales).  [NAME], B E. and others. 2003. Geology of the Torquay district - a brief explanation of the geological map. Sheet explanation of the Geological Survey of Great Britain. (Sheet 350, England and Wales).  Born, A. 1988. The Blue Slate quarrying industry of South Devon Industrial Archaeology Review Vol. 11 pp. 51-67. | 2012-05-16 10:20:37
3129 | Pilton Slates | 1 |  | Grey mudstones and siltstones with thin- to thick-bedded, locally calcareous sandstones and beds and lenses of limestone. Sandstones are thickest and predominate in the lower half of the formation, whereas mudstones predominate in the upper half | GREY | Uniform | [NAME] and yellowish grey | PILTON [NAME] | DEVONIAN to CARBONIFEROUS | MUDSTONES AND SILTSTONES | FINE GRAINED | Mudsones heavily cleaved | Well cleaved grey mudstones interbedded with fine-grained sandstones | Slates fairly weak and susceptible to weathering, but sandstone s strong | The sandstone would be suitable for local building and to a lesser extent the slate | The outcrop starts from Croyde Bay in the west, passes north of Barnstaple and heads towards the [NAME]/Somerset county boundary at East Anstey. The slates and sandstones are likely to have been utilised for local building along most of the length of oycrop |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Edmonds, E.A., and others. 1985. Geology of the Country around Ilfracombe and Barnstaple. Memoirs of the  Geological Survey of Great Britain. (Sheet 293, England and Wales) | 2012-05-16 10:20:37
3130 | Baggy Sandstone | 1 | Gritstone | Thinly bedded micaceous sandstones with colour variation from grey to greenish grey | GREY | Uniform | Brownish-grey | BAGGY SANDSTONES FORMATION | DEVONIAN | SANDSTONE, FINE-GRAINED | FINE GRAINED | Current bedding and ripple marks in places | Thinl bedded micaceous sandstones | Mostly competent | General building stone in are of use | [NAME], inland eastwards from Baggy Point |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1979. Geology of Bideford and Lundy Island. Memoirs of the Geological Survey of Great Britain. Sheet 292 (England and Wales) | 2012-05-16 10:20:37
3131 | Pickwell Down Sandstone | 1 | Gritstone | Massive to thinly bedded sandstone, micaceous in places, with colour variation from purple to grey-green | PURPLE | Uniform | Purplish brown | PICKWELL DOWN SANDSTONES FORMATION | DEVONIAN | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Current bedding and ripple marks in places | Hard massive sandstone, micaceous in part | Mostly competent | General building stone in area of use but also used dfurther afield in north and mid [NAME] both for its decorative nature and competant nature for quoins and dressings | [NAME], inland eastwards from Morte Bay |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1979. Geology of Bideford and Lundy Island. Memoirs of the Geological Survey of Great Britain. Sheet 292 (England and Wales) | 2012-05-16 10:20:37
3132 | Pickwell [NAME] | 3131 |  | Greyish pink, fine-grained sandstone | GREY | Mottled | Purplish brown | PICKWELL DOWN SANDSTONES FORMATION | DEVONIAN | SANDSTONE | FINE GRAINED | Current bedding and ripple marks in places | Hard massive sandstone, micaceous in part | Mostly competent | General building stone in area of use but also used dfurther afield in north and mid [NAME] both for its decorative nature and competant nature for quoins and dressings | [NAME], inland eastwards from Morte Bay |  | L Horner | Devon County Council | [NAME] Atlas Area | Watson, J. 1911. British & Foreign Building Stones. Cambridge University Press | 2012-05-16 10:20:37
3133 | [NAME] | 1 | Hangman Sandstone, Gritstone | Massive to well-bedded sandstone, with colour variation from red, purple to grey and greenish grey | RED | Uniform | Reddish brown | HANGMAN SANDSTONE FORMATION | DEVONIAN | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Current bedding in places | Hard massive sandstone | Mostly competent | General building stone in area of use | [NAME], inland eastwards from [NAME] |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1985. Geology of the country around Ilfracombe and Barnstaple Memoirs of the Geological Survey of Great Britain. Sheets 277 and 295 (England and Wales) | 2012-05-16 10:20:37
3134 | Foreland Grit | 3133 | Hangman Sandstone, Gritstone | Masive to well-bedded sandstone, with colour variation from red, purple to grey and greenish grey | RED | Uniform | Reddish brown | HANGMAN SANDSTONE FORMATION | DEVONIAN | SANDSTONE, MEDIUM-GRAINED | MEDIUM GRAINED | Current bedding in places | Hard massive sandstone | Mostly competent | General building stone in area of use | [NAME], inland eastwards from [NAME] |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1985. Geology of the country around Ilfracombe and Barnstaple Memoirs of the Geological Survey of Great Britain. Sheets 277 and 295 (England and Wales) | 2012-05-16 10:20:37
3135 | Liddaton Formation | 1 |  | Grey and greenish grey slate, siltstone and sandstone laminae. (This formation includes the Overwood Slate Member). | GREY | Uniform | Yellowish grey | LIDDATON [NAME] | DEVONIAN | NOT ENTERED | FINE GRAINED | Heavily cleaved and sheared | Has a somewhat more greenish colouration than the adjacent dark grey Lydford Formation | Fairly weak, susceptible to weathering | Most likely to have been used as rubble stone in wall construction. | The Liddaton Formation crops out in an east-west belt of country stretching from  the River Tamar in the west, through Liddaton to Lydford in the east. It was probably used locally in this area as building stone. The Overwood Slate is a member within this formation and it crops out north of Lifton. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | BRITISH GEOLOGICAL SURVEY. 1993. Tavistock. England and [NAME] 337. Solid and Drift Geology. 1:50 000. Provisional Series. (Keyworth, British Geological Survey.) | 2012-05-16 10:20:37
3136 | Middle Devonian Slates | 1 |  | Mainly grey to dark grey slates often associated with volcanic material and small limestone beds | GREY | Uniform | yellowish grey to orange | MIDDLE DEVONIAN SLATES | DEVONIAN | NOT ENTERED | FINE GRAINED | Heavily cleaved | Dark grey to grey slates as opposed to the greenish grey Upper Devonian Slates | Fairly weak, susceptible to weathering | Most likely to have been used as rubble stone in wall construction. | This is an older blanket term for slates in the large area between Plymouth, Ivybridge and Ermington and Harberton, south west of Totnes. To the west and east of this area modern mapping has resulted in the reclassification of this unit with a division into new formations such as the Nordon Formation. The Middle Devonian will have been used throughout the area as a building material for walls. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | BRITISH GEOLOGICAL SURVEY. 1912. Ivybridge. England and [NAME]. Solid and Drift Geology. 1:50 000. (Keyworth, British Geological Survey.)  Ussher, W A E. 1912 Geology of the country around Ivybridge and Modbury. Memoirs of the Geological Survey of Great Britain. (Sheet 349, England and Wales) | 2012-05-16 10:20:37
3137 | Morte Slates | 1 |  | Smooth greenish grey to purple slates, locally silty with a few fine-grained sandstones and impersistent thin limestones. | GREY | Uniform | Silvery greenish grey | MORTE SLATES FORMATION | DEVONIAN | SLATE | FINE GRAINED | Beddind indistinct with slaty cleavage dominant | Greenish grey colour very strong slaty cleavage with lustrous sheen on cleavage surfaces | Fairly strong but some susceptibility to weathering by frost action | Used as roofing slate and for slate hung walls. More rubbly material such as waste used in building walls | The formation crops out in a wide band from Morte Point east-southeastwards across Exmoor towards Somerset. Extensive use particularly in the western area where the slates could be quarried from the cliffs. Besides being used at Woolacombe and Mortehoe they have been used in Barnstaple. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Edmonds, E A. and others. 1979. Geology of Bideford and Lundy Island. Memoirs of the Geological Survey of Great Britain. (Sheets 292 with 275,276, 291 and parts of 308, England and Wales) Edmonds, E.A., and others. 1985. Geology of the Country around Ilfracombe and Barnstaple. Memoirs of the  Geological Survey of Great Britain. (Sheet 293, England and Wales) | 2012-05-16 10:20:37
3138 | Middle & Upper Devonian Limestones | 1 |  |  |  |  |  | MIDDLE AND UPPER DEVONIAN LIMESTONES | DEVONIAN | NOT ENTERED |  |  |  |  |  | [NAME] Entry |  | D Cameron | Devon County Council | [NAME] Atlas Area |  | 2012-05-16 10:20:37
3139 | [NAME] | 3138 |  | Thinly bedded limestones  within slate sucessions, commonly showing complex tectonic disturbance | GREY | Uniform | Brownish-grey | ILFRACOMBE SLATES FORMATION | DEVONIAN | LIMESTONE | FINE GRAINED | Oolitic in places | Mostly thinly bedded limestone | Mostly competent | General building stone in area of use | [NAME], inland eastwards from Ilfracombe and [NAME] |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1985. Geology of the country around Ilfracombe and Barnstaple Memoirs of the Geological Survey of Great Britain. Sheets 277 and 295 (England and Wales) | 2012-05-16 10:20:37
3140 | [NAME] | 3139 | [NAME] | Thinly bedded limestones  within slate sucessions, commonly showing complex tectonic disturbance | GREY | Uniform | Brownish-grey | JENNY START LIMESTONE | DEVONIAN | LIMESTONE | FINE GRAINED | Oolitic in places | Mostly thinly bedded limestone | Mostly competent | General building stone in area of use | [NAME], inland eastwards from Ilfracombe and [NAME] |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1985. Geology of the country around Ilfracombe and Barnstaple Memoirs of the Geological Survey of Great Britain. Sheets 277 and 295 (England and Wales) | 2012-05-16 10:20:37
3141 | [NAME]'s Stone Limestone | 3139 | [NAME] | Thinly bedded limestones  within slate sucessions, commonly showing complex tectonic disturbance | GREY | Uniform | Brownish-grey | [NAME] STONE LIMESTONE | DEVONIAN | LIMESTONE | FINE GRAINED | Oolitic in places | Mostly thinly bedded limestone | Mostly competent | General building stone in area of use | [NAME], inland eastwards from Ilfracombe and [NAME] |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1985. Geology of the country around Ilfracombe and Barnstaple Memoirs of the Geological Survey of Great Britain. Sheets 277 and 295 (England and Wales) | 2012-05-16 10:20:37
3142 | [NAME] | 3139 | [NAME] | Thinly bedded limestones  within slate sucessions, commonly showing complex tectonic disturbance | GREY | Uniform | Brownish-grey | [NAME] LIMESTONE | DEVONIAN | LIMESTONE | FINE GRAINED | Oolitic in places | Mostly thinly bedded limestone | Mostly competent | General building stone in area of use | [NAME], inland eastwards from Ilfracombe and [NAME] |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1985. Geology of the country around Ilfracombe and Barnstaple Memoirs of the Geological Survey of Great Britain. Sheets 277 and 295 (England and Wales) | 2012-05-16 10:20:37
3143 | Rillage Limestone | 3139 | [NAME] | Thinly bedded limestones  within slate sucessions, commonly showing complex tectonic disturbance | GREY | Uniform | Brownish-grey | RILLAGE LIMESTONE | DEVONIAN | LIMESTONE | FINE GRAINED | Oolitic in places | Mostly thinly bedded limestone | Mostly competent | General building stone in area of use | [NAME], inland eastwards from Ilfracombe and [NAME] |  | R C Scrivener | Devon County Council | [NAME] Atlas Area | Edmonds E.A and others, 1985. Geology of the country around Ilfracombe and Barnstaple Memoirs of the Geological Survey of Great Britain. Sheets 277 and 295 (England and Wales) | 2012-05-16 10:20:37
3144 | [NAME] | 1 |  | A mudstone dominant sequence of variably [NAME] grey and purple rock including many thin sandstones as well as thin and thick limestones | GREY | Mottled | Yellowish and browish grey | [NAME] MEMBER | DEVONIAN | SLATE | FINE GRAINED | Strongly cleaved and sheared with common examples of tight folding | Well cleaved slates variable in colour from grey to grrenish grey and purple. Thin sandstone and limestone bands common some limestones thick enough to be quarried | Because of interaction of bedding, cleavage and shearing the rock is generally friable and weak | Probably some use in as rubble stone in constructing walls, but too friable for roofing. Possible use in slate hung walls. | East-south -east trending band of outcrop stretching from Hele Bay to the west of [NAME] through the Balckmoor Gate area to the Somerset border. The main use would have been in the Combe Martin Area but it might have been used sporadicaly farther east. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Edmonds, E.A.and others. 1985. Geology of the Country around Ilfracombe and Barnstaple. Memoir of the  Geological Survey of Great Britain. (Sheets 277 and 293, England and Wales) | 2012-05-16 10:20:37
3145 | Kentisbury Slates | 1 |  | Grey silty slates and sandstones showing intense deformation and disruption of the bedding by a strong penetrative slatey cleavage | GREY | Banded | Grey and  pale greenish grey | KENTISBURY SLATES MEMBER | DEVONIAN | SLATE | FINE GRAINED | Marked interaction of cleavage with bedding | Stromg slaty cleavage which slices up the many thin sandstone and siltstone thin beds and laminae into lenses. | In spite of strong cleavage the rock seems fairly strong | May have been used in wall construction with a cover of render. Perhaps some use as roofing slates. | Crops out in a tract of country stretching east-south-eastwards from the Ilfracombe area towards [NAME] and on to the Somerset border. Use would have been mainly in the Ilfracombe area. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Edmonds, E.A.and others. 1985. Geology of the Country around Ilfracombe and Barnstaple. Memoir of the  Geological Survey of Great Britain. (Sheets 277 and 293, England and Wales) | 2012-05-16 10:20:37
3146 | Nordon Formation | 1 |  | Grey to dark grey slates with lenticles and some thicker beds of limestone. Units of spilitic [NAME] and tuffs are common | GREY | Uniform | Orange grey | NORDON FORMATION | DEVONIAN | SLATE | FINE GRAINED | Heavily cleaved | Grey mudstone with thin beds of siltstone and lenses of fine-grained sandstone. Tuffs also occur in lenses | Fairly weak, susceptible to weathering | Most likely to have been used as rubble stone in wall construction. | Crops out in the area west of Dittisham and between Tones and Torbryan. Much dirupted by faulting. Likely to have been used extensively in this area for wall construction in houses and other buildings. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Selwood, E B. and others, 1984, Geology of the country around Newton Abbot. Memoir of the Geological Survey of Great Britain, (Sheet 339, England and Wales)  Leveridge, B E. and others. 2003. Geology of the Torquay district - a brief explanation of the geological map. Sheet explanation of the Geological Survey of Great Britain. (Sheet 350, England and Wales). | 2012-05-16 10:20:37
3147 | Overwood Slate | 1 |  | Dark grey slates containing rare siliceous and calcareous nodules | GREY | Uniform | Orange grey | OVERWOOD SLATE MEMBER | DEVONIAN | SLATE | FINE GRAINED |  | Greenish grey to dark grey slate | Fairly weak, susceptible to weathering | No known use | Small outcrop to the north westof Lifton. Unlikely to have had much use locally. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | [NAME], I J. 1981 Late Devonian and Lower Carboniferous conodonts from north [NAME] and their stratigraphical significance. Proceedings of the Ussher Society, Vol. 5. pp.178-184. BRITISH GEOLOGICAL SURVEY. 1993. Tavistock. England and [NAME] 337. Solid and Drift Geology. 1:50 000. Provisional Series. (Keyworth, British Geological Survey.) | 2012-05-16 10:20:37
3148 | [NAME] | 1 |  | Varies from dark to light grey, some parts pink; may be crossed by irregular calcite veins; may contain fragments with tabulate and rugose corals and stromatoporoids.  Darker grey limestone has some clay in structure | GREY | Uniform |  | PLYMOUTH LIMESTONE FORMATION | DEVONIAN | LIMESTONE, FOSSILIFEROUS | MEDIUM GRAINED |  | Massive bedded pale to medium-grey, occasionally dark-grey well-bedded micritic limestones, some calcitic veining | Some spalling where faces coincide with natural faulting and faces particularly the darker grey stone which contains some clay |  | Plymouth especially the Dockyard, Fornt and for [NAME] and venacular buildings in and around Plymouth, and east towards Yealmpton. A very hard stone which can be difficult to work |  | L Horner | Devon County Council | [NAME] Atlas Area | Le Page, Amanda, Conservation of Plymouth limestone and associated mortar, Plymouth, 1996. | 2012-05-16 10:20:37
3149 | [NAME] | 1 |  | Purple, green and greyish green mudstones. Scattered siliceous and calcareous nodules developed at some levels. A prominent 10m-thick unit of buff-weathering calcareous laminated siltstone capped by 2m of interbedded grey silty mudstones and siliceous black mudstones is present at the top of the Formation | GREEN | Mottled | [NAME] | RORA MUDSTONE FORMATION | DEVONIAN | SLATE | FINE GRAINED | Heavily cleaved with sedimentary lamination and cleavage coincident | Variegated colour ranging through bluish green, greenish grey and purple. Some decalcified limestone lenses and some siicified slate. | Fairly weak, susceptible to weathering | Any use would have been as a rubble stone in wall constuction. | Small faulted outcrops to the south east of Ilsington, where the slate may have been used for building |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Selwood, E B. and others, 1984, Geology of the country around Newton Abbot. Memoir of the Geological Survey of Great Britain, (Sheet 339, England and Wales) | 2012-05-16 10:20:37
3150 | Liverton Slates | 3149 | [NAME] | Purple, green and greyish green mudstones. Scattered siliceous and calcareous nodules developed at some levels. A prominent 10m-thick unit of buff-weathering calcareous laminated siltstone capped by 2m of interbedded grey silty mudstones and siliceous black mudstones is present at the top of the Formation | GREEN | Mottled | [NAME] | RORA MUDSTONE FORMATION | DEVONIAN | SLATE | FINE GRAINED | Heavily cleaved with sedimentary lamination and cleavage coincident | Variegated colour ranging through bluish green, greenish grey and purple. Some decalcified limestone lenses and some siicified slate. | Fairly weak, susceptible to weathering | Any use would have been as a rubble stone in wall constuction. | Small faulted outcrops to the south east of Ilsington, where the slate may have been used for building. |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Selwood, E B. and others, 1984, Geology of the country around Newton Abbot. Memoir of the Geological Survey of Great Britain, (Sheet 339, England and Wales) | 2012-05-16 10:20:37
3151 | Islington Slates | 3149 | [NAME] | Purple, green and greyish green mudstones. Scattered siliceous and calcareous nodules developed at some levels. A prominent 10m-thick unit of buff-weathering calcareous laminated siltstone capped by 2m of interbedded grey silty mudstones and siliceous black mudstones is present at the top of the Formation | GREEN | Mottled | [NAME] | RORA MUDSTONE FORMATION | DEVONIAN | SLATE | FINE GRAINED | Heavily cleaved with sedimentary lamination and cleavage coincident | Variegated colour ranging through bluish green, greenish grey and purple. Some decalcified limestone lenses and some siicified slate. | Fairly weak, susceptible to weathering | Any use would have been as a rubble stone in wall constuction. | Small faulted outcrops to the south east of Ilsington, where the slate may have been used for building |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Selwood, E B. and others, 1984, Geology of the country around Newton Abbot. Memoir of the Geological Survey of Great Britain, (Sheet 339, England and Wales) | 2012-05-16 10:20:37
3152 | Start Hornblende Schists | 25 |  | Green hornblend-epidote-albite schist which can have most of the original hornblende altered to chlorite. | GREEN | Banded | [NAME] | [NAME] | DEVONIAN | HORNBLENDE SCHIST | MEDIUM GRAINED | Strong schistose fabric and traces of tight to isoclinal folding. Cut by irregular stringers of quartz | Strong Schistosity. Much hornblende or it degradation products such as chlorite | Fairly weak rock. Interaction of schistosity, bedding and veining give a very hackly texture to the weahered surfaces | Rubble stone for the constuction of walls | In the area between [NAME], [NAME] and Start Point |  | E C Freshney | Devon County Council | [NAME] Atlas Area | BRITISH GEOLOGICAL SURVEY. 2000. Kingsbridge, [NAME] and [NAME]. England and Wales Sheet 355 and 356. Solid and Drift Geology. 1:50 000. Provisional Series. (Keyworth, British Geological Survey.) Ussher, W A E. 1904. The Geology of the country around Kingsbrigde and [NAME]. Memoirs of the Geological Survey of Great Britain,( Sheets 355 and 356,  England and Wales.) www.devon.gov.uk/geo-lowerdevonianschists.pdf | 2012-05-16 10:20:37
3153 | Start Mica Schists | 3152 |  | Grey quartz-albite-muscovite schist. | PALE-GREY | Banded | Grey to pale grey | START MICA SCHISTS | DEVONIAN | MICA SCHIST | MEDIUM GRAINED | Strong schistose fabric and traces of tight to isoclinal folding. Cut by irregular stringers of quartz | Strong Schistosity. Much pale mica | Fairly weak rock. Interaction of schistosity, bedding and veining give a very hackly texture to the weahered surfaces | Rubble stone for the constuction of walls | In the area between [NAME], [NAME] and Start Point |  | E C Freshney | Devon County Council | [NAME] Atlas Area | BRITISH GEOLOGICAL SURVEY. 2000. Kingsbridge, [NAME] and [NAME]. England and Wales Sheet 355 and 356. Solid and Drift Geology. 1:50 000. Provisional Series. (Keyworth, British Geological Survey.) Ussher, W A E. 1904. The Geology of the country around Kingsbrigde and [NAME]. Memoirs of the Geological Survey of Great Britain,           ( Sheets 355 and 356,  England and Wales.) [NAME], J. 1911. British & Foreign Building Stones. Cambridge University Press www.devon.gov.uk/geo-lowerdevonianschists.pdf | 2012-05-16 10:20:37
3154 | Ashprington Volcanics | 346 |  | Dark greyish green basalt lava with subordinate volcaniclastic rocks such as tuffs some of which are agglomeratic. Limestones and grey or purplish mudstones are sometime interbedded with the lavas and tuffs. | DARK-GREEN | Mottled | Purple, red and ochre yellow | ASHPRINGTON VOLCANIC FORMATION | DEVONIAN | BASALT LAVA | MEDIUM GRAINED | Some of the lava flows are tens of metres thick with the thickest units showing the poorest cleavage. | Sometimes porphyritic with feldspar phenocrysts and some vesicular with amygdales | Fairly strong particularly in the units with poorest cleavage. Thinner units with more intense cleavage more susceptible to weathering. | General building stone | Totnes - Ashprington area |  | E C Freshney | Devon County Council | [NAME] Atlas Area | Champernowne, A 1889. On theAshprington volcanic Series of South Devon. [NAME] of the Geological Society ofLondon  45, 369-379  Leveridge, B E. and others. 2003. Geology of the Torquay district - a brief explanation of the geological map. Sheet explanation of the Geological Survey of Great Britain. (Sheet 350, England and Wales).   http://www.devon.gov.uk/walk54 | 2012-05-16 10:20:37
3155 | [NAME] | 5 |  | Sandstone |  |  |  | PARENT DATA NOT YET ENTERED [HIERARCHY CODE] | CARBONIFEROUS | SANDSTONE |  |  |  |  | ? | [NAME] |  | D Cameron | Devon County Council | [NAME] Atlas Area | [NAME] | 2012-05-16 10:20:37
3156 | [NAME] | 3152 |  | Schist |  |  |  | PARENT DATA NOT YET ENTERED [HIERARCHY CODE] |  | METAMORPHIC ROCK, SCHISTOSE |  |  |  |  | ? | [NAME] usage | 2011-06-22 00:00:00 | D Cameron | Devon County Council | [NAME] Atlas Area | [NAME] spreadsheet | 2012-05-16 10:20:37
3157 | Banded grey recrystallised limestone and sandstone with chert | 1 |  | Banded grey recrystallised limestone and sandstone with chert | GREY | Banded |  | PARENT DATA NOT YET ENTERED [HIERARCHY CODE] |  | SEDIMENTARY |  | Banded | Banded grey recrystallised limestone and sandstone with chert |  | Walling | [NAME] usage |  | D Cameron | Devon County Council | [NAME] Atlas Area | [NAME] | 2012-05-16 10:20:37
3158 | Adinole | 330 | Pale cream orange stained rock | Pale cream orange stained rock, possibly adinole | PALE-YELLOW | Uniform | Orange stained | PARENT DATA NOT YET ENTERED [HIERARCHY CODE] |  | ADINOLE |  |  | Pale cream orange stained rock |  | Walling | [NAME] usage |  | D Cameron | Devon County Council | [NAME] Atlas Area | [NAME] | 2012-05-16 10:20:37
3159 | Slate | 9 |  | Slate |  |  |  | PARENT DATA NOT YET ENTERED [HIERARCHY CODE] |  | SLATE |  |  |  |  | Roofing | [NAME] | 2011-06-23 00:00:00 | D Cameron | Devon County Council | [NAME] Atlas Area | [NAME] | 2012-05-16 10:20:37
3160 | Stone Flags (Unknown) | 10 |  | Thin bedded or fissile sedimentary rock |  |  |  | PARENT DATA NOT YET ENTERED [HIERARCHY CODE] |  | SEDIMENTARY |  |  |  |  | Roofing | [NAME] | 2011-06-23 00:00:00 | D Cameron | Devon County Council | [NAME] Atlas Area | [NAME] | 2012-05-16 10:20:37
3161 | Bodmin Granite | 3059 |  | Granite | GREY |  |  | BODMIN INTRUSION | CARBONIFEROUS to PERMIAN | GRANITE |  |  |  |  | Walling | [NAME] usage |  | D Cameron | Devon County Council | [NAME] Atlas Area | Sources spreadsheet | 2012-05-16 10:20:37
3162 | Bow [NAME] | 3031 |  | Because of coarse grain size, building blocks are hard to dress.  Consequently they tend to have somewhat rounded outlines.  The spaces between may be filled with smaller block of fsandstone. |  |  |  | BOW BRECCIA FORMATION | PERMIAN | BRECCIA |  |  |  |  | Walling | [NAME] usage |  | D Cameron | Devon County Council | [NAME] Atlas Area | Sources spreadsheet | 2012-05-16 10:20:37
3163 | [NAME] | 1 |  |  |  |  |  | [NAME] | CARBONIFEROUS | SLATE |  |  |  |  | Walling | [NAME] usage |  | D Cameron | Devon County Council | [NAME] Atlas Area | Sources spreadsheet | 2012-05-16 10:20:37
3164 | Codden Hill Beds | 3085 |  | [NAME] |  |  |  | CODDEN HILL [NAME] | CARBONIFEROUS | BRECCIA |  |  |  |  | Walling | [NAME] usage |  | D Cameron | Devon County Council | [NAME] Atlas Area | Sources spreadsheet | 2012-05-16 10:20:37
3165 | [NAME] | 3086 | [NAME] | Grey limestone | GREY |  |  | TEIGN CHERT FORMATION | CARBONIFEROUS | METALIMESTONE |  |  |  |  | Walling | [NAME] usage |  | D Cameron | Devon County Council | [NAME] Atlas Area | Sources spreadsheet | 2012-05-16 10:20:37