bluuebunny/crossref_metadata_2025 huggingface dataset:
Apercus sur la tectonique cassante de la zone axiale des Pyrenees orientales entre les bassins de Cerdagne et de l'Ampurdan-Roussillon
Authors: Fontbote Jose Maria , Guitard G.
Published: June 2020

The distribution of fault systems in the axial zone of the eastern Pyrenees between the Cerdagne and Ampurdan-Roussillon basins (France) is described. Four fault systems form a network; the trends are more or less east-west, northwest-southeast, northeast-southwest, and north-south. Many of these faults also affect the post-Hercynian cover, including the Eocene. They range in age from late Hercynian to late Tertiary. The late Tertiary played a determining role in the structure of this part of the Pyrenees.
Seance a Perpignan
Authors: Barrabe Louis
Published: June 2020

Report of general meetings held during the eastern Pyrenees field trip of the Societe Geologique de France in September 1958; includes discussion of some of the problematic geologic features observed during the field trip, particularly the color of Gotlandian (Silurian) schists, the evidence of granitization of the Mont-Louis massif, the Albere paleovolcanic series, the Devonian-Carboniferous boundary, and the metamorphism of the Canigou massif.
Observations sur la tectonique de la partie sud-ouest du massif du Mont-Blanc
Authors: Gidon Paul
Published: June 2020

Observations in the upper Bon Nant valley in the southwest part of the Mont Blanc massif show that klippes are more numerous than hitherto supposed. They indicate that dislocation at the base of the Tre-la-Tete and Mont-Tondu massifs involved faulting, during which tectonic slices were superposed on each other from east to west, and that large vertical faults are probably absent.
Observations sur la tectonique de la chaine pre-littorale catalane au N et au NW du "Campo de Tarragona" (Espagne)
Authors: Porta Jaime de
Published: June 2020

The north and northwest borders of the so-called Campo de Tarragona depression in Spain differ in tectonic style. The Serra de Prades on the north shows broad folds with some faults, whereas in the Llaveria-Vandellos zone on the northwest there is a thicker folded Mesozoic cover with an extensive overthrust and other faults.
Contribution a l'etude geologique de la zone d'Acceglio-Longet dans la haute Varaita (Alpes cottiennes, Italie)
Authors: Michard Andre
Published: June 2020

A polymetamorphic basement, a Permo- Carboniferous complex, and a Mesozoic cover exhibiting affinities with the Brianconnais tectonic zone are distinguished in the Acceglio-Longet area of the upper Varaita valley in the Cottian Alps, Italy. Study of tectonic relationships leads to the conclusion that rocks of the Schistes lustres form an overthrust mass.
Remarques a propos de quelques faits et hypotheses concernant l'age des Schistes lustres piemontais dans les Alpes cottiennes et brianconnaises
Authors: Lemoine Marcel
Published: June 2020

Paleontologic evidence concerning the age of the Piedmont Schistes lustres complex is rare. Only the substratum (Triassic) and lowermost basal beds (Rhaetian-lower Liassic) can be so dated. Two examples are given from the Cottian and Brianconnais Alps that show how difficult dating on the basis of petrographic criteria is due to structural complications. It is possible that the major part of the Schistes lustres complex is separated by abnormal contacts from the fossiliferous Triassic-Liassic beds, which may, however, represent its base.
Sedimentation argileuse et phosphatee au Dahomey
Authors: Slansky Maurice , Camez T. , Millot G.
Published: June 2020

The distribution of argillaceous facies relative to arenaceous facies in the Cretaceous- Tertiary sequence of the coastal sedimentary basin of Dahomey (west Africa) confirms the importance of clay sedimentation, with two major phases of deposition of attapulgite and with abundant development of montmorillonite, during the lower Eocene in Africa. Attapulgite is not represented in facies that contain phosphate and glauconite, but montmorillonite frequently accompanies the attapulgite and is equally common in phosphatic beds. The phosphate and glauconite facies correspond to agitated conditions of sedimentation, the attapulgite to calm conditions.
Les series primaires au N et NW de l'Air (Sahara central); discordances observees
Authors: Joulia Francois
Published: June 2020

North and northwest of the Aier massif in the central Sahara the Paleozoic section, well exposed in the Tin Seririne syncline and dated by three fossiliferous zones, lies unconformably on the Precambrian basement. Three other unconformities are visible in the sequence, indicating movements of small amplitude in the Cambro-Ordovician, at the beginning of the Devonian, and in the Carboniferous. The formation at the top of the sequence is tentatively attributed a Permo-Jurassic age.
Note paleontologique sur le Permien de Lodeve et de Bourbon-l'Archambault
Authors: Doubinger Jeanne , Heyler D.
Published: June 2020

An impression of Odontopteris subcrenulata was found during excavations in the Autunian at Bourbon-l'Archambault, and animal and plant remains were found in Permian (Autunian and Saxonian) deposits near Lodeve. The Autunian plants are classic types, but the one found in Saxonian deposits near Lodeve is rare, in that it has never previously been described from the region and is unknown elsewhere in France. It belongs to Callipteris uralensis (or a very similar species), known from the Kuznetsk basin (USSR). Among the vertebrate remains, Acanthodes and Palaeoniscides species are already known from the lower Autunian, but those reported here are from the middle or upper Autunian. Also found in the Saxonian deposits are footprints of small tetrapods (amphibians or reptiles), mollusks, ripple marks, mud cracks, raindrop impressions, and the like, all indicating a climate which was drier than is generally reported.
Sur les decapodes eocenes du Senegal occidental
Authors: Gorodiski Alexandre , Remy J. M.
Published: June 2020

In addition to four known species, the early Tertiary decapod fauna of western Senegal contains three new species--Archaeopus senegalensis, Micromaia simplex, and Atelecyclus gorodiskii. Notes on the Paleocene-Lutetian stratigraphy are included.
Les recifs coralliens a petits lagons multiples de la baie Ramanetaka (cote nord-ouest de Madagascar)
Authors: Guilcher Andre
Published: June 2020

Describes a unique type of reef in Ramanetaka bay on the northwest coast of Madagascar, where multiple small lagoons are formed as a result of the branching and coalescing growth of corals. The conditions favoring such development are shallow depth and coral growth which is more rapid than erosion. Eventually the lagoons become filled with fine detritus.
Deux exemples actuels de "biolithosores" construits par des annelides
Authors: Lucas Gabriel
Published: June 2020

Describes two examples of rock masses built by annelid worms, one by serpulids in the Lake of Tunis (Tunisia), the other by sabellariids near low-tide mark off Mont-Saint-Michel (northwest France). The term biolithosore is proposed for such structures.
Recifs, biohermes ou bancs fossiliferes d'Archaeocyatha
Authors: Debrenne Francoise
Published: June 2020

Application of the term reef to archeocyathid accumulations is discussed. Archeocyathids occur as isolated individuals within the trilobite-brachiopod-hyolite faunal association of a fossiliferous zone, as an important element of more or less continuous massive beds, and as constituents of bioherms. In all cases the occurrences are of more primitive character than true reef formations. The archeocyathids do not form complexes characteristic of particular climatic and bathymetric conditions.
Formations recifales et hystrichospheres
Authors: Deunff Jean
Published: June 2020

The discovery of a hystrichosphere microfauna in a Devonian reef formation has posed a problem concerning the conditions leading to the association of supposedly planktonic forms and reef forms. Similar associations are known from the Gotlandian (Silurian) and Carboniferous localities. The probable environment of the association is tentatively formulated.
Nouvelles observations dans le district stannifere d'Abbaretz-Nozay (Loire-Atlantique)
Authors: Chauris Louis , Pare B.
Published: June 2020

Tin-bearing alluvial deposits and cassiterite-bearing kaolinized granulite have been discovered at La Villefoucre near Nozay, west of the area of tin mineralization of the Abbaretz district, France. The alluvial deposits are not important, but this is the first time a cassiterite-bearing kaolinized granulite has been reported in the Armorican massif; only vein occurrences of tin have been known previously. A connection between the veins and the extension in depth of the Nozay granulite is established.
Le karst et la nappe dans la craie turonienne et senonienne du bassin de la Vanne (Yonne)
Authors: Megnien Claude
Published: June 2020

Circulation of ground waters in the Cretaceous (Turonian-Senonian) chalk in the basin at the foot of the Othe plateau, France, from which the Vanne springs issue, can be explained only in terms of movement in both karst channels and under water-table conditions.
Geologie et genie nucleaire [with discussion]
Authors: Leveque Paul
Published: June 2020

The role of geology in the principal phases of planning, construction, and operation of nuclear installations is discussed. In addition, different aspects of the problem of stockpiling and of disposal of radioactive wastes involve geology and related disciplines.
Du nouveau sur l'age des tufs volcaniques du pays nicois
Authors: Bourcart Jacques , Le Calvez Y. , Siffre M.
Published: June 2020

Borings in connection with a highway project throw light on the age of the volcanic tuffs of the Nice region, France. Remnants of the tuffs occur throughout a region extending from Antibes to Monaco. In places they rest on hitherto unmapped Eocene marls; elsewhere they contain intercalations of gray-blue marl that contains an unmistakably Plaisancian (Pliocene) fauna. They are therefore Pliocene rather than Miocene.
Deformations tardives du synclinal de Pompignan-Saint-Martin-de-Londres et antecedence du reseau hydrographique (feuille du Vigan au 80.000e)
Authors: Gottis Maurice
Published: June 2020

Certain anomalies in the drainage pattern of the Pompignan-Saint-Martin-de-Londres synclinal region, France, can be explained only on the basis of antecedence of part of the drainage system with respect to warping of the margins of the syncline. The principal evidence supporting this explanation is discussed.
Etude granulometrique de la fraction sableuse des alluvions de la crue de juin 1957 sur le Guil (Hautes-Alpes)
Authors: Tricart Jean
Published: June 2020

Two fundamental types of curves (S-shaped and parabolic) were obtained in a granulometric study of the sand fraction of material carried by the Guil (France) in the flood of 1957. The S-shaped curve corresponds to well-sorted alluvium which has been transported in mechanical suspension and in which pebbles and gravels are rare; the parabolic curve corresponds to material whose transport has been obstructed. The effect of local geomorphic conditions on sedimentation was marked even in this violent flood.
Nouvelle stratigraphie des series primaires du nord du Fouta-Djalon (Guinee, Senegal)
Authors: Arnould Michel , Ayme J. M.  , Guillaume R.
Published: June 2020

Geologic reconnaissance has permitted the identification of Infracambrian, Cambrian, Ordovician, Gotlandian (Silurian), and Devonian formations in the Paleozoic rocks outcropping in the northern part of the Fouta-Djalon massif (Guinea and Senegal). The Infracambrian rests with a major unconformity on a tilted basement and is characterized by the occurrence of stromatolite- and oncolite-bearing beds at its base. The base of the Cambrian is marked by a tillite. The fossiliferous Devonian and Gotlandian deposits have been known for a long time. The results of the reconnaissance show that substantial changes are necessary in the geologic map of the region, particularly elimination of the Falemian.
Remarques au sujet des foraminiferes du sous-ordre des Pluriloculinidea
Authors: Glacon Georgette
Published: June 2020

Examination of Tertiary microfaunas from Algeria has permitted a detailed study of different ontogenetic stages of the suborder Pluriloculinidea. Although growth characters (successive addition of chambers) are essential criteria for interpreting ontogeny, their identification may be rendered difficult by certain factors which can lead to erroneous conclusions, such as mortality rates, the natural disappearance of embryonic forms, sorting in the sediment, and ecologic diversity.
Modification de l'ontogenese pendant l'evolution des lepidocyclines (foraminiferes)
Authors: Vlerk I. M. van der
Published: June 2020

The systematic ontogenetic variation in the evolution of the lepidocyclines is worked out. The importance of this variation in their chronologic and geographic distribution is discussed.
Sur les differents stades de l'astogenese de certains bryozoaires cheilostomes
Authors: Voigt Ehrhard
Published: June 2020

In certain cheilostomatous bryozoans, the zoarial ontogeny ("astogenesis") shows extremely varied exterior aspects which must be known in order to define and recognize species orgenera.
Observations sur de jeunes coquilles de mollusques du Pliocene saumatre du Llobregat (Barcelone)
Authors: Gillet Suzette
Published: June 2020

Detailed study of the initial stages of development of the shell ornamentation of mollusks from Pliocene brackish-water sediments of the Llobregat valley (Barcelona, Spain) was possible because of the great numbers of young or incompletely developed adult forms which could not survive the brackish environment.
Geodynamique et volcanisme du fosse de Montbrison et du horst du Forez (morphotectonique, paleovolcanologie et paleomagnetisme)
Authors: Bobier Claude , Glangeaud L.
Published: June 2020

More than 50 volcanic outcrops on the eastern border of the Forez horst and the adjacent Montbrison plain in the Central Massif of France have been studied from the point of view of paleovolcanism and paleomagnetism. Oligocene, Miocene, and Ponto-Pliocene eruptions are distinguished on the basis of relationships with erosion surfaces in the mountains and deposits on the plain. Paleomagnetic measurements corroborate this dating. The Oligocene and Pontian lavas are inversely magnetized, the Miocene and Pliocene normally. The geologic history of the area since the pre-Oligocene peneplanation is outlined.
Contribution a l'etude du genre Taeniopteris Brongniart
Authors: Doubinger Jeanne , Vetter P.
Published: June 2020

Examination of numerous specimens of Taeniopteris and critical study of the original descriptions and figures lead to precise definition of the specific characteristics of T. jejunata, T. multinervis, and T. plauensis and to the erection of a new species, T. tenuis, for material from the Stephanian (Carboniferous) of Decazeville, France.
Sur une paragenese ephemere a lawsonite et glaucophane dans le metamorphisme alpin en Haute-Maurienne (Savoie)
Authors: Ellenberger Francois
Published: June 2020

There were several phases of Alpine metamorphism in the Vanoise region of Savoy, France. Certain early-formed minerals (garnet, glaucophane, and lawsonite) were unstable in the later metamorphic phases. Only pseudomorphs after lawsonite remain. Lawsonite is considered to have been abundantly developed in the initial stages of metamorphism, probably at shallower depth than the zone with epidote and garnet. The glaucophane-lawsonite subfacies thus existed in the upper Maurienne as in other regions that were subjected to Alpine orogenesis and metamorphism.
Sur l'existence de diverses phases de plissements alpins dans l'ile de Majorque (Baleares)
Authors: Escandell Bartolome , Colom G.
Published: June 2020

Evidence of a Burdigalian (Miocene) phase of folding has been found in Majorca (Balearic islands, Spain); formerly only intra-Oligocene and post-Burdigalian (paroxysmal) phases have been known. The trend of tangential pressures varied widely, even within a given phase. Detailed study of the Alcudia peninsula shows that an east to west pressure was responsible for the Burdigalian folds. Other trends are from southeast to northwest and from southwest to northeast.
Sur la structure du Secondaire et du Nummulitique des environs de Malaga (Espagne)
Authors: Azema Jacques
Published: June 2020

Revision of the stratigraphy of Mesozoic and Nummulitic (Tertiary) deposits forming the sedimentary cover of the Paleozoic complex in the Malaga region, Spain, shows that there has been considerable faulting. Both stretching and the development of thrust slices have caused dislocations in terrain previously considered to have been undisturbed.
L'evolution du magmatisme dans le geosynclinal dinarique au Mesozoique et au Cenozoique
Authors: Ciric Branislav , Karamata S.
Published: June 2020

The inner and outer zones of the Dinaric Alps of Yugoslavia are compared. With the exception of Triassic porphyrites and quartz porphyrites and small upper Cretaceous rhyolite masses, the outer zone has few igneous rocks. The inner zone, however, was the scene of more extensive magmatic activity, represented by lower and middle Triassic porphyrites, Jurassic gabbros, melanophyres, and diabases, Oligocene and Pliocene granodiorites, andesites, dacites, and quartz monzonites, and late Pliocene andesites, basalts, and leucite basalts.
Essai sur l'ensemble italo-dinarique et ses rapports avec l'arc alpin
Authors: Aubouin Jean
Published: June 2020

Both the Apennine and Dinaric systems are eugeosyncline-miogeosyncline couples. The eugeosynclines are internal and contain ophiolites and early Flysch deposits; they were involved in orogenesis as early as the Cretaceous and were often overthrust outward. The miogeosynclines are external and contain no ophiolites. Their Flysch deposits are younger (late upper Cretaceous-Eocene), were involved later in orogenesis, and remained autochthonous. The Italo-Dinaric system is centripetal with respect to the Apulian fold structure. As a whole, it has moved longitudinally toward the northwest; Italo-Dinaric zones are found on the flanks of the east Alps (southern Alps) where they exhibit periclinal "closure."
Extension verticale des alethopteridees et formes voisines dans le bassin du Nord et du Pas-de-Calais
Authors: Buisine Michel
Published: June 2020

On the basis of examination of several hundred newly collected specimens of Carboniferous Alethopteridea and revision of previously collected material from the Nord-Pas-de-Calais coal basin, France, the vertical ranges of different species (Alethopteris, Lonchopteris, and Pecopteridium) are established precisely. The vertical distribution of these forms indicates that the coal measures of northern France can be divided into two major zones, with their boundary a little above the Rimbert marine horizon.
Etude palynologique de quelques echantillons de schistes autuniens
Authors: Doubinger Jeanne
Published: June 2020

Palynologic study of the Veurotte (Stephanian D) and Muse (lower Autunian) shales of the Autun-Epinac Permo-Carboniferous basin (Saone-et-Loire, France) reveals the persistence of the "coal measures palynologic facies" in sediments containing the first representatives of Callipteris, and the existence of an "Autunian facies" that already includes some typically Permian elements.
Stratigraphie et tectonique du bassin houiller de Montvicq (Allier)
Authors: Freytet Pierre
Published: June 2020

The Montvicq coal basin (Allier, France) was formed by infilling of a small mountain lake by detrital Carboniferous sediments characterized by a deltaic facies. A basal conglomerate is overlain successively by sandstones, shales, and coal beds. The southern part of the basin has subsided, and andesite flows are interbedded in the middle of the series. Later orogenic activity caused tilting of the southern margin and subdivision of the sedimentary basin into two structural depressions separated by a faulted and locally folded east-west- trending anticline.
Sur la structure des sigillaires
Authors: Lemoigne Yves
Published: June 2020

The structure of sigillarian stems and the relations between internal structure and surface impressions have been studied. Three hypotheses of the development of sigillarians, which have been advanced to explain the absence of zoning, are discussed, and it is concluded that loal conditions modified the effects of seasonal changes.
Sur la flore autunienne du detroit de Rodez; note preliminaire
Authors: Vetter Pierre
Published: June 2020

Lists the Autunian (Permian) plants found at three localities in the area of the Rodez strait (France). The abundance of Lebachia fragments and of estherians resembling Estheria tenella in the fine bluish shales is typical of the Autunian in the region.
Esquisse geologique de la bordure occidentale de la plaine d'Argos (Peloponese, Grece)
Authors: Dercourt Jean
Published: June 2020

On the southeastern margin of the Argos plain, Peloponnesus, Greece, a neritic limestone series, the Aspis series, is thrust over the Pindus nappe; along the western border and elsewhere, the plain is bounded by the nappe. Erosion of a window has exposed autochthonous formations and the metamorphic basement. The structural relations between the different series are examined, and the different phases of tectonic activity that have affected the sedimentary formations are outlined.
Manifestations de desquamation observees en Rhodesie du Sud et en Haute-Egypte
Authors: Dubertret Louis
Published: June 2020

Processes of exfoliation in Southern Rhodesia have differed from those in upper Egypt. In the granitic upwarps of the former, curved layers up to hundreds of meters long and 8-10 meters thick are exfoliated. The process is attributed to progressive release of internal stress during erosion. In Egypt, the edge of the Nubian sandstone plateau scales off in sheets dipping at angles of 60 degrees. As the sandstone is only slightly cemented, the process is attributed to gravity settling.
Nouvelles observations sur la serie de la Gara Sayada (bordure nord-est de l'Eglab, Sahara occidental)
Authors: Dourthe Pierre , Serra O.
Published: June 2020

A subhorizontal sandy series, the Gara Sayada series, some hundreds of meters thick, overlies a folded sandstone-shale series, more than 1,000 meters thick, on the north-eastern margin of the Eglab massif (Algeria) in the western Sahara. The intra-Caradocian (Ordovician) unconformity already known at several other localities in the Sahara is thus also represented in this region.
Les affleurements de "series intermediaires" dans la region de Silet (Ahaggar occidental, Sahara central)
Authors: Gravelle Michel
Published: June 2020

Poorly fossiliferous detrital and volcanic beds of the so-called "intermediate series" outcrop in the eastern part of the Pharusian (Precambrian) trough in the western Ahaggar mountains and on the western border of the Suggarian (Precambrian) horst of the central Ahaggar mountains (Algeria) in the central Sahara. They are unmetamorphosed or only slightly metamorphosed, and rest unconformably on either the Pharusian schists or on Suggarian granite. Their relationship to the Cambro-Ordovician cover is not known, for in this area the latter consists only of a few scattered buttes. The intermediate series can be distinguished easily from the Tassilian sandstones and conglomerates on the basis of lithology and structure. There are some similarities to the Nigritian of the Adrar des Iforas region, but in the absence of paleontologic evidence and absolute age determinations, correlation even between closely spaced outcrops is purely hypothetical.
Le horst suggarien de Timg'aouine
Authors: Bouvet Michel , Reboul C.
Published: June 2020

The north-south fault along the 4 degrees 50' meridian is one of the major structural trends of the Ahaggar mountains, Algeria. It separates Suggarian (Precambrian) deposits on the east from Pharusian (Precambrian) deposits on the west. A north-northeast-south-southwest- trending horst, the Timg'aouine horst, about 120 kilometers long and averaging 15 kilometers in width, lies west of the fault. Large lava flows are associated with the faults bounding the horst. The presence of this Suggarian unit played an important role in the structural development of the surrounding Pharusian basin.
Decouverte de Monograptus hercynicus (Perner) dans les chaines d'Ougarta (Algerie)
Authors: Legrand Philippe
Published: June 2020

Three classic stratigraphic sections at the Silurian-Devonian boundary have been established in the Saoura region in the Ougarta mountains, Algeria. The presence of Monograptus hercynicus in these beds, which probably are younger than those yielding trilobites with Devonian affinities, throws light on the problem of the Silurian-Devonian boundary in the Sahara and in Europe.
Ostrea offreti Kilian 1889 du Miocene circummediterraneen
Authors: Lecointre Georges , Ranson G.
Published: June 2020

Almost all pelecypods from Miocene localities of the Mediterranean region which have been assigned to Ostrea boblayei should have been assigned to O. offreti instead. The type specimen of O. boblayei is actually only a very fine example of O. lamellosa. O. offreti is apparently the Miocene form, O. lamellosa the Pliocene form.
Madreporaires du Devonien du Chenoua (Algerie)
Authors: Semenoff-Tian-Chansky Pierre , Lafuste J. , Durand Delga M.
Published: June 2020

Describes the madrepores (including Pachyphyllum chenouensis n.sp.) of a Devonian coral fauna from the Chenoua promontory at the western end of the Kabylia massifs of Algeria. For the most part the fauna comprises more species known from western and central Europe and the USSR than species described from the Sahara and Morocco. The madrepores indicate a Givetian-Frasnian age for the enclosing beds, which probably represent the boundary between the two stages.
Les roches filoniennes basiques de la rade de Brest; kersantites et dolerites
Authors: Metais Danielle
Published: June 2020

The Brest harbor region, western Brittany, France, is located in a synclinorium of Devonian sedimentary rocks, bounded on the north and east by granite and gneiss and cut by numerous bodies of igneous rocks ranging in chemical composition from acidic (microgranite) to basic (dolerite and lamprophyre). Three types are distinguished among the basic rocks--pyroxene-poor dolerite, dark-colored pyroxene kersantite, and light-colored micaceous kersantite. They are considered to represent a continuous petrogenetic sequence.
Les dissolutions de gypses anteludiens dans le centre de l'Ile-de-France et leurs dangers pour les constructions
Authors: Soyer Robert
Published: June 2020

An elliptical pressure-arch cavern in gypsum interbedded in the St. Ouen limestone and marl of Ledian (upper Eocene) age was discovered in 1960 by workmen repairing the pavement of a street in Paris, France. Caverns and collapsed galleries are well known in the overlying gypsum of Ludian (upper Eocene) age, but this discovery demonstrates their existence in the St. Ouen limestone-marl, and also possibly in the Beauchamp and Monceau sandy and gravelly marls. Exploratory drilling is required prior to construction involving any of these strata in which subterranean solution caverns in gypsum might occur.
Niveaux a algues dans le Thanetien des Pyrenees (Corallinacees, Solenoporacees, Squamariacees, Incertae familiae)
Authors: Segonzac Genevieve
Published: June 2020

Microscopic study of Corallinaceae algae previously described from the Thanetian (lower Eocene) of the Pyrenees shows that 34 of the species belong to existing species, and only 21 are actually new species. Although these algae are quantitatively important in the region, the generally poor state of preservation made identification difficult.
Trilobites devoniens de la partie occidentale de la zone axiale pyreneenne
Authors: Mirouse Raymond , Pillet Jean
Published: June 2020

The Devonian begins in the western part of the axial zone of the Pyrenees as a detrital series of pelite, sandstone, and some limestone. The series, known in the vicinity of the Aubisque, Soulor, and Pourtalet passes, has been correlated with Coblentzian (lower Devonian). The trilobite genera Phacops, Odontochile, and Asteropyge are present in these strata. None of these recognized forms is truly early Devonian. They characterize the base of middle Devonian, thus the age of the strata must be changed to Eifelian (lower middle Devonian).
Les ecailles de Combecave, pres de Cabasse (Var)
Authors: Castor Emile , Mennessier Henri L. , Mennessier G.
Published: June 2020

Underground workings of the Combecave mine in the Issole river valley in Provence, southeastern France, show complex imbricate structure under the Vins thrust fault. Rocks in the mine are principally lower and middle Jurassic limestones and masses of bauxite. The bauxite was disharmonious in the deformation, and formed tongue-like masses in the faulted limestone.
Contribution a la stratigraphie du Cambro-Ordovicien dans le bassin saharien occidental
Authors: Legrand Philippe , Nabos Genevieve
Published: June 2020

Lithostratigraphic study of cores in the vicinity of Hassi Messaoud and Oued Mya, Erg el Anngueur, and Fort Miribel (Algeria) has resulted in the description of a type section for the Cambro-Ordovician series in the western Sahara which includes five stratigraphic units. The lower Cambrian is represented by the Hassi Messaoud sandstone group, overlain by the Cambrian-Ordovician Isometric sandstone formation. The Ordovician is represented by the Tremadocian lower argillite formation and the lower Arenig intermediate quartzites. In the Erg el Anngueur area a shale-sandstone complex overlies the lower argillites The Ol.1 sandstone is transgressive on the stage below and is overlain by the upper argillite formation and the terminal sandstone-shale complex which represent undifferentiated Arenigian-Llanvirnian. A brief outline of the paleogeographic aspects of the region is discussed in relation to each unit.
Sur la presence de l'Eocene dans les calcaires superieurs de l'Olympe (Thessalie septentrionale, Grece)
Authors: Godfriaux Ivan
Published: June 2020

The presence of nummulites--?N. millecaput--and other foraminifera in the uppermost limestones of Mt. Olympus (Greece) indicates that the limestone series extends from the Triassic into the Eocene, probably Lutetian. Sandy-shaly flysch concordantly overlies these limestones. Since the limestones show effects of the orogenic movements which disturbed the internal zones of the Hellenides, the Olympus folding is attributed to the upper Eocene. It is concluded from this that Mount Olympus was emerged at the beginning of the Eocene and escaped the invasion of terrigenous material from adjacent regions.
Nouvelles donnees sur la stratigraphie du Primaire des environs d'Ainhoa (Basses-Pyrenees)
Authors: Drot Jeannine , Lagny Philippe , Sagon Jean Paul
Published: June 2020

Discovery of a fossiliferous horizon in the Anhoa area of the Basses Pyrenees of southwestern France dates as Siegenian or Emsian (lower Devonian) a formation underlain by a shale-sandstone series whose age has been considered either Silurian or Dinantian (Carboniferous). The normal contact with the overlying Devonian rules out a Dinantian age for the shale-sandstone series. The Devonian seems to be transgressive upon the series, indicating a lacuna. Comparison with other localities in the Basque Pyrenees suggests a Caradoc (Ordovician) age for the series.
Contribution a l'etude geologique des guelb Bou Leriah (region d'Aoucert, Sahara Espagnol)
Authors: Sougy Jean
Published: June 2020

A Paleozoic autochthon in the Bou Leriah-Aoucert area of the southern Spanish Sahara comprises Ordovician (?) sandstone and quartzite, Silurian limestone, and a lower Devonian series of alternating shale, sandstone, fossiliferous limestone, and phosphate beds. The autochthon is progressively more folded toward the west, and becomes increasingly fissured and brecciated upward with approach to the mylonitized gliding zone. The overlying allochthon is sericitized quartzite and schist of undetermined age. The tangential tectonic deformation is post-lower Devonian, and probably is Frasnian (upper Devonian).
Les cephalopodes cenomaniens des environs de Jerusalem
Authors: Avnimelech Moshe A. , Shoresh R.
Published: June 2020

Describes ammonites (including Utaturiceras bethlehemensis n.sp.) and nautiloids from Cenomanian (Cretaceous) deposits in the vicinity of Jerusalem, Israel. The fauna permits recognition of four zones in the Cenomanian section.
La depression d'Ensues (Bouches-du-Rhone) et ses environs; details de structure
Authors: Humbert Simone
Published: June 2020

The Ensues depression is one of a series of Aptian (Cretaceous) depressions along the axis of the Jurassic-Cretaceous anticlinal structure of the Nerthe range, northwest of Marseilles, France. Details of its structure are described, and it is concluded that the depressions are not tectonic windows, but the product of downfaulting accompanying flexuring.
Le Brioverien superieur (X3) aux environs de Granville (Manche)
Authors: Roblot Marie Madeleine
Published: June 2020

Study of outcrops at different localities shows that the succession of upper Brioverian deposits in the Granville area, Normandy, France, comprises, from the base upwards, tillites, varved shales, coarse sandstones, and deposits of the Laize stage.
Considerations paleogeographiques sur la patrie supposee des nappes de Flysch a Helminthoides des Alpes et des Apennins
Authors: Lanteaume Marcel
Published: June 2020

Paleogeographic questions are posed by an original connection between the Helminthoides flysch of the Maritime Alps and the Apennines. A vast middle and upper Cretaceous flysch and scaglia pelagic sedimentary trough, the Genoese-Tuscan basin, is discussed. It is concluded that the detritus that filled the basin came from two bordering crystalline massifs. The upper Cretaceous paleogeography of the Italian and Dinaric Alpine region is reconstructed.
Lignes et problemes tectoniques du secteur nord-ouest de l'Apennin septentrional
Authors: Boni Alfredo
Published: June 2020

Thirty structural sections in the northern Apennines (Italy) are described and discussed with reference to the tectonic forces that acted upon them. Deformations from pre-Tortonian through upper Miocene and probably into the Pliocene oriented structures in such a way that present strike directions are indicative of identifiable stages of movement. The study leads to the conclusion that nappes are the result of overthrusting rather than gravitational sliding.
Les phases tectoniques neogenes de l'orogenese alpine dans l'Apennin septentrional
Authors: Giannini Enzo , Tongiorgi Marco
Published: June 2020

Tectonic activity in the northern Apennines (Italy) is traced from the Oligocene to the Pliocene. The paroxysmal phase, extending from the middle Oligocene into the Aquitanian, was marked by positioning of the Tuscan and Ligurian nappes, shrinking of the crust, and folding of the autochthon. The present general topography of the northern Apennines can be attributed to activity during this phase. During the upper Tortonian second phase, movement was renewed and the two nappes assumed their present positions. The third phase, during the lower Pliocene, was marked by limited gravity sliding.
Donnees nouvelles sur la tectonique tertiaire des massifs calabro-lucaniens
Authors: Grandjacquet Claude
Published: June 2020

Tertiary gravity sliding of the north Calabrian sedimentary series in Italy is considered with reference to a system of large displacement thrust faults, and to facies change between western siliceous sediments and eastern reef sediments. The eastward sliding of the nappe is traced until it collided with the north Calabrian massifs and was split. One part slid onto the coastal chain and central Calabria; the other pushed the Calabro-Lucanian massifs east and then north.
Observations sur la region de Longobucco (Italie meridionale)
Authors: Afchain Claude
Published: June 2020

The Longobucco area displays a secondary sedimentary basin transgressive on a granite-phyllite basement. The sedimentary sequence begins with lower Jurassic quartzose conglomerate containing granite and phyllite. The conglomerate is overlain by a homogeneous calcareous marl which forms a large part of the basin and has been divided into lower, middle and upper Liassic (lower Jurassic) by dating with brachiopods, pelecypods and cephalopods. The middle Jurassic consists of red limestones of the Torrente Colognati valley. Cretaceous rocks are not present, probably because of erosion rather than non-deposition. Tertiary rocks begin with either the Paleocene or Eocene as evidenced by the abundance of Distichoplax in the microfauna.
Les arcs calabro-siciliens et les relations entre Afrique du nord et Apennin
Authors: Caire Andre
Published: June 2020

A clarification of the paleogeographic relationships between the Berber mountain system of north Africa and the Apennines is related to a study of structural trends in southern Italy and Sicily. In the Peloritani mountain area of southern Sicily, Alpine age structures describe arcs opening to the northwest and are a transition from the E-W trend of the Berber and the Apennine trend. The WNW-SSE trending Catanzaro zone at the northern end of the arcs represents a zone of probably lower Miocene displacement. Prior to the Oligocene paroxysm, certain facies were common to western Calabria and the southern Apennines and it is assumed that they were deposited in a single continuous basin. Cretaceous flysch and nummulitic facies differences between north Africa and the Apennines are explained through introduction of varied sources for the sediments of the two areas.
Association de Chitinozoaires sahariens du Gothlandien superieur (Ludlowien)
Authors: Taugourdeau Philippe
Published: June 2020

Twelve Chitinozoa species (genus Ancyrochitina, Angochitina, Conochitina and Desmochitina) recovered from well samples near El Golea in the Sahara, are briefly described. They have been dated by the associated macrofauna as Ludlovian.
Prelude a une typologie des massifs granitiques
Authors: Pavillon Marie Jose , Routhier Pierre
Published: June 2020

Based on their chemical and chronologic characteristics the granitic rocks of massifs are classified in two groups: syntectonic and late tectonic granites of the first phase; and extensively fractured, with coal deposition and later mineralization of the second phase. A structural analysis of the Meymac region (central French massif) is used as an example as it represents a granitic pluton, with continuous evolution resulting in a zonal distribution of the minerals and formations. The typological determination of granitic massifs requires specifically defined terminology, and metalliferous deposits must be differentiated. Examination of the granitic facies reveals four types of massifs: massifs with porphyritic granite associated with medium-grained non-porphyritic granite; massifs with porphyritic granite containing fine-grained granite bodies; massifs of coarse-grained, non-porphyritic granite; and massifs of varied facies disposed in an irregular manner. Typology seems to be a possible beginning in the study of the dynamics of deepseated petrogenesis.
Les transferts d'echelle en geologie et geophysique. Application a la Mediterranee occidentale et aux chaines peripacifiques
Authors: Glangeaud Louis
Published: June 2020

The problem of scale changes in geology and geophysics is discussed as they affect the methods, concepts, and axioms of structural studies on a megametric scale. This is necessary for the construction of megametric and geonomic tectonic maps and in defining the basis of paleophysics. Geodynamics can be applied to the large scale problems of chronologic correlation. The classification and megadynamics of crust and mantle are discussed in terms of data and methods, megametric and geodynamic mechanics, submarine morphology, and marginal zones. Recent deformation of the internal and peripacific regions is described. Bimarginal structures of the Caribbean and Mediterranean types are considered. Structures existing on a megametric scale and the phenomena linked to them represent the transition between the kilometric scale of geology and the geonomic and astronomic scale of geophysics.
Les Miogypsinidae de deux coupes profondes des Landes
Authors: Bielle Mariette , Caralp Michelle
Published: June 2020

The study of Oligocene and lower Miocene formations in two borings in Landes (Arjuzanx and Tartas-Cellulose I) is based on the Miogypsinidae. The distribution of the different genera and species has permitted the distinction of five successive faunal groups. The stratigraphic position of these groups is determined on the basis of results from an earlier study of the Oligocene and Miocene of Aquitaine. Several specimens close to Miogypsinoides dehaartii (van der Vlerk) and Miogypsina borneensis (Tan Sin Hok), but different in certain respects, are described and illustrated.
Quelques nouvelles especes sparnaciennes de pollens et spores
Authors: Gruas-Cavagnetto Carla
Published: June 2020

Over a dozen new species and varieties of bryophytes, pteridophytes, and angiosperms are described from the Sparnacian (Eocene) microflora of the Paris basin.
Morphologie du substratum de l'Etang de Berre
Authors: Leenhardt Olivier , Roux Max Robert
Published: June 2020

A continuous seismic profile has shown that the Berre lagoon (Bouches-du-Rhone, France) comprises two depressions, cut in the upper Cretaceous or Miocene substratum, which are filled by sediments giving variable reflections. The depressions may have formed as a result of two Ponto-Pliocene erosional cycles succeeded by an influx of mixed detritus in the Quaternary.
Contribution a l'etude de la region de la montagne d'Arree
Authors: Lucas Gabriel , Lang Jacques , Le Vot Bernard
Published: June 2020

Arree mountains, France, structural geology, central dome of Ordovician formations, lower Devonian epizonal schists and quartzites, post-Namurian (Carboniferous) faulting
L'orientation des micas dans les schistes cristallins de l'aureole du massif granitique de la Sila (Calabre centrale)
Authors: Dubois Roland
Published: June 2020

Mica, three axial directions in schists, possible regional structural reconstructions, Italy
De Kymi a Eretria; geologie d'une partie de l'Eubee (Grece)
Authors: Guernet Claude
Published: June 2020

Kyme-Eritrea area, geologic survey, Paleozoic-Quaternary formations, lateral facies variations, volcanism
Succession de faunes dans le Tithonique superieur et le Berriasien du Djebel Nara (Tunisie centrale)
Authors: Memmi Lucia
Published: June 2020

Ammonite faunas, Jurassic-Cretaceous, biostratigraphy, Jurassic-Cretaceous boundary, correlations
Sur la structure des monts de la Mina (Tell oranais, Algerie)
Authors: Delteil Jean
Published: June 2020

Tell ridge, structure, thrust faulting, Cretaceous and Eocene rocks in fault contact with autochthonous Miocene rocks, possible reconstruction of tectonic history
Analyse stratigraphique et structurale du flysch de Penthievre (Nord du Constantinois, Algerie)
Authors: Neumann Madeleine , Vila Jean Marie
Published: June 2020

Cenomanian (Cretaceous) to upper Oligocene, lithology, fauna, superimposed thrust sheets of Jurassic-Eocene formations
La microfaune actuelle et subrecente d'une carotte atlantique (golfe de Gascogne); observations ecologiques et climatiques
Authors: Caralp Michelle , Moyes Jean , Vigneaux Michel
Published: June 2020

Arctic and boreal foraminifera and ostracods, cold current, upward change from cold to temperate assemblages as an indication of Quaternary glaciation, France
Epirogeneses ponto-plio-quaternaires de la marge continentale franco-italienne du Rhone a Genes
Authors: Glangeaud Louis
Published: June 2020

Epeirogenic stages, transgressions, mantle-crust processes
Scolecodontes du Siluro-Devonien du Cotentin
Authors: Taugourdeau Philippe
Published: June 2020

Systematic descriptions, two new species, France
Eocene superieur et Oligocene de Pereal (La Debruge-Sainte-Radegone, pres Apt, Vaucluse)
Authors: Truc Georges , Demarcq Gerard
Published: June 2020

Lithostratigraphy, lateral facies variations, lignitic beds, vertebrate fauna, Eocene-Oligocene boundary, Ludian (Eocene), France
Sur la presence de l'echinide regulier Phymotaxis vidali (Cotteau 1892) dans l'Aquitanien des environs de Marseille
Authors: Humbert Simone
Published: June 2020

Morphologic description, affinities, rocky littoral environment, Miocene, France
Precisions sur le gisement vindobonien du chemin de la Coulade a Rognes (Bouches-du-Rhone)
Authors: Arnaud Michel , Catzigras France
Published: June 2020

Continental Helix sandstones, angular unconformity on Helvetian marine deposits, late Miocene emergence, France
Les rapports de l'Oligocene avec les structures N-S du Nord-Varois
Authors: Touraine Fernand
Published: June 2020

Pre-Sannoisian tectonic expansion, post-Stampian? tectonic compression, marine troughs, Barjols horst (Triassic), France
Preuves de la transgression vindobonienne sur la crete de la montagne de Sainte-Victoire (Bouches-du-Rhone)
Authors: Rousset Claude
Published: June 2020

Terra rossa, mineralogy of sand fraction, paleogeography, tectonics, Miocene, France
Sur la tectonique postmiocene entre Lambesc et Pelissanne (Bouches-du-Rhone)
Authors: Colomb Emile , Gervais Jean , Rouire Jacques
Published: June 2020

Terminal Tortonian (Miocene) reactivation of pre-Miocene faults, consequent overthrusting, France
Note preliminaire sur les argilites du Haut-Var
Authors: Neau Guy
Published: June 2020

Boehmite-bearing bauxite deposits, facies distribution, Eocene erosion of preexisting bauxite deposits, France
Mode de mise en place des laves acides de l'Esterel (Var)
Authors: Boucarut Marc
Published: June 2020

Preliminary emission of magma rich in volatile material (ignimbrites), subsequent emplacement of potassium-rich rhyolitic magma, terminal phase of microlitic rhyolitoid magma, Permian, France
Les trilobites mesocambriens de Clere-sur-Layon (Massif armoricain)
Authors: Cavet Pierre , Gruet Michel , Pillet Jean
Published: June 2020

Systematic descriptions, middle Acadian, France
Etude de la composition 18O/16O de quelques eclogites: consequences petrologiques et geophysiques
Authors: Javoy Marc , Allegre Claude J.
Published: June 2020

Temperature and pressure of formation, intermediate between granitic and extrusive rocks, basal crustal zone below granites and anatexites
Etude des facies d'une dune gypseuse (sud d'Oran, Algerie)
Authors: Trichet Jean
Published: June 2020

Continuous solution and redeposition of gypsum, soil characteristics, lenticular dune deposits, granulometry, Quaternary
Observations tectoniques dans le Pacifique (Hawaii, Tahiti, Nouvelles-Hebrides)
Authors: Geze Bernard
Published: June 2020

The Pacific islands of the Hawaii, Society, and New Hebrides groups are characterized by curvilinear faults resulting from peripheral subsidence slippage of portions of the islands toward the ocean deeps. The curvilinear faults are the sites of volcanic manifestations, particularly at junctions with other faults. Faults of the Hawaiian islands (Kilauea, Mauna Loa, and Mauna Kea volcanoes) and Maui (Haleakala) are concave to the southeast. The great curved fault of Oahu and Molokai is concave to the north. Faults in the islands of Moorea and Tahiti of the Society group are concave northward. Faults in the New Hebrides, on the contrary, are concave to the southwest, as are those in the Solomon and New Britain islands. Alpine structure in embryonic form thus is prolonged from the Himalayas and East Indies to the New Hebrides.
Sur une roche de nature lamprophyrique dans la region de Saint-Bresson (Haute-Saone)
Authors: Guintrand Yves , Metais Danielle , Thiebaut Jean
Published: June 2020

An apophysis of the Ballons granite at Saint Bresson in the Vosges of eastern France consists of a central mass of microgranite with a gradational border facies of lamprophyre. The two rock facies are chemically identical.