bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sur la position structurale et stratigraphique des 'gres de l'Embrunais', a l'ouest du col de Vars (Hautes-Alpes)
Authors: Kerckhove Claude 
Published: June 2020

Abstract
The Embrunais sandstone of the Crevoux peak massif, west of the Vars pass (France), is an internal, upper digitation of the Helminthoides flysch nappe of the Embrunais-Ubaye area. This digitation is characterized by its detrital facies which becomes more extensive and conglomeratic toward the northeast. The exotic sandy flysch outliers on the Brianconnais, near Briancon, are related to this digitation. West of the Vars pass the Crevoux massif overlies the basal black flysch. Southwest of the pass the black flysch has drifted over the rumpled Helminthoides flysch. The Crevoux massif therefore represents an allochthonous unit superimposed on the Saint Clement and Meyronnes folds. In this syncline the Embrunais sandstone develops progressively from south to north, emplacing itself in the basal Helminthoides flysch. Santonian-Coniacian Inoceramus species collected from the beds directly above the Embrunais sandstone date the unit as Senonian or possibly Turonian.
L'unite du Rio Guardal (prov. de Grenade, Espagne) et les liaisons entre prebetique et subbetique
Authors: Foucault Alain 
Published: June 2020

Abstract
The deep valley of the Guardal river in southeastern Spain exposes an unusual interlayering of typical Subbetic and Prebetic facies indicating a much closer relationship between the two zones of sedimentation in the region than previously assumed. The Subbetic beds are analogous to beds of the same age in the Malaga nappe, and probably are equivalent. Previous difficulties in explaining the stratigraphy and structure of the region are avoided by this interpretation, and the presence of Aptian (Cretaceous) flysch in the section is understood.
Sur quelques aspects de la zoneographie alpine dans les Alpes cottiennes meridionales
Authors: Michard Andre 
Published: June 2020

Abstract
A Permo-Carboniferous series and a polymetamorphic series are distinguished in the rocks of the southern Cottian Alps, Italy. The metamorphic mineral assemblages and facies of the principal rock types represented in each series and their zonal distribution are discussed. Alpine metamorphism is considered to have occurred after the tectonic activity responsible for superposition of the three structural units recognized in the region between Varaita and Stura.
Les sables et argiles bigarres du Coulon et ceux du Garry dans la region d'Apt (Vaucluse)[with discussion]
Authors: Clauzade Georges , Roch E , Tamisier A. 
Published: June 2020

Abstract
A Cretaceous (rather than Eocene) age is postulated for multicolored sands and clays of the Coulon and Garry areas in the Apt region, France. Conditions of deposition are considered to have been essentially continental, although in initial stages they may have been marine. Source materials were locally derived, as distinct from the contemporaneous bauxitic deposits of Provence, whose constituent materials were derived from the Central Massif and other distant sources.
Observations sur la tectonique des environs de Plaisians (Drome)
Authors: Grolier Jacques , Letourneur J. 
Published: June 2020

Abstract
A Barremian (Cretaceous) landslide mass now forming a butte, an intraformational truncated zone of Barremian limestones, and other tectonic elements of the Plaisians region, France, are discussed with reference to the mechanism of processes responsible for their present structural position.
Successions caracteristiques et niveaux reperes dans le Paleozoique de la region de Carcassonne a Saint-Pons (Montagne-Noire, Aude, Herault)
Authors: Boyer Francois 
Published: June 2020

Abstract
The lower Cambrian deposits of the Carcassonne-Saint-Pons region, France, are characterized by similar sequences of lithologic units at widely spaced localities and by lithofacies marker horizons which are persistent over wide areas. Lithofacies analyses of other parts of the Paleozoic section in the region lead to the conclusion that the region constitutes a homogeneous tectonic unit.
Sur les "gres rouges" du Cretace moyen de Dieulefit et des regions voisines (Drome)
Authors: Porthault Bernard 
Published: June 2020

Abstract
Red sandstones in the zone between flint-bearing limestones generally attributed to the Turonian and paleontologically dated upper Cenomanian (Cretaceous) deposits of the Dieulefit region, France, are dated as lower Turonian (Saumurian) and lower middle Turonian (lower Angoumian), mainly on the basis of the Globotruncana microfauna. A stratigraphic gap occurs between the upper Cenomanian and the base of the red sandstone, which reflects the effects of pre-Senonian orogenic activity.
Le Nummulitique du Devoluy (Hautes-Alpes); relations avec les regions voisines
Authors: Dubois Roland 
Published: June 2020

Abstract
The Nummulitic deposits of the Devoluy massif in the French Alps have generally been assigned to the Oligocene. Microfaunas show that the basal deposits in the sequence are upper Lutetian-Priabonian (Eocene). The stratigraphic and structural implications of the age assignment are discussed.
Evolution de la fosse mio-pliocene de l'Apennin apulo-campanien (Italie meridionale)
Authors: Jacobacci Alfredo 
Published: June 2020

Abstract
The description and schematic representation of the evolution of two rift valleys in the region between the Taburno mountain, west of Benevento, and Gargano to the east, based on surface studies and the results of deep drilling in Foggia, is aimed at the resolution of problems relating to the structural interpretation of relationships between Miocene and Pliocene sediments of southern Italy. The great variation in thickness and facies of sedimentary beds of equivalent age is noted, and the evidence of reworked sediments within the basin is considered.
Quelques ammonites nouvelles du Cretace superieur d'Angola
Authors: Basse de Menorval Eliane 
Published: June 2020

Abstract
A small new fauna of ammonites, Ledoceras massoni n. gen. n. sp., Prionocyclus, Subprionocyclus, Diplomoceras, from the center of the Cuanza basin of Cape Ledo, Angola, is described. Inocerames from the same fauna are too fragmentary to be described and named. The ammonites are assigned to the end of the Turonian or the beginning of the Coniacian. The addendum compares Ledoceras massoni n. sp. and Barroisiceras minimum.
Sur l'Ordovicien superieur du synclinal de Sees (Orne)
Authors: Pillet Jean , Robardet Michel 
Published: June 2020

Abstract
The discovery of new outcrops in the Ordovician of the Sees syncline (Orne) has disclosed the existence of a fossiliferous horizon. Among the trilobites collected is a new form of Phacopidellinae: Denckmannites praecursor n. sp. In addition, the stratigraphic study shows that the shale series above the horizon with Plaesiacomia brevicaudata and D. praecursor corresponds to the 'Grand May' sandy facies in the Ordovician of Calvados.
Gres a ciment calcaire et conglomerats quaternaires des alluvions anciennes de la Marne et de la Seine en amont de Paris
Authors: Michel Jean Pierre 
Published: June 2020

Abstract
Sandstones and conglomerates, both with calcareous cement, represent consolidated alluvium of the Marne and Seine rivers. The consolidated layers are considered to have resulted from the lateral circulation of CaCO &lt;sub&gt;3&lt;/sub&gt; -rich phreatic waters in a periglacial climate of the Quaternary.
Introduction a l'etude des terrains permo-houillers du detroit de Rodez
Authors: Cariou Leon , Fuchs Yves , Scemama Charles 
Published: June 2020

Abstract
Carboniferous-Permian (Stephanian-Saxonian) stratigraphy and paleogeography, structurally controlled lacustrine depositional environment, transgressive marine sediments, shallow-water fluvial deposits, France
Geologie littorale et sous-marine dans la region de Marseille; relations avec les structures de la Basse-Provence
Authors: Blanc Jean , Froget Claude , Guieu Gerard 
Published: June 2020

Abstract
Folding, subsidence, tilt blocks, submarine karst topography, emergent Quaternary deposits, tectonic-geomorphic-geologic zonation, Pliocene-Quaternary, France
Composition isotopique du soufre et probleme de la genese des galenes; contribution au debat syngenese-epigenese
Authors: Allegre Claude J. , Duchaylard Georges , Javoy Marc , Sarazin Gerard 
Published: June 2020

Abstract
Galena, sedimentary pyrite, S &lt;sup&gt;32&lt;/sup&gt; /S &lt;sup&gt;34&lt;/sup&gt; ratios, isotopic geochemistry of sulfur, experimental methods, isotopic fractioning, metallogeny
Contribution a l'etude du Cambro-Ordovicien des chaines d'Ougarta
Authors: Gomes Silva Michel , Pacaud Michel , Wiel Francis 
Published: June 2020

Abstract
The Ougarta chain near Beni Abbes in western Algeria is a junction zone of unusual importance in regional stratigraphic correlations. The Ougarta sandstone series, exposed in an anticline from near Zerhamra southeast to Kerzaz, has several discordances within it. Its division into the following seven formations is proposed. The Sebkha el Melah arkosic sandstone, unconformable upon the rhyolite-metamorphic sole, and the overlying An en Nechea quartzite probably are lower Ordovician instead of Cambrian. The five remaining formations, the Foum Tineslem shale, the Kheneg el Aatene quartzitic sandstone, the Foum es Zeidiya shale, sandstone, and lenticular sandy limestone, the Bou M'Haoud ferruginous sandstone and shale, and the Djebel Serraf conglomerate, shale, and sandstone contain lower Ordovician faunas.
Etude petrographique du siderolithique du Lot (gisement de Saint-Martin-le-Redon) (confins du Perigord, de l'Agenais, du Quercy)
Authors: Deschamps Marc 
Published: June 2020

Abstract
A sink hole in Senonian limestone (southern Perigord, France) yielded a siderolithic deposit of Ludian age (upper Eocene) which consists of a series of poorly stratified clay, sandstone and multicolored sand with interbedded mineralized beds. Results of the petrographic analysis of thin sections made from these rocks show that percolating water attacked the ferromagnesian minerals, potassium silicates and sodic-calcic minerals, modifying their crystallographic texture, contributing to the formation of secondary minerals, and staining the rocks toward the base of the deposit. The consolidation of these minerals by polymorphic silica, itself attacked by the waters, suggests the possible existence of an essentially dry, tropical climate. However, the proportion of amphiboles in the arkoses is noticeably greater than in the sands, sandstones, and kaolinite deposits, thus ascribing a warmer, more humid aspect to the upper Eocene. Oxides are common at the base of the facies, which rests directly on Cretaceous limestones.
Style en plis couches et laminages dans le Paleozoique du Minervois (Montagne-Noire, Aude)
Authors: Boyer Francois 
Published: June 2020

Abstract
Reexamination of the three major structural zones in the Paleozoic units southwest of Montagne-Noire has resulted in a new interpretation of the tectonic aspect of their formation. The units strike WSW-ENE and disappear to the south where they are overlain by Tertiary deposits. They are limited to the north by an epimetamorphic series of undetermined age. The central unit is formed in lower Cambrian-Visean strata and comprises the Caunes syncline and Montbonous anticline. The northern unit, including the Cambrian Fournes and Lastours synclines and the Gotlandian-Devonian Citou and Ilhes synclines, is confined to a narrow band where the Caradocian is transgressive and unconformable on the Cambrian. The southern zone is restricted to the lower Ordovician Vexillum-bearing flysch. Orientation of numerous small recumbent folds on the flanks of the major folds indicates that the larger units are recumbent, overturned to the south. The middle unit is considered allochthonous since it is limited to the north and south by major tectonic disturbances and rests on a variable substratum. The existence of recumbent folding and allochthonous structures in an autochthonous area suggests that the tangential pressure exerted on the area south of Montagne-Noire originated from the north.
Tectonique de la region de Bobbio (Apennin septentrional, Italie)
Authors: Labesse Bernard 
Published: June 2020

Abstract
On the basis of field work and the results of recent stratigraphic studies, new interpretations are proposed regarding the orogenic phases which produced the overthrust structures in the Bobbio area, a region where the deeper units, exposed in a fenster, are younger than the surrounding higher units. In the Trebbia valley, proceeding north from Marsaglia, clays of the upper member of the Oligocene Bobbio unit are underlain by almost vertical beds of schistose pelitic clays, and then by sandstones, dipping 80-85 degrees . These two units belong to the macigno, the lower member of the Bobbio unit. It is concluded that the pelitic clay represents the lower of the two beds as there is no indication of their lateral equivalence or of a fault with horizontal separation in the order of 1000 m., a magnitude necessary if the clay were superimposed on the sandstone. The basal deposits of the upper Bobbio member are olistostromal, followed by the true clays. Existence of olistostromal elements suggests major intra-Oligocene movements, responsible for the structure of the macigno member. Limestones of the Penice mountain unit were overthrust on the Bobbio when the olistostromal elements were being deposited. The Arpiselle mountain unit is overthrust on the Penice and is in turn overridden by the Cretaceous Helminthoides flysch.
Contribution a l'etude du Quaternaire de l'Artois, region de Bethune
Authors: Bertouille Horace 
Published: June 2020

Abstract
The Quaternary deposits in the Bethune-Bruay-Allouagne-Chocques area are exposed on two hills composed of marine and continental (Ostricourt sands) facies of Landenian sands. The Ostricourt sands are overlain by a podzolic paleosol which underlies sandy loams and clays previously considered as Sparnacian. However, the presence of such periglacial phenomena as ice wedges and mammilliform sandstones in the podzols, and pergelisol pebbles in the loams and clays suggests that these deposits may actually be very early Quaternary. Overlying these deposits is a series of three soilflows alternating with paleosols, and separated from the Mindel-Riss interglacial by a hiatus. Eolian sands compose the Mindel deposits which are overlain by numerous soilflows of the Riss. The Wuerm is represented by three loess deposits sometimes intercalated with flows of leached rubble.
Les loess de Goderville (Seine-Maritime) et la stratigraphie du Quaternaire recent
Authors: Bordes Francois 
Published: June 2020

Abstract
The interpretation by Heinzelin (1961) of the Mousterian and Perigordian artifacts in the Goderville loess deposits (northern France) is not entirely acceptable. Five major points of difference are discussed. It is probable that two Wuermian stades existed before the upper Paleolithic began (35-40,000 yrs B.P.) rather than one as concluded by Heinzelin.
Les terrasses du confluent Loir-Sarthe et leurs industries
Authors: Gruet Michel 
Published: June 2020

Abstract
Five terrace levels can be recognized along the left bank of the Loir river between Angers and Villeveque (France). With the exception of a narrow band of Precambrian schists in the cliffs around Ecouflant, the terraces overlie a substratum of Cretaceous units. The highest terrace is predominantly a coarse sediment consisting of chert, sandstone pebbles, quartz and sand. The next lower terrace is distinguished by its coarse alluvium in which the sand grains show characteristics of eolian deposition. The oldest human remains in the area have been found in this terrace. The upper three-fourths of the third terrace is a light yellow, coarse alluvium washed down by the Loir river; the lower fourth consists of fine-grained, red sand with gravels containing Paleozoic fossils and granite boulders from the Sarthe. A human habitat is described from below this terrace. The next lower terrace consists of coarse Wuermian alluvium--elements as large as 17 cm. The lowest terrace is composed of fine Flandrian sands containing a molluscan fauna characterized by nanism of all the individuals and abundance of Valvata species. All the deposits except the Flandrian are characteristic cold climate sediments, probably deposited by the rapid fusion of snow accumulated on frozen ground incapable of absorption. A cross section illustrates the relative positions of the terraces as well as their characteristic features and the human industries represented in each.
Presence et extension d'un niveau marin littoral interglaciaire sur la cote du Medoc
Authors: Elha Henri , Prenant Andre 
Published: June 2020

Abstract
In the five sections studied along the Medoc coast (southwest France) the succession of sediments below the present high tide mark was constant: green plastic thick at the base of the cliffs Perigord below into micaceous sandy clay and then micaceous sand. Above the clays the sequence varied from section to section. Granulometric analysis shows that the top of the clays marks the limit between two radically different regimes: conditions of decreasing preceding depth and increasing preceding wave and current action below concretionary clay, and conditions corresponding to the rapid reduction in the constancy of the currents above the clay. Macro- and microfaunas collected from the sands are characteristic of extreme marine littoral conditions. The marked dip of the clays toward the sea, in contrast with the nearly horizontal nature of the overlying deposits, can be attributed to the withdrawal of the sea after deposition. The parallelism between the level studied and the present littoral zone, the pollen analyses, the absence of any marine erosion prior to the existing erosion, and the eolian character of the sand grains in all the sediments indicates that deposition occurred in a recent interglacial period. Cross sections, granulometric curves, and pollen diagrams are included.
Description d'une forme d'accumulation de gypse par voie eolienne dans le sud tunisien
Authors: Trichet Jean 
Published: June 2020

Abstract
Petrographic and chemical analysis of the gypsiferous dune sand formations in the northern part of the Djerid salt flat (Tunisia) gives an indication of the origin of the deposits and provides further proof of the intensity of the eolian forces in subdesert climates. Results of the study show that five elements were transported by the wind: lenticular and friable gypsum, quartz grains, sodium chloride, and aggregates of these. The lenticular gypsum was formed in a supersaturated salt solution (Djerid salt flat). The friable gypsum originated from the efflorescences at the surface of the flat, was transported by the wind, and then immobilized by increasing humidity and vegetation. The granulometry of the quartz grains and the rounded, worn character of the aggregates also indicate eolian transportation.
Donnees stratigraphiques complementaires sur le Jurassique moyen des synclinaux d'El Mers et de Skoura (Moyen-Atlas, Maroc)
Authors: Dresnay Renaud du 
Published: June 2020

Abstract
Subsidence of the El Mers and the Skoura synclines was suggested and data from echinoderms, pelecypods, brachiopods, and 25 ammonites support the idea and indicate that subsidence was slow and continual permitting the deposition of 3,000 meters of beds. The conditions of sedimentation of these deltaic deposits are similar to those of the dinosaur beds of Tendaguru in Tanganyika. The faunas are analogous to those of Arabia and Madagascar and are significant in studying the succession of faunas on the circumferences of the African-Malagasy continent.
L'Oligocene inferieur au sud de la butte Pincon (Seine). Presence du calcaire de Sannois
Authors: Cavelier Claude 
Published: June 2020

Abstract
The lower Oligocene Pincon strata lying between the Fontainebleau sands and the Pantin white marls--in comparison to the equivalent beds at Cormeilles, Sannois, and Orgement-- are analogous, especially in the development of the Sannois limestone. In general the marine beds decrease in thickness from west to east, generally at the expense of the basal beds. Continental strata thicken in the same direction.
Essai de geomorphologie du bassin superieur du Doulou (Aubrac sud-oriental): le glacier du Doulou
Authors: Rousset Claude 
Published: June 2020

Abstract
The upper Doulou basin (southern France) is underlain by garnet and staurolite mica schists covered in places by Rhaetian arkoses. Miocene lava flows are found on the higher elevations. Tertiary volcanism, Quaternary glaciation, and Recent and sub-Recent erosion have been the determining elements in the morphology of the area. Evidence of a glacial valley, drained by the Doulou river, has been found on the south flank of the Aubrac mountains. The valley was carved during the Rissian and was again glaciated in the Wuermian. The result of glacial and postglacial action has been the formation of the present basin of the Doulou which resembles a cluster of rivers diverging toward the southeast.
Essai de synthese stratigraphique du Paleozoique inferieur de la bordure septentrionale de la syneclise de Taoudeni (Sahara occidental)
Authors: Delpy Jacques , Trompette Roland , Villemur Jean R. 
Published: June 2020

Abstract
A tillite bed divides the lower Paleozoic of the northern border of the Taoudeni syncline into two unconformable series--the lower, or Infracambrian series and the upper, or Cambrian series. Recent studies involving the Infracambrian resulted in the recognition of three subdivisions. The lower, Char group, rests unconformably on the Precambrian basement. The middle, Atar group, is transgressive on the Char and is characterized by the development of carbonate intervals which contain stromatolites. The upper, Assabet el Hassian group, is transgressive on the Atar and contains fine sandstones, pelites, and argillites. These groups are recognizable from Atar (Mauritania) to the Algerian frontier.
Le groupe du Tasiast, nouvelle unite lithostratigraphique du socle antecambrien de la Mauritanie occidentale
Authors: Bonnici Jean Paul , Giraudon Robert 
Published: June 2020

Abstract
The Tasiast group in the extreme northwestern part of Mauritania is an igneous-sedimentary complex, 2000 m thick and regionally metamorphosed. The lithology, from top to bottom, consists of a gneiss with biotite and muscovite, upper amphibolites, ferruginous quartzites and itabirites, lower amphibolites, and migmatite granites. The upper absolute age limit of the group is 2600 m.y., obtained from lepidolite in a pegmatite. An age of 1850 m.y. was given by the migmatite granites. This group represents the crystalline schists previously divided into the Amsaga series and the Akjoujt series. The Tasiast group also crops out in Tijirit and Inchiri and may extend farther toward the east and north.
Les limites de la transgression miocene en Vautubiere (Jouques). Influences tectoniques
Authors: Rousset Claude 
Published: June 2020

Abstract
Miocene sedimentation in the northeast part of the Jouques basin was limited by the Vautubiere mountain. The Miocene deposits consist of transgressive marine sandstone and molasse overlain by lacustrine limestone and sandy limestone characterized by Helix christoli. This in turn is overlain by puddingstone and alluvium with cobbles of limestone and quartzite. The abundance of Helix suggests burial of complete populations from time to time under conditions similar to the present, but with a warmer climate.