bluuebunny/crossref_metadata_2025_split huggingface dataset:
Observations et hypotheses a propos des cailloutis eleves de Saint-Restitut (Drome) et de la Caume (Alpilles, Bouches-du-Rhone)
Authors: Demarcq Gerard 
Published: March 2020

Abstract
Reconstruction of the Pliocene paleogeographic setting of the Saint-Restitut and Caume plateaus, France, shows that the quartzite pebbles found on those heights cannot be Pliocene. It is suggested that they are pre-Plaisancian, dating from the continental period marking the boundary between the Miocene and Pliocene sedimentary cycles.
A propos de l'age de la serie du Miocene de Vence
Authors: Gohau Gabriel , Veslin J. 
Published: March 2020

Abstract
The boundary between Bartonian (Eocene) marls and overlying Miocene marls of the Vence region (Alpes-Maritimes, France) is established precisely. The Miocene marls and associated molasse beds are found to be older than previously believed; the microfauna suggests that they are Aquitanian.
Le "flysch a quartzites" des territoires calabro-lucaniens (Italie meridionale)
Authors: Grandjacquet Claude 
Published: March 2020

Abstract
So-called quartzitic Flysch deposits of the southern Apennines in Calabria and Lucania, Italy, have generally been described as transgressive Eocene deposits. Evidence is here presented to show that they are allochthonous deposits, probably older than Eocene, which have been subjected to low-grade metamorphism and that they are in fault contact with a complex basement of autochthonous Mesozoic and Tertiary formations.
Sur les massifs rhyolitiques pharusiens de la region d'Edembo-Emi Lulu (Ahaggar oriental)
Authors: Guerange Bernard 
Published: March 2020

Abstract
Numerous Pharusian (Precambrian) rhyolitic massifs occur in the Edembo-Emi Lulu area in the eastern Ahaggar mountains, Algeria. The rhyolite surrounds granite cores, with microgranite and ortholeptynite in the intervening zone. The relations between these different rock types can be explained as due to granitization following rhyolitic volcanism.
Stratigraphie du Cambro-Ordovicien du Tassili n'Ajjer (Sahara central)
Authors: Dubois Paul 
Published: March 2020

Abstract
A series of stratigraphic sections in the area between Amguid and Fort Gardel in the Tassili n'Ajjer region (Algeria) of the central Sahara are reported. The erosional unconformity in the Cambro-Ordovician sequence, already reported by a number of authors, appears to be a general characteristic of the sections in this area.
Sur quelques poissons fossiles du Bassin parisien
Authors: Signeux Jeanne 
Published: March 2020

Abstract
Two specimens of fossil fish from the Eocene and Oligocene were recently discovered near Paris. Zapteryx bichuti n. sp. is from limestone of Lutetian (middle Eocene) age in the Civet-Pommier quarry near Saint-Vaast-les-Mello. Notogoneus janeti Priem is from marl of lower Oligocene age in the Lambert quarry near Cormeilles-en-Parisis.
Presence d'une faune marine dans les assises infra-gypseuses (Ludien) de la butte de L'Hautil (Seine-et-Oise)
Authors: Feugueur Leon 
Published: March 2020

Abstract
Two horizons of marine molluscs about 3 m below the upper thick gypsum stratigraphically belong to the Lucine marl. The upper bed is characterized by Potamides perditus, Corbulamya nysti, and Lucina inornata. The lower bed contains Potamides tricarinatus, Cardium granulosum, and Ampullina parisiensis. The presence of two marine incursions among the lagoonal-continental gypsum formations of the Paris area, France, thus is proved. Molluscs at the same stratigraphic horizons were found in boreholes.
Le gite de pyrrhotite de Lacourt (Ariege)
Authors: Debeaux M. , Thiebaut Jean , Weppe Maurice 
Published: March 2020

Abstract
The Lacourt granite, SSE of Saint Girons in the Pyrenees of southwestern France, is a post-tectonic intrusive cutting Hercynian folds. The granite, characterized by a 1:2 ratio between microcline and plagioclase, and by incipiently-chloritized biotite, had contact-metamorphic effects on the country rocks. Granite and the contact-metamorphic aureole in turn are cut by several large, nearly vertical dikes of quartz, one of which is mineralized with pyrrhotite. The age relationships are not clear. The granite and quartz may be late Hercynian, or much younger, or may even represent several successive phases. Thick pyrrhotite emplacements are locally important.
Histoire de l'evolution tectonique de la zone plissee alpine de l'Europe orientale et de l'Asie-Mineure
Authors: Muratov M. V. 
Published: March 2020

Abstract
Recent literature on the tectonic evolution of the Alpine chain in eastern Europe and Asia Minor is reviewed. Two major periods are recognized in describing the tectonic history of the region. The first embraces all the Paleozoic, ending with the Hercynian orogeny, and probably represents an early period of geosynclinal evolution. The second period is represented by a geosynclinal stage, including the Mesozoic and part of the Paleogene up to the end of the Oligocene, and a terminal stage of orogenesis embracing the Neogene and Quaternary. The geosynclinal stage of the second period can be divided into three phases--an early phase embracing the Triassic, lower and middle and perhaps the upper Jurassic and Cretaceous, and characterized by formation of the first Triassic basins on the peneplaned Paleozoic landscape; a second phase, Cretaceous-middle Eocene, characterized by enlargement of the geosynclines and deposition of flysch; and a third phase which began after the end of the middle Eocene, characterized by closing of the geosynclines. Oceanic trenches which developed in the Black Sea and the southern Caspian, Marmara, Aegean, Ionian and eastern Mediterranean seas are recent structures not connected with the geosynclinal evolution and are superimposed on the continental surface of the geosynclinal structures. The arrangement of the depressions and the uplift during the geosynclinal stage were determined by abyssal faults imposed during the Paleozoic. Magmatic intrusions and volcanism developed in the late geosynclinal phases.
Etude du Lutetien inferieur a Boissy-Saint-Leu-d'Esserent (Oise)
Authors: Blondeau A. , Cavelier Claude 
Published: March 2020

Abstract
Stratigraphic, paleontological and sedimentological study of the lower Lutetian limestones and sands exposed in a railroad cut northwest of Boissy, in the Creil area (France), provides more precise information on the lower Lutetian in the region northwest of the Oise river. The three upper beds in the cut represent the transition from the lower to upper Lutetian and are equivalent to Zone III of R. Abrard. The three lower beds are partially dolomitized and represent Abrard's Zone II. Although the boundary between these two zones is dolomitized, it can be determined on the basis of the microfauna. Granulometry of the quartz sand shows a characteristic coarse grain in the lower Lutetian becoming finer in the upper zone.
Les genres Obovothyris et Digonella (brachiopodes). Etude de quelques Digonella et definition de Digonella sinuata nov. sp
Authors: Rollet A. 
Published: March 2020

Abstract
Based on morphological and biometric studies of available specimens of Obovothyris obovata from the upper Bathonian (Jurassic) beds of Bregille and of Digonella 'digona' from the lower Callovian (Jurassic) beds of Maizieres and Tarcenay, several external and internal characteristics are listed showing the differences between the two genera Obovothyris and Digonella. Biometric studies of several Digonella species for population analysis indicate the presence of three distinct population assemblages and the identification of a new species, Digonella sinuata, from the marls of Maizieres and Tarcenay of Callovian age.
Precisions sur la genese de la breche d'Idjil (Fort-Gouraud, Mauritanie). Chronologie de la formation des minerais de fer et de la breche
Authors: Huvelin Paul 
Published: March 2020

Abstract
Idjil breccias are diaclastic, predominantly banded quartzite fragments disposed without apparent stratification or orientation in a silica and iron oxide cement. Intermediate facies occur between the breccias and the encasing banded quartzites and are concordant with the latter. The intermediate facies were probably the source of the elongate pseudo-pebbles which are included in the breccia and which sometimes form pseudo-conglomerates. Three types of contacts are recognized between the banded quartzites and the breccia--progressive, fault, and cataclysmic passage. The formation of the Idjil breccia may have been related to drag folding producing strongly inclined axes affecting the banded quartzites. The Fort-Gouraud iron minerals were probably formed after the breccia.
Extension des series a facies pharusien sur les confins du Tanezrouft oriental (Sahara central)
Authors: Gravelle Michel 
Published: March 2020

Abstract
The Pharusian (Precambrian) conglomerates associated with the I-n-Temeroueline complex have been discovered on the northwestern side of the I-n-Temerouelt hills, thus extending the known limit of the Pharusian trough considerably to the west.
Sur les Alpujarrides occidentales et leurs rapports avec la nappe de Malaga (Andalousie meridionale)
Authors: Boulin Jean 
Published: March 2020

Abstract
New information requires modifications in stratigraphic and structural interpretations of the western Alpujarrid massif of southern Spain. The pre-Triassic Velez-Malaga and Almencar schists of the southwest limb of the Sierra Tejeda-Sierra Almijara anticlinal mountains of the western Alpujarrid massif belong to it, not to the Malaga nappe of unmetamorphosed Devonian to Triassic clastics overriding the schists on the southwest. The nearly-straight schist-dolomite contact from Canillas Aceituno southeast to Maro is the normal stratigraphic contact of the two in the anticlinal limb, not the trace of the contact of a schist nappe thrust upon the dolomite. Relationships of the Alpujarrid formations are shown clearly in a series of transverse stream gorges. The schists are interbedded with tremolite-phlogopite-bytownite metamorphosed dolomite, some beds of which are lenticular in schist. The existence of this older pre-Triassic dolomite had not been suspected. Overlying this series is an alpine facies of slightly-metamorphosed phyllite with gypsiferous beds, and Triassic limestone and dolomite.
Contribution a la connaissance sedimentologique du Callovo-Oxfordien de Normandie et du Haut-Maine
Authors: Poisson Andre 
Published: March 2020

Abstract
Sedimentologic study of upper Callovian and lower Oxfordian (Jurassic) formations in the Villers-sur-Mer, Mamers, and Mans areas of northwestern France is described. Typical marine conditions of the Callovo-Oxfordian for that region were indicated in the Villers-sur-Mer area by dominance of illite and kaolinite, and logarithmic facies granulometry representing quiet but long-continued reworking of materials. At Mamers, conditions indicated are alternation of marine conditions similar to those at Villers-sur-Mer with sandy littoral facies characterized by illite and montmorillonite, a hot dry climate, and tendency toward lagoonal environment.
Les roches volcaniques du Trias inferieur du versant nord des Pyrenees
Authors: Morre Nicole , Thiebaut J. 
Published: March 2020

Abstract
Detailed petrographic and chemical analyses of the principal zones of occurrence show that volcanic rocks interbedded in detrital deposits at the top of the Permo-Triassic section of the north flank of the Pyrenees (France), or occurring in the boundary between the Permo-Triassic and Muschelkalk (Triassic) limestones, are not melaphyres or basalts, but are albitophyres, orthoalbitophyres, and potassic spilites resembling Triassic volcanic rocks of the outer Alps.
Baueria tessieri nov. sp. (Arbaciidae), echinide nouveau du Danien de Popenguine (Senegal)
Authors: Roman Jean , Debant P. 
Published: March 2020

Abstract
Describes Baueria tessieri n.sp. from Danian (Cretaceous) deposits of the Popenguine region, Senegal. Only three species of Baueria have previously been known, all from Eocene localities.
Determination de l'age des granites allochtones de l'Apennin septentrional
Authors: Eberhardt Peter , Ferrara Giorgio , Tongiorgi Ezio 
Published: March 2020

Abstract
Rb/Sr and K/Ar datings of muscovite and biotite place the allochthonous granites of the northern Apennines, north of La Spezia (Italy), in the Hercynian.
Bref apercu sur la geologie de l'Apennin au NW des Apuanes
Authors: Elter Piero 
Published: March 2020

Abstract
The structure, stratigraphy, and orogenic history of a large area of the Apennines northwest of the Apuanes massif (Italy) was studied and it was concluded that a large portion of Tuscany is occupied by an autochthonous platform and by the Tuscan nappe. The nappe, with basal upper Jurassic to middle Cretaceous beds, overlies Oligocene and possibly Miocene formations of the autochthon. Both nappe and the stable platform area are overlain by sedimentary beds of the Ligurian series.
Considerations sur deux coupes a travers l'Apennin septentrional
Authors: Trevisan Livio 
Published: March 2020

Abstract
The tectonics of the Tuscan nappe area of the northern Apennines (Italy) are studied in two traverses across the Apuanes massif. The results suggest that the nappe was positioned by gravity sliding over upper Triassic evaporite beds. Subsequent to the major movement, probably as late as Miocene or Pliocene, faulting in the area formed horsts and grabens which control the present topography.
Description de formations quaternaires semblables a des 'diapirs' dans les alluvions anciennes de la Seine et de la Marne pres de Paris
Authors: Michel Jean Pierre 
Published: March 2020

Abstract
Several quarries southwest of Paris, near the confluence of the Marne with the Seine, display uplifts of the Ludian Eocene marls. Despite their small size, they are termed diapirs in that they tilt and pierce the overlying strata. The Bonneuil quarry shows six diapirs, varying in shape and orientation. They all display steep slopes, convex summits, and severe tilting of overlying Quaternary gravel beds. Some are isolated and others form complexes representing high points of single uplifts. The Trioux a Chelles quarry has 12 diapirs, several cut in vertical section. In addition to being pierced by marl diapirs, the overlying Quaternary gravel beds of both quarries are injected with thin marly veinlike structures. The complex form of the diapirs, interpenetration of the injections and accommodation of overlying strata to uplift suggest that the deformations were produced when the marls were in a softened state.
Sur les ophiolites et les breches associees dans l'Apennin septentrional
Authors: Labesse Bernard 
Published: March 2020

Abstract
Serpentine diabase ophiolite massifs in northern Italy are frequently underlain by heterogeneous breccias. In a study of this association near the village of Pregola it was concluded that the breccias were deposited during explosive activity directly preceding the extrusion of the ophiolites. The microfauna of the underlying breccia included Calpionella alpina, Stenosemellopsis hispanica and Stomiosphaera minutissima and indicate a lower Cretaceous age (probably Berriasian-Valanginian), for the ophiolitic extrusions in the area, rather than the previously accepted upper Jurassic dating.
Application des methodes geophysiques a la tectonique profonde du nord-ouest de la Mediterranee (mer 'hesperienne')
Authors: Glangeaud Louis 
Published: March 2020

Abstract
Geodynamics is the liaison science between physics and geology. Its purpose is to correlate data obtained by geology, geophysics, and experimental physics. The major units of the southern Hesperian sea, derived from geophysical studies and presented at the geological congress in Monaco, are described in relation to the structures of the Provence littoral zone. The M-discontinuity is less than 12 km deep under the Hesperian sea. Deformation of the mantle in the Hesperian region is an indirect consequence of the Oligocene-Burdigalian compaction. The bulging of the mantle revealed by gravimetric anomalies along the coast represents the prolongation of the principal Pyrenean axis.
L'orientation des mineraux des roches sous l'influence de la contrainte; II, Mineraux monocliniques et micas
Authors: Goguel Jean 
Published: March 2020

Abstract
Feldspar, amphibole, pyroxene, and micas in metamorphic rocks, relationship of orientation to direction of minimum solubility at crystallization; see also this Bibliography Vol. 30, Goguel 2 and Vol. 31, No. 11, 11 E67-09759
Etude stratigraphique du Muschelkalk superieur calcaire et dolomitique de Basse-Provence occidentale entre Bandol et Hyeres (Var)
Authors: Caron Jean Paul H. 
Published: March 2020

Abstract
Middle Triassic sections, lithology, four time-stratigraphic units, biostratigraphy, comparison with the Lorraine Muschelkalk, France
Observations complementaires sur la couverture triasique et son substratum dans la region occidentale des Vosges; nouveaux forages dans les bassins de Vittel, Contrexeville et Martigny-les-Bains; resultats de la campagne de recherche hydrogeologique 1961-1966
Authors: Minoux Georges 
Published: March 2020

Abstract
Seven measured lithologic sections, aquifers, hydrostatic-thermal-piezometric data, France
Sur quelques especes nouvelles de Bryozoaires de l'Ordovicien superieur de la Montagne-Noire
Authors: Boulange Marie Francois 
Published: March 2020

Abstract
Six species of bryozoa are described from the upper Ordovician of the south flank of Montagne Noire in southern France: Crepipora vesiculosa n. sp., Atactoporella irregularis n. sp., Cyphotrypa magna n. sp., Heterotrypa magnopora n. sp., Trematopora hirsuta n. sp., and Enallopora lineata n. sp.
Presentation des maquettes de la premiere carte hydrogeologique normalisee a grande echelle realisee en France; feuille de Douai au 50,000e
Authors: Margat Jean , Ricour Jean 
Published: March 2020

Abstract
The Douai sheet of the hydrogeologic map of France (1:50,000) prepared by the Bureau de Recherches Geologiques et Minieres (Paris), with the collaboration of the University of Lille, inaugurates a series of large-scale hydrogeologic maps of France. The Douai quadrangle of northeastern France was chosen as the initial sheet because of the optimum status of all pertinent data as compared with other quadrangles in the nation: particularly the nearly completed systematic inventory of geologic and hydrogeologic information from government and private sources, a suitable base map, and the nature of the geology of the area. At this time other areas would provide information for a scale not greater than 1:100,000. The issue of this sheet is intended to elicit suggestions for further improvement in hydrogeologic mapping.
Sur une particularite anatomique de certains poissons du Permo-Carbonifere des bassins de Commentry et Autun
Authors: Blot Jacques , Heyler Daniel 
Published: March 2020

Abstract
Paramblypterus decorus, a fossil fish occurring abundantly in the Stephanian (upper Carboniferous) of the Commentry basin near Montlucon in central France, differs from most palaeoniscids in having no teeth on the maxillary and the mandible. Instead, these are separated by a striated zone (five to six millimeters in a fish 30 centimeters long) bearing a line of extraordinarily small teeth each at the end of a small tube-like structure. These structures are known also in Aeduella, a genus of the middle Autunian (lower Permian). Specimens from the Autunian of the Autun basin northeast of the Commentry basin resemble those from Commentry, but their state of preservation does not permit more than tentative referral to P. decorus. These two probably identical forms from neighboring basins indicate no important stratigraphic break between the Stephanian and the Autunian in central France. Further investigation of the palaeoniscids is required to evaluate the relationship between P. decorus and the genus Aeduella, and to learn whether this unusual structure of the buccal region appeared before the Stephanian.
Bassin houiller de Durban-Corbieres (Aude, France)
Authors: Ovtracht Andre , Vila Jean Marie 
Published: March 2020

Abstract
Upper Carboniferous plant-bearing beds crop out in a coal basin along the Berre river, near Corbieres. The beds, from bottom to top, include red conglomerates with elements of Ordovician schist, arkosic schists and argillites, sandy schists, conglomerate, arkose-sandstone, and a second bed of red conglomerate with Ordovician elements unconformably overlying the series below. This sequence unconformably overlies Ordovician schists with no evidence of beds representing Gotlandian-Dinantian deposits. The beds thicken rapidly from northeast to southwest and are overlain unconformably by the middle Triassic Muschelkalk dolomites which are in turn overlain by the upper Triassic Keuper marls. The discordance of the Mesozoic on the Carboniferous and the similarity between the upper- and lowermost beds in the basin suggest that the Carboniferous beds represent a fold overturned to the south and eroded prior to deposition of the Triassic. Plant remains collected from the sandy schists suggest a Stephanian age. Abundant Sphenopteris and Pecopteris are among the significant genera represented.
Stratigraphie des terrains dinantiens de l'Argentella-Tour Margine (nord-ouest de la Corse)
Authors: Krylatov Serge 
Published: March 2020

Abstract
The Argentella-Tour Margine outlier, surrounded by Hercynian granites, consists of a crystalline metamorphic series overlain with angular disconformity by a sedimentary series. The metamorphics, produced by regional and subsequent contact metamorphism, are primarily schistose quartzites with chlorite, sericite, and occasional biotite. This pre-Visean series contains carbonaceous shale characteristic of the Gothlandian, and is overlain by rocks containing a Visean limestone. The sedimentary series is divided into a lower group consisting primarily of arenacous schists locally containing successive beds of monogenic conglomerates, sandstone-quartzites, the lower jasper (Lydianstone), and polygenic puddingstone, and an upper group (Tour Margine formation) composed of an intimate mixture of albitophyres and volcano-sedimentary rocks with isolated beds of the upper jasper, and encrinital limestone (Capitello) of Visean age.
Etude preliminaire des argiles eocenes, mio-pliocenes et actuelles de la region de Metlaoui-M'Dilla et du cap Bon (Tunisie)
Authors: Sassi Sassi B. M. 
Published: March 2020

Abstract
Eocene and Mio-Pliocene formations of the Gafsa region are differentiated by their clay minerals. The clays of the El-Haria formation are composed of equal amounts of montmorillonite and kaolinite. The overlying Eocene marine clays of Djebel M'Dilla are composed of montmorillonite, illite and traces of kaolinite, and include a bed of clay containing montmorillonite and sepiolite-attapulgite. The continental Mio-Pliocene deposits around Djebel M'Dilla contain a suite of minerals including kaolinite, attapulgite, illite, montmorillonite and chlorite. These minerals apparently do not have authigenic characteristics. Diffractograms obtained from these deposits indicate pronounced crystallinity of the minerals. Mineralogic variation in the clay lenses shows that, from the base to the top, illite and, to a lesser degree, kaolinite, gain importance at the expense of the montmorillonite. At Cape Bon, the Oligocene is rich in kaolinite with subordinate amounts of illite and montmorillonite. Vindobonian, Pliocene and Recent deposits contain the same phyllites but with kaolinite and montmorillonite in equal proportions and a lesser percentage of illite. The uniformity exhibited by the Miocene clays--suggesting monotonous accumulation from a single source of supply--reaffirms the fact that the composition of clays depends more on the nature of the source of supply than on the diagenetic modification produced in the course of sedimentation. The montmorillonitic mineral of these deposits is an unstable phyllite intermediate between a classic montmorillonite in the Eocene and an ammersoite in the post-Eocene.