bluuebunny/crossref_metadata_2025_split 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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.
Recifs, biohermes ou bancs fossiliferes d'Archaeocyatha
Authors: Debrenne Francoise 
Published: June 2020

Abstract
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

Abstract
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

Abstract
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

Abstract
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.
Du nouveau sur l'age des tufs volcaniques du pays nicois
Authors: Bourcart Jacques , Le Calvez Y. , Siffre M. 
Published: June 2020

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.
Observations sur de jeunes coquilles de mollusques du Pliocene saumatre du Llobregat (Barcelone)
Authors: Gillet Suzette 
Published: June 2020

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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 flore autunienne du detroit de Rodez; note preliminaire
Authors: Vetter Pierre 
Published: June 2020

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.