bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sur la tectonique du synclinorium median au nord de Rennes
Authors: Philippot Andre 
Published: March 2020

Abstract
The Menez-Belair synclinorium north of Rennes, France, is conceived to be a system of blocks uplifted along vertical faults. Movement, probably due to slow isostatic readjustment after orogeny, began at the close of the Paleozoic and continued through the Tertiary--during which time displacement of a hundred meters or so occurred--and possibly is still going on imperceptibly. This structural hypothesis probably can be extended to other synclinal zones in the Armorican massif.
Les formations detritiques de La Ciotat (Var); etude statistique et petrographique
Authors: Blanc Jean Joseph 
Published: March 2020

Abstract
Study by means of granulometric, morphoscopic, petrographic, and chemical analysis of the upper Cretaceous detrital formations in the vicinity of La Ciotat (Var) clears up several points regarding the paleogeography of the western Beausset basin, France. The Canaille and Soubeyran sandstones, which are ferruginous, more or less cross-bedded, and grade into each other, indicate shallow deposition relatively near the Hispano-Pyrenean-Corsican-Sardinian continent, under oxidizing conditions. The Bec de l'Aigle conglomerates, composed mainly of primary elements from the continental mass, represent a vast delta. The torrential La Ciotat facies, described in detail, first appears in the middle Angoumian and reaches its maximum at the base of the upper Angoumian. It marks the maximum dissection of the continent, whose shores at that time probably lay less than a dozen kilometers from the present coast.
Sur un nouveau Medullosa du Stephanien de Rive-de-Gier
Authors: Boureau Edouard 
Published: March 2020

Abstract
Describes remains of the plant Medullosa geriensis (previously named, but never hitherto described) from Stephanian (Carboniferous) deposits of the Rive-de-Gier area, France. It is the youngest known representative of the subgenus Anglorota.
Nouvelles observations stratigraphiques et paleontologiques sur le Cretace des monts du Hodna (Algerie)
Authors: Glacon Jules , Mongin Denise 
Published: March 2020

Abstract
New exposures of the Cretaceous of the Hodna mountains in the Ampere region, Algeria, have yielded pelecypod faunas, which are interesting by virtue of their rarity, their geographic and stratigraphic distribution, and their variations. These deposits, the most important of which is the Barremian deposit of Bled-el-Menntene, are described stratigraphically by Glacon, paleontologically by Mongin. The Albian evolution of Plicatula is worked out on the basis of a biometric study of the variations of P. radiola.
Le passage de la nappe de Morcles aux plis subalpins
Authors: Goguel Jean 
Published: March 2020

Abstract
The Helvetic, or Dauphinois, zone is represented in Switzerland by a group of Helvetian nappes, and in France by a bundle of Subalpine folds. The Morcles nappe, the lowermost of the Helvetian nappes, is traced southward and shown to pass into Subalpine folds. The reason advanced for the difference in the mode of deformation is that in France the Mesozoic is represented by a uniform series which behaved structurally as a unit, whereas the varied formations of the Mesozoic in Switzerland reacted differentially.
Le calcaire massif a Prod. sublaevis de la region d'Avesnes
Authors: Derville Henri 
Published: March 2020

Abstract
The Productus sublaevis-bearing massive oolitic limestone at the base of the Visean (Carboniferous) in the Avesnes region, France, is not homogeneous lithologically, but consists of a continuous series grading from coarsegrained limestone to a purely oolitic facies. Details of each of these facies are described.
Sur les series quartzo-schisteuses de l'Afrique equatoriale francaise
Authors: Cahen Lucien 
Published: March 2020

Abstract
Distinguishes three series within the Precambrian complex of French Equatorial Africa, and discusses their correlation with the Precambrian of other African regions. Special attention is given to the two subdivisions distinguished in the quartzite-schist series which overlies the lower Precambrian granite-gneiss complex.
Les phases fluides dans les phenomenes petrogenetiques; le temoignage des inclusions liquides et gazeuses face aux theories [with discussion]
Authors: Deicha Georges A. 
Published: March 2020

Abstract
Liquid or gaseous inclusions in rocks, important evidence on conditions of origin, are lost in ordinary petrographic techniques; various auxiliary techniques are reviewed briefly. The shape of cavities and their distribution serve to distinguish primary from secondary inclusions. Three classes of inclusions are recognized on the basis of the nature of the fluid--gaseous (usually monophase), aqueous (often diphase), and, most common, aqueous with gas under pressure (often triphase). Results of mineral synthesis at high temperatures and pressures confirm the importance of fluida in the genesis of minerals and rocks, but present knowledge of the liquid and gaseous constituents is still very scanty compared to that of the solid components.
A propos d'un phenomene de croissance secondaire des feldspaths potassiques dans une microgranulite filonienne
Authors: Collomb Pierre 
Published: March 2020

Abstract
In a microgranulite vein of the Villefranche region, France, large poikiloblasts of orthoclase are developed, which were clearly formed by recrystallization in the solid state. The boundaries of the vein are clear-cut and parallel, the accepted criteria for emplacement in the liquid state. The question is posed whether many granites might not prove to be the result of such secondary recrystallization in the solid state of finer-grained eruptive rocks originally emplaced as magma.
Deux dasycladacees du Lias de Vendee
Authors: Morellet Jean , Ters Mireille 
Published: March 2020

Abstract
Gives the location, stratigraphy, and petrography of the Hettangian (Liassic) beds on the Vendee coast, France, in which have been found the two algae here described. Both of these--Tersella incompleta, a new species, and Diplopora? sp.--belong to the dasycladaceans and lived in very shallow, warm coastal seas.
Sur la presence de structures obliques dans l'Atlas tellien de la province d'Alger
Authors: Mattauer Maurice 
Published: March 2020

Abstract
Establishment of the stratigraphy of the Tell (Maritime) Atlas range in Algeria reveals structural anomalies, principally a structural depression crossing the entire Tell region and folds and faults oblique to the general east-west trend of the region. These are explained as the result of major dislocations of the basement, which have a northeast-southwest orientation. It is suggested that similar anomalies in other parts of Algeria can be explained on the same basis.
Flore a Gigantopteris et flore permo-carbonifere europeenne
Authors: Doubinger Jeanne 
Published: March 2020

Abstract
The Permo-Carboniferous floras of the Central Massif, France, reveal new relationships between the European and Gigantopteris (Cathaysian) floras. Comparison with various collections from the Cathaysian province indicates that the Gigantopteris flora is composed of four, rather than two, groups of plants, and that the Permo- Carboniferous flora poses the same stratigraphic problems in the Far East as in Europe; moreover, it confirms other recent conclusions to the effect that the paleogeographic provinces of the Permo-Carboniferous were less sharply defined than previously believed.
Sur la representation graphique de la granulometrie des sediments meubles; interpretation des courbes et applications
Authors: Riviere Andre 
Published: March 2020

Abstract
Discusses the various methods of graphic representation of granulometric measurements of unconsolidated sediments, drawing attention to the fact that the position of the maxima of frequency curves in the granulometric scale depends on the method used, and concludes that it is often desirable to try several methods, whether an isolated sediment is concerned, or a group of samples.
Les directions de fractures dans le Bresil, centre-est
Authors: Brajnikov Boris 
Published: March 2020

Abstract
Compilation of structural information on eastern central Brazil from various sources reveals a remarkably constant orientation of faults over the whole region. Three distinct systems can be recognized. This regional structure is tentatively interpreted as the result of increase in volume of the crystalline complex due to progressive granitization. An increase of five to ten percent or more could have caused pressures greatly exceeding the elastic limit of the crystalline rocks, causing them to rupture.
Contribution a la tectonique du Vignoble aux environs de Lons-le-Saunier (Jura)
Authors: Bonte Antoine 
Published: March 2020

Abstract
An interpretation of the structure of the vineyard region bordering the Jura mountains, France, based on surface observations and borings in the vicinity of Lons-le-Saunier. The apparently disorderly relief is controlled by a combination of deep and superficial dislocations. The essential structural element is a series of north-south-trending faults, produced by tension associated with subsidence in the Oligocene. A phase of compression starting at the end of the Miocene produced bedding-plane slips at various stratigraphic levels (locally accompanied by folding and buckling in the interior of the moving mass) and horizontal displacements.
Sur les formations hexagonales
Authors: Matschinski Matthias 
Published: March 2020

Abstract
A general explanation of the phenomena of hexagonal formations, which can be applied not only to the interpretation of polygonal soils, but also to basalt columns, orogenesis, or any geometric geologic problem. The degree of perfection of form is governed by the relation of velocity of fissuration to velocity of propagation of tensions; when the former is lower than the latter, regular hexagons result. An extensive bibliography is appended.
Contribution de l'hydrogeologie thermale a la tectonique; l'aire d'emergence d'Hammam Meskoutine (departement de Constantine)
Authors: Urbain Pierre 
Published: March 2020

Abstract
Study of the distribution of the hot springs and travertine deposits of Hammam Meskoutine in Algeria throws light on the structure of the region. The springs are oriented along a network of very deep fissures. Hydrodynamic conditions permitting rapid ascent of the spring waters to the surface account for their exceptionally high temperature (93.9 degrees C) and enormous discharge (at least 15 m &lt;sup&gt;3&lt;/sup&gt; per minute). Deposition of calcareous sinter, in the form of stalagmitic, conical, and elongate concretionary masses, amounts to two tons a day.
Le littoral de la Tranche (Vendee) a l'ile Madame (Charente-Maritime)
Authors: Bourcart Jacques 
Published: March 2020

Abstract
Along the Atlantic coast of France there are numerous elevated platforms which testify to former sea levels, but as yet no true raised beaches have been found, at least not any dating from the pre-Flandrian. Various sediments found between Tranche (Vendee) and Madame island (Charente-Maritime) which may be related in one way or another to former shore lines are discussed.
Sur la presence de Sphenophyllum costae Sterzel dans le bassin houiller de Decazeville (Aveyron)
Authors: Doubinger Jeanne , Vetter Pierre 
Published: March 2020

Abstract
Sphenophyllum impressions in Carboniferous sandstones of the Decazeville coal basin, France, are identified as S. Costae. The excellent state of preservation reveals details of venation not visible in the original specimens, and also shows that S. alatifolium is essentially the same as. S. costae and should be attached to that species.
Les foraminiferes du "niveau d'Herouval" a Herouval (Oise)
Authors: Le Calvez Yolande , Feugueur Leon 
Published: March 2020

Abstract
Lists Eocene foraminifers collected from the Herouval zone at Herouval, Oise, France, notes their relative abundance, and describes two new species (Spiroloculina morelleti and Discorbis herouvalensis). The presence of species which had disappeared by the Lutetian, and the absence of large Rotaliidae and Miliolidae common in the Lutetian of the Paris basin suggest that this zone is Cuisian in age.
Etude de la precision des analyses de roches
Authors: Laffitte Pierre 
Published: March 2020

Abstract
Discusses the sources of error in chemical analyses of rocks. Sampling errors due to nonhomogeneity of the rock cannot be calculated, but sampling errors due to large grain size, errors due to loss during crushing operations, and errors introduced in actual chemical procedure are analyzed statistically. A series of analyses of the same sample confirms the calculation.
Sur la repartition des terrains mesozoiques metamorphises dans les plis alpins de l'Anatolie (Turquie)
Authors: Lahn Ervin 
Published: March 2020

Abstract
Metamorphosed Mesozoic formations in Anatolia, Turkey, resembling those of Pennine nappes and of Alpine nappes in Graubuenden (Switzerland), occur in regions where strong horizontal pressure was exerted during folding, which was related to the distribution of rigid masses in the foreland and intermediate zones.
Sur quelques restes de sauriens du Rhetien et du Jurassique lorrains
Authors: Huene Friedrich von , Maubeuge P. L. 
Published: March 2020

Abstract
Describes isolated remains of reptiles (teeth, vertebrae, and other fragments) from Rhaetic (Triassic), Liassic, and Rauracian (Jurassic) deposits of Lorraine, France, which are of general as well as local paleontologic interest.
Ampleur de l'erosion pontienne et du comblement pliocene en Camargue
Authors: Beaufort Lucien , Bruneau Jean , Grepin Andre , Julian Yves 
Published: March 2020

Abstract
On the basis of information gained from drilling and geophysical (mainly seismic) surveys in the Camargue region, southern France, the extent of upper Miocene (Pontian) erosion and lower Pliocene (Plaisancian) deposition has been established, and the Pontian drainage pattern of the region plotted. Both erosion and subsequent marine invasion occurred very rapidly.
Ampleur des regressions glacioeustatiques
Authors: Cailleux Andre 
Published: March 2020

Abstract
With allowance for isostatic compensation, the maximum lowering of sea level due to Quaternary glaciation is calculated to be 90 to 150 m with respect to present zero level. This is insufficient to explain submarine canyons. The more extensive Precambrian ice caps, on the other hand, could have lowered the sea by the required amount.
Sur la tectonique des causses du Quercy [with discussion]
Authors: Geze Bernard 
Published: March 2020

Abstract
The major faults and folds of the Quercy karst region, France, show three directions--Armorican in the northern part, Villafranchian in the southern, and Pyrenean in the main part. A possible explanation involves gliding of the sedimentary cover, on argillaceous upper Triassic beds, along a basement plunging southwest in the north and northwest in the south. Minor structures are more varied in orientation and for the most part express torsional, tensional, and compressional forces around domes or at the upturned border of the Central Massif.
L'origine des mineraux [argileux] des sediments marins
Authors: Riviere Andre , Visse Leon 
Published: March 2020

Abstract
Reviews present knowledge of the origin of the clay minerals in marine sediments. Arguments in favor of allochthonous origin (deposition from transported material) seem to be more conclusive than those for origin in place. Only the former can explain the homogeneity of marine clays deposited under conditions characterized by multiple physicochemical variations.
Vaugnerites et amphibolites; deux types de roches amphiboliques dans les Cevennes a la hauteur de Largentiere (Ardeche)
Authors: Palm Quirijn A. 
Published: March 2020

Abstract
Describes the vaugnerites and amphibolites forming sills and lenses respectively in the crystalline rocks of the middle Cevennes mountains, France. On the basis of the type of twinning and the relative proportion of the different types of included twinned (and untwinned) plagioclase crystals, the vaugnerites are considered igneous and the amphibolites metamorphic in origin.
Remaniements dans les alluvions anciennes de l'Oise a Cergy (Seine-et-Oise)
Authors: Vatan Andre , Boyer F. 
Published: March 2020

Abstract
Mineralogic and granulometric study of the ancient alluvial deposits of the Oise at Cergy, Seine-et-Oise, France, shows that their sandy portion is derived mainly from local Bartonian (Eocene) sands which formerly covered Lutetian structural surfaces to a greater extent than at present.
Le probleme du "Sparnacien" dans le SE du Bassin parisien
Authors: Demarcq Gerard 
Published: March 2020

Abstract
The argillaceous sandy formations with interbedded sandstones and conglomerates in the southeastern Paris basin, France, previously considered Sparnacian in age, are shown to correspond to a sequence of early Tertiary peripheral beds--fluviatile, fluviolacustrine, and even littoral--representing the Sparnacian, Cuisian, Ludian, and Stampian stages.
Sur l'age du flysch de la zone des breches de Tarentaise
Authors: Barbier Reynold , Truempy Rodolphe 
Published: March 2020

Abstract
Recent discoveries of Orbitolina sp. in Flysch deposits in the northeastern part of the Tarentaise breccia zone in the Arc-Rhone region, France, show that these detrital deposits are lower Cretaceous in age, whereas the Flysch deposits in the southwestern part of the zone are Lutetian and Priabonian (Tertiary) in age. The intervening Moutiers Flysch complex may represent an intermediate zone in which both the Nummulitic and Cretaceous are represented.
Sur l'evolution des gneiss des Pyrenees
Authors: Guitard Gerard 
Published: March 2020

Abstract
On the basis of field work in the Canigou and Saint-Barthelemy massifs (France), study of hand specimens, and microscope analyses, two fundamental types of rock are distinguished in the so-called gneiss complex of the Pyrenees, resulting from two different metamorphic episodes during the Paleozoic. Recrystallization and regional feldspathization produced gneisses in which the almost always intense deformation followed or accompanied crystallization (syntectonic gneisses with well-defined lineation). A later episode of regional granitization produced gneissic granites, migmatites, and deep-seated granites (late and post-tectonic gneisses). The effect of regional granitization on the earlier gneisses was studied in detail in the axial zone of the eastern Pyrenees. Either the entire rock has been reconstituted in a homogeneous or heterogeneous manner, or transformation has taken place on a microscopic scale by crystal changes without appreciable change in the total aspect of the initial rock. The importance of replacement phenomena, pseudomorphs, and relic structures is discussed, as well as the relationships between regional granitization and the limited post-tectonic granites.
Nouvelles observations sur la "quatrieme ecaille" de Pierre Termier
Authors: Gidon Paul 
Published: March 2020

Abstract
The so-called fourth thrust slice of the Pelvoux massif region, France, originally described by Termier as having a distant origin, is considered to have been detached from the crystalline basement of the massif by advancing Brianconnais nappes and injected transversely in a diapirlike fashion into the overriding masses.
Sur l'anatomie et les affinites du Dadoxylon (Araucarioxylon) sahariense nov. sp., bois fossile du Continental intercalaire de l'Emi-Fezzan
Authors: Veillet-Bartoszewska Marie 
Published: March 2020

Abstract
Describes a new species of fossil wood--Dadoxylon (Araucarioxylon) sahariense--from continental deposits of the Emi-Fezzan region (Libia) in the Sahara. The new species is compared with other African Mesozoic Araucariaceae, and a key to the identification of species is presented.
Sur l'age et l'extension des terrains houillers dans la terminaison sud de Belledonne (dome de La Mure et regions annexes); leurs rapports avec le socle cristallophyllien
Authors: Haudour Jean , Sarrot-Reynauld J. 
Published: March 2020

Abstract
The Carboniferous coal-bearing sequence in the southern Belledonne massif area, France, has previously been assigned only to the Stephanian A. Westphalian beds have been identified at the base of the sequence, separated from the overlying strata by a conglomerate. They are considered to have been deposited in a broad syncline between two zones of high relief resulting from crustal movements during the Sudetic phase of the Hercynian orogeny. Following recurrent crustal movements, the Stephanian sediments were deposited in a slightly broadened syncline. The folded and faulted coal basin was further compressed and fractured during Alpine orogenic activity.
Sedimentation et paleoceanographie du Turonien et du Senonien dans le bassin du Beausset (Var)
Authors: Blanc Jean J. 
Published: March 2020

Abstract
Turonian-Senonian (Cretaceous) sections at a series of localities in the Beausset basin, Var, France, are described, with particular reference to individual cyclothems, with a view to interpreting the depositional history. Transgressive detrital sequences (Angoumian and Coniacian) consisting of vertically or laterally sorted Permo-Triassic material occur at the base of the cyclothems. The sequences are arhythmic or pararhythmic. The upper members show alternations or binary rhythms. Reef cyclothems begin with nodular biogenic limestones and generally end with breccias containing reworked Hippurites sp.
Revision de quelques especes de mastodontes du Miocene
Authors: Bergounioux Frederic Marie , Crouzel F. 
Published: March 2020

Abstract
A restudy of remains of Miocene mastodons in the Paris Museum collections shows that the fragments on which Miomastodon depereti and Serridentinus filholi are based are insufficient to warrant specific identification and that a molar from Biros, Gers, France, is a new variety, Serridanancus estramadurensis imperfecta.
Quelques mollusques du Toarcien des environs de Shakra (Arabie seoudite)
Authors: Basse Eliane , Karpoff R. 
Published: March 2020

Abstract
Outcrops and the molluscan fauna of Toarcian (upper Liassic) deposits in the vicinity of Shakra, Saudi Arabia, are described. The ammonite Shakraceras loeve n.g. n.sp. and the pelecypod Ceratomya karpoffi n.sp. are represented in the fauna.
Decouverte de stromatolithes du groupe des Conophyton dans le Pharusien de l'Ahaggar occidental (Sahara central)
Authors: Gravelle Michel , Lelubre M. 
Published: March 2020

Abstract
Stromatolites belonging to the Conophyton group are described from Pharusian (Precambrian) marbles of the western Ahaggar region (Algeria) in the central Sahara, and compared with closely related forms from the western Sahara. They represent the oldest stromatolites so far known in Africa.
Les depots vaseux de la Rance maritime et du Mont-Saint-Michel
Authors: Bourcart Jacques , Roa-Morales P. 
Published: March 2020

Abstract
The results of recent studies of the silts of the Rance estuary and the Mont-Saint-Michel bay do not support the concept that the widespread postglacial silting up of estuaries, gulfs, and bays along the Atlantic coast of France since Flandrian time is due to glacio-eustatic transgression.
Recherches geologiques preliminaires dans le massif du Parnasse (Grece)
Authors: Celet Paul 
Published: March 2020

Abstract
The stratigraphic sequence of the Parnassus massif in Greece begins with coral-bearing upper Triassic dolomites and limestones, which are overlain by a thick series of Mesozoic limestones capped by red shaly marls and sandy Flysch formations. The structure was influenced by the rigidity of the limestone cover, which is faulted and overthrust in slices toward the east-northeast. The massif as a whole is cut by deep east-west-trending faults, along which the large grabens bounding the massif on the north and south were downdropped.