bluuebunny/crossref_metadata_2025 huggingface dataset:
Sur une flore probablement rhetienne a El Galala El Bahariya (rive occidentale du golfe de Suez, Egypte)
Authors: Carpentier A. , Farag I.
Published: June 2020

Describes the pre-Liassic to Eocene section exposed on a scarp face on the northeast slope of the Bahariya massif, Egypt, and discusses the age, probably Rhaetic (Triassic) or possibly lowermost Jurassic, of plant-bearing beds found at the base of the series of Bathonian (Jurassic) marls. Descriptions of the plant remains are included.
La "faille de Charlemont" (Givet-Ardennes) et ses abords
Authors: Bonte Antoine , Ricour J.
Published: June 2020

Proves that the so-called Charlemont fault in the Givet-Ardennes region, northeast France, is not a fault or the southern margin of a thrust slice, but represents the axis of a recumbent anticline. To the west of the structure, however, there is a major fault, not previously described in the literature, for which the name Foisches fault is proposed.
Contribution a l'etude petrographique des phosphates marocains
Authors: Visse Leon
Published: June 2020

Study of the mineral composition, fossil content, and physicochemical conditions of deposition of the phosphate beds of Morocco leads to the conclusion that they were formed in a shallow basin. Although lithologically similar to other north African phosphate deposits, they are distinguished by a greater abundance of radiolarians and foraminifers, the presence of sponge spicules, and the abundance of detrital inclusions.
Calcaires silicifies du causse du Larzac
Authors: Bergounioux Frederic Marie
Published: June 2020

Concludes that silica of organic origin played a considerable role in the formation of siliceous layers and nodules in the Bajocian (Jurassic) limestones of the Larzac karst region, France, and that diagenesis of the siliceous banks and limestones was contemporaneous.
Daniel Schneegans, 1907-1949
Authors: Gignoux Maurice
Published: June 2020

Biography and list of writings of the French geologist Schneegans, who made significant contributions to the geology of the French Alps, the Alsatian Juras, and the Pyrenees, as well as to petroleum geology and other subjects.
La flore eifelienne de Dechra Ait Abdallah (Maroc central)
Authors: Termier Henri , Termier Genevieve
Published: June 2020

Describes a plant assemblage (including Scougouphyton abdallahense n.g. n.sp. and Archaeopteris? rotundifolia n.sp.) from Eifelian (Devonian) formations of the Dechra Aiet Abdallah area, central Morocco, and discusses its affinities, with particular reference to its significance for interpreting the early history of vascular plants. The flora is transitional between Psilophyton and Archaeopteris floras, and contains elements of both.
Observations sur l'ancien volcan du Cezallier
Authors: Roux Jean
Published: June 2020

Concludes that the central cone of the Cezallier massif, a Tertiary volcanic mass in the Auvergne region, France, was demolished during a final phase of explosive activity, and that no flows were erupted during the Quaternary, as previously reported. Erosion of the massif during the glacial period was due to the action of a single extrusive plateau-type glacier.
Facies coralligene-oolithique et vaseux de l'Argovien et du Rauracien dans la Haute-Marne
Authors: Stchepinsky Vladimir
Published: June 2020

Two facies were developed in the Argovian-Rauracian (Jurassic) sequence of the Haute-Marne region, France, as a result of differences in depositional conditions created by uplift of the nearby Vosges massif. Formation of coral reefs and oolitic limestones took place in littoral zones; the calcareous marl facies to the west represents deposition in a trough.
Contribution a l'etude des schistes, calcschistes et grauwackes d'Angers; les trilobites des grauwackes d'Angers
Authors: Pillet Jean
Published: June 2020

Describes trilobites (including new species) from Siegenian (Devonian) graywackes of the Angers region, France. The trilobite fauna confirms the upper Siegenian age which had been assigned the graywackes on the basis of included brachiopods and other species.
La nappe du cap Sicie (Var)
Authors: Destombes Jean Paul
Published: June 2020

A north-south tunnel from the vicinity of La Seyne to the tip of Cap Sicie in Var, France, provides a continuous cross section of the formations encountered. In the center of the tunnel, an overturned fold caused thrusting of Silurian phyllites over the Permian. Mylonitic rocks within the phyllites are charged with quartz and very imperfectly recemented; they seem to indicate relatively superficial movement under a thin cover. To the north and south, the phyllites are massive and unbroken.
Remarques sur les schistes cristallins du cours inferieur de la Rance (Ille-et-Vilaine)
Authors: Cogne J.
Published: June 2020

The lower course of the Rance (Ille-et-Vilaine), France, crosses the general structure and affords excellent exposures through the zones of metamorphism in the crystalline schists. From south to north one first encounters ectinites (upper and lower mica schists), then migmatites. Petrographic study of the latter shows that they were formed by recrystallization of preexisting rocks, accompanied by slight enrichment in Ca and K.
Sur les oursins de l'Eocene moyen de Catalca-Karacakoey (Trakkya, Turquie)
Authors: Pinar Nuriye
Published: June 2020

Describes a sea-urchin fauna from the middle Eocene of the region between Catalca and Karacakoey, near Istanbul, Turkey. Of the 14 species described, three are new: Triplacidia trakyensis, Galeraster terkosensis, and Euspatangus rogeri. The first of these and one other species (Porosoma cribrum) represent the regular echinoids, generally rare in the Tertiary.
Description d'une nouvelle espece d'Emplectopteris, Emplectopteris ruthenensis nov. sp. (bassin houiller de Decazeville, Aveyron)
Authors: Doubinger Jeanne
Published: June 2020

Describes a new species of Emplectopteris, E. ruthenensis, collected from the Decazeville coal basin, France, amongst a classic upper Stephanian (Carboniferous) flora. Widespread in Permo-Carboniferous deposits of the paleobotanical province of Cathaysia, the genus was hitherto unknown in European floras. This discovery confirms several recent conclusions that distinctions between Permo-Carboniferous floral provinces are less sharp than formerly supposed.
Metallogenie hydrothermale dans les monts de Teboursouk (Tunisie septentrionale)
Authors: Bolze Jean , Schneiderhoehn Hans
Published: June 2020

The hydrothermal sphalerite- galena-pyrite deposits on the flanks of the Triassic Fedj el Adoun diapir in the Teboursouk mountains of northern Tunisia, post-Pliocene in age, are controlled structurally by two principal fault directions, one parallel to the diapir contact and the other perpendicular to it. Microscopic evidence indicates very low-temperature conditions of mineralization, with abnormal paragenesis of the three sulfides--first galena, then sphalerite, then marcasite-pyrite. The origin is secondary, resulting from solution and redeposition of material derived from hydrothermal ores in basement rocks, with transportation of the lead and zinc by complex chlorides. The diapirism and mineralization are closely related, having a common cause in an active fault zone. Furthermore, the presence of the diapir has affected the ore deposition in two ways--mechanically, by opening and maintaining channelways, and chemically by maintaining the salinity of the solutions.
Metallogenie hydrothermale et remaniements ascendants dans la Lozere; extension possible du processus
Authors: Geffroy Jacques
Published: June 2020

Study of the barite veins in the Mende-Marvejols region, Lozere, France, shows two types of mineralization, called here the "socle" (basement complex) type, probably Hercynian, and the "couverture" (sedimentary cover) type, post-Liassic. The latter is considered to be the result of reworking of the earlier deposits by ascending solutions, probably in connection with Tertiary volcanism. Complex chlorides, derived from saliferous Triassic beds, seem to have played an important role in the process. This interpretation, which is based on Schneiderhoehn's theory of secondary hydrothermal deposits, can be applied to all the lead, zinc,and barite deposits of the peripheral zone of the Central Massif.
Formations quaternaires et evolution morphologique de la moyenne vallee de l'Yonne et de la basse vallee de la Cure
Authors: Tricart Jean
Published: June 2020

Three types of Quaternary formations are developed in the Yonne and Cure valleys, France, for several kilometers upstream from their confluence--periglacial limestone slope deposits; coarse, dominantly calcareous valley bottom alluvium, also periglacial; and interglacial finer-grained siliceous deposits. Two periglacial phases of deposition, probably Riss and Wuerm, are distinguished, separated by a period of nominal interglacial erosion. The present streams have been unable to erode the Wuerm fill to any extent. The morphologic evolution is essentially characterized by interglacial dissection and periglacial deposition, which is also true of the rest of the eastern Paris basin, the Sarthe, and the rivers of Germany. These facts considerably restrict the application of the theory of eustatism.
Pour une representation graphique des formations sedimentaires marines [with discussion]
Authors: Dreyfuss Maurice
Published: June 2020

Proposes adoption of mathematical coefficients permitting graphic representation of marine sedimentation, either of a series of beds in a given region or of a particular zone over a given area. These coefficients (subsidence and accumulation, agitation of water, and nature of the bottom), although as yet approximate rather than exact figures, are sufficient to permit comparisons and correlations, at least in the case of littoral and neritic deposits.
Sur quelques trilobites nouveaux ou incompletement connus du Massif armoricain
Authors: Pillet Jean
Published: June 2020

On the basis of new material from the Armorican massif, France, two new species of trilobites are described--Dechenella (Basidechenella) rogeri from Devonian deposits and Phacopidella (Denckmannites) aff. volborthi from Gotlandian (Silurian) deposits. The same material has also provided additional data on the species D. (B.) andegavensis and Cryphina andegavensis, and on the characteristics of the whole genus Cryphina of the Asteropyginae.
Expression analytique generale de la granulometrie des sediments meubles; indices caracteristiques et interpretation geologique; notion de facies granulometriques
Authors: Riviere Andre
Published: June 2020

The granulometric composition of most unconsolidated sediments is susceptible to general analytical expression and can be represented by simple algebraic functions defined by the two indices of evolution (n) and sorting (g).In the case of fine sediments, where dispersion is weak, these functions correspond rather precisely to the actual granulometric curves. Four granulometric facies corresponding to true sedimentary facies can be defined according to the index n.
Nouvelles donnees sur les alluvions du plateau de Vassincourt (Meuse)
Authors: Paque Andre
Published: June 2020

The alluvial deposits of the Vassincourt plateau, France, consist of fluviatile gravels overlain by unstratified clays. The basal gravels contain a typical cold climate (tundra) fauna, which was undoubtedly contemporaneous with the great glaciation of northern Europe. The upper fluviatile deposits contain a mixed fauna and were deposited during a long interglacial period. A new glacial phase, rainy at first, produced the clays, which are both alluvial and eluvial. Subsequent uplift and erosion account for the present topography.
Le Carbonifere sur la rive gauche de la Guisane (Hautes-Alpes)
Authors: Feys Robert
Published: June 2020

Describes the geology of a section of the Briancon coal basin, France, as exposed along the left bank of the Guisane. On the whole, the structure is that of a vast syncline, which in detail is actually a succession of folds involving Namurian and Westphalian A, B, and C strata. The coal measures are overlain discordantly by transgressive basal conglomerates (Verrucano), cut by acid intrusions, and faulted. At the eastern border, near Granon, the basin is virtually barren.
Flore et stratigraphie du Carbonifere de la rive gauche de la Guisane (Hautes-Alpes)
Authors: Greber Charles
Published: June 2020

Lists plants from Carboniferous deposits of the left bank of the Guisane in the Briancon basin, France. Four stages can be distinguished on the basis of the flora: Namurian, with Sphenopteris fragilis; Westphalian A, with Neuropteris schlehani; Westphalian B, with Pecopteris pennaeformis; and Westphalian c, with Neuropteris linguaefolia.
Heterosalenia alloiteaui sp. nov. du Jurassique moyen du Liban nord et un cas de croissance excessive de plaques arretant le developpement des zones ambulacraires
Authors: Zoeke Marga E.
Published: June 2020

Describes a new species of echinoid, Heterosalenia alloiteaui, from middle Jurassic (probably Bathonian) deposits in northern Lebanon. One of the specimens shows an abnormal growth of plates, which interfered with development of the ambulacral zones.
Presence de caillasses a Potamides tricarinatus au sommet des calcaires de Saint-Ouen a Herblay (S-et-O.); reflexions sur la valeur stratigraphique et la synchronisation de certains termes bartoniens
Authors: Feugueur Leon
Published: June 2020

Discovery of Potamides tricarinatus at the top of the Saint-Ouen limestones at Herblay, France, has prompted a correlation of the Bartonian facies of the Vexin region (predominantly marine) and the Parisis region (predominantly lacustrine). The Marines sands and Bois du Mulot limestone of the Vexin region correspond to the Monceau sands and Noisy-le-Sec limestones of the Parisis region; the former overlie the Cresnes and Ruel sands, and the latter, the upper Saint-Ouen limestone. The Saint-Ouen limestone of the Vexin region corresponds to the lower Saint-Ouen limestone of the Parisis region.
Sur les structures internes des clypeastres
Authors: Roman Jean
Published: June 2020

Subdivides the genus Clypeaster on the basis of internal structures.
Sur le Quaternaire marin de Mazagan a Mogador et sur la non-existence de l'etage "ouljien" [with discussion]
Authors: Bourcart Jacques
Published: June 2020

A detailed restudy of the Quaternary sections at Jorf er Reraba and Cantin cape reaffirms the conclusion that Quaternary marine deposits along the Atlantic coast of Morocco, between Mazagan and Mogador, are the product of continuous deposition in a synclinal zone which was in process of constant deformation. The so-called Ouljian stage merely represents a series of dunes which were successively sculptured by the wind out of the Quaternary sediments as they became exposed by retreat of the sea.
Quelques Proetidae (trilobites) devoniens du Massif armoricain
Authors: Pillet Jean
Published: June 2020

Describes nine species of Devonian Proetidae from the Armorican massif, France. These species are either new for the region, or hitherto imperfectly known, and bring the total number of Armorican Devonian trilobites to thirty. The subgenera Cornuproetus and Piriproetus are reviewed in detail.
Tectonophysique comparee des chaines telliennes et rifaines
Authors: Glangeaud Louis
Published: June 2020

Correlates the structure and evolution of the Atlas ranges of the Tell and Rif regions and presents a general structural interpretation of the north African coastal region. The Miocene thrusts in the south are local regional adjustments (of the fourth order) to second-order processes occurring farther to the north--compression of the Alps in upper Nummulitic time (Tertiary).
Sur la composition chimique moyenne des amphibolites
Authors: Lapadu-Hargues Pierre
Published: June 2020

In a majority of cases, amphibolites derived from sedimentary rocks can be distinguished from those derived from dioritic or gabbroic igneous rocks on the basis of average chemical composition. From the purely chemical point of view, it is possible to consider that eclogites result from metamorphism of certain types of heteromorphic gabbros such as the ariegites,and ultimately give rise to amphibolitic rocks. Chemical analyses are included.
Sur l'evolution granulometrique des sediments dans le bassin de la Vilaine
Authors: Lafond Louis Robert
Published: June 2020

Granulometric curves of modern sediments of the Vilaine river basin, France, show a transition from parabolic to logarithmic shapes, following Riviere's terminology. The latter obtain only for the fine muds toward the mouth of the estuary. From calculations of the indices of evolution (n), sorting (g), and facies (Ng), the history of the sedimentary material can be followed closely, and apparent anomalies in the curves explained. At least the detrital part (84 percent) of the estuarine muds of the Vilaine is of fluviatile rather than marine origin.
Faunule malacologique du Lutetien continental de Sainte-Madeleine (Alpes-Maritimes)
Authors: Jodot Paul
Published: June 2020

Describes the subtropical continental molluscan fauna (eight gastropod species) found at Sainte-Madeleine, Alpes-Maritimes, France, thus completing the data on the Lutetian (Tertiary) stratigraphy of southern France.
A propos du bassin houiller de Lons-le-Saunier [with discussion]
Authors: Friedel Edmond
Published: June 2020

A brief summary of the results to date of cooperative exploration of the Lons-le-Saunier coal basin in Alsace, France, by several French government organizations. The coals are lower and middle Stephanian (Carboniferous) in age. The basin trends in an east-west direction, and is bounded by faults approximately parallel to the axial direction of surface folds or, more probably, to the Bresse subsidence fault.
Les filons clastiques "intraformationnels" du "flysch" numidien tunisien
Authors: Gottis Charles
Published: June 2020

Describes some of the most typical of the intraformational sandstone dikes in the Numidian Flysch (Tertiary) deposits of the Kroumirie region, Tunisia. The dikes originate in sandy strata, and the youngest bed which they traverse is always argillaceous and always succeeded by a sandy layer. The fissures occupied by the dikes are attributed to earthquake shocks accompanying uplift of the adjacent land mass, which in turn caused the change in sedimentation.
La classification des Phacopacea (trilobites)
Authors: Pillet Jean
Published: June 2020

Proposes a new classification of the Phacopacea, in which three new subfamilies (Chasmopsinae, Eomonoracheinae, and Coronurinae) are created, and several subfamilies elevated to the rank of family. Five new genera and subgenera are described.
Observations sedimentologiques sur la cote de la Coubre (Charente-Maritime) et son voisinage
Authors: Fridman Ruth
Published: June 2020

Along the Coubre coast, Charente-Maritime, France, two distinct sedimentation zones are juxtaposed--from Arvert point to the vicinity of Pavillon, sedimentation is relatively stable; farther south, in spite of contribution by the Gironde, erosion predominates. A large part of the fine beach sediments has been derived locally. Among the ephemeral beach phenomena are some which appear to be analogous to large ripple marks or beach cusps, and which seem to be controlled by local conditions of slope and angle of wind and waves.
La formation a Microcodium au pourtour de l'Argentera-Mercantour
Authors: Faure-Muret Anne , Fallot Paul
Published: June 2020

Discusses the stratigraphic position of Microcodium- bearing formations in the border zone of the Argentera-Mercantour massif in the French Alps, and argues in favor of an organic (algal) origin for Microcodium, which appeared in the upper Senonian (Cretaceous) and persisted, in places, until the middle or upper Lutetian (Eocene).
Etude geologique et petrographique du sill de Mirefleurs (Comte d'Auvergne)
Authors: Michel Robert
Published: June 2020

Geologic and petrographic study shows that the Mirefleurs lava sill southeast of Clermont-Ferrand, France, is a haueynite andesite, probably of upper Stampian (Tertiary) age. The lava is considered to have been derived from a relatively deep andesitic magma which at the same time gave rise to the peperites in upper Stampian lacustrine sediments of Limagne, as well as to surface flows. Three chemical analyses are included.
Note preliminaire sur la glaciation infra-cambrienne dans le massif armoricain
Authors: Graindor Maurice J.
Published: June 2020

The Infracambrian tillite in the Brioverian of the Armorican massif of Normandy, France, is part of a complex extending from Granville to Caen. The Maine conglomerates are the result of reworking of this tillite, and the Gourin conglomerate is derived from it indirectly. The relative ages of these and other conglomerates of the region are tentatively worked out. Four divisions are distinguished in the Brioverian of Normandy; the upper member is the tillite complex with its associated postglacial deposits (Laize stage).
Niveau a coprolithes de crustaces
Authors: Cuvillier Jean
Published: June 2020

Cites a number of brackish to lacustrine formations, of Liassic, uppermost Jurassic, and Neocomian (Cretaceous) age, which contain crustacean coprolites (mainly in Aquitaine, France, and north Africa).
La flore des argiles de Coulgens (Charente) [with discussion]
Authors: Depape Georges , Florschuetz Frans , Guillien Yves
Published: June 2020

An account of the position of the lacustrine sands and clays of Coulgens, Charente, France, which were deposited on a topographic surface in the process of rejuvenation, and the fossil flora found in the clays. Pollen analyses of one of the clays correspond to the Reuver type (upper Pliocene of the Netherlands).
Apports sedimentaires en suspension dans la Loire (annee 1953) [with discussion]
Authors: Berthois Leopold , Barbier Maurice
Published: June 2020

Presents and analyzes the results of measurements of the sediment load of the Loire river, France, and its relation to volume. Of the total of 421,891 metric tons of material carried in 1953, 67 percent was carried during January and February, when discharge was greatest.
Geologie des sables alveolaires de l'ancien monde [with discussion]
Authors: Baudoin Rene
Published: June 2020

In Europe alveolar sands frequently occur in tidal zones of areas between 30 degrees to 50 degrees N. latitude. Their formation is generally attributed to wave action, but other factors, such as decrease in surface tension and the activity of burrowing animals, are also important.
Fossiles du Jurassique superieur et des "gres de Nubie" de la region de Sana (Yemen)
Authors: Basse Eliane , Alloiteau James , Karrenberg Herbert , Lefranc Jean Phillipe , Lehman Jean Pierre
Published: June 2020

Gives the stratigraphy and inferred history of the Mesozoic sediments underlying the Nubian sandstone in Yemen and describes faunas from four zones, including a new Jurassic fish (Pleuropholis bassei), Jurassic invertebrates (including the new pelecypod Lopha karrenbergi, the new gastropod Cryptoplocus yemenensis, and three new corals, Favitopsis harrensis n.sp., Microphyllastraea karrenbergi n.g. n.sp., and Plesiophyllum harrensis n.g. n.sp.), and gastropods from the Nubian sandstone.
Nouvelles considerations sur la tectonique de l'Anatolie (Turquie, Asie Mineure)
Authors: Pinar Nuriye , Lahn Ervin
Published: June 2020

The folded regions of northern and southern Anatolia, Turkey, consist of Alpine structures involving the same stratigraphic sequence and manner of deformation; they are fundamentally similar to the European Alps. Post-Alpine epeirogenic structures, with which the seismic activity and late Tertiary and Quaternary volcanism of the region are related, are particularly well developed in Anatolia, often to an extent that orogenic structures are obscured.
Quelques formes nouvelles de polypiers et de foraminiferes de l'Oligocene et du Miocene du NW de la Grece
Authors: Brunn Jan Houghton , Pierre Chevalier Jean , Marie Pierre
Published: June 2020

An account of the stratigraphy (by Brunn), corals (by Chevalier), and the microfauna (by Marie) of the thick sequence of posttectonic detrital Oligocene and Miocene deposits of northwestern Greece. Descriptions of the corals Favites oligocenica n.sp., Favia pentalofonensis n.sp., Pindosmilia brunni n.g. n.sp., and Siderofungia graeciae n.sp., and the foraminifer Austrotrillina brunni n.sp. are included.
Remarques sur la correlation des unites penniques externes entre la Savoie et le Valais et sur l'origine des nappes prealpines
Authors: Trumpy Rodolphe
Published: June 2020

Discusses the tectonic relationships of Pennine structural elements and the sources of Prealpine nappes in the Savoy (France)-Valais (Switzerland) region. The source of the central Prealpine nappe seems to have been in the Subbrianconnais-outer Brianconnais zone. Plastic elements were thrust along Carnic (Triassic) gypsum beds, whereas rigid elements were dislocated along Werfenian (Triassic) gypsum. Between the Ultradauphinois- Ultrahelvetic and the Subbrianconnais zones, north of the Arc river, lies the Valais zone which had an independent paleogeographic history. The source of the upper Prealpine nappes is still uncertain.
Essai d'une methode graphique de calculs petrochimiques
Authors: Deicha Georges
Published: June 2020

Demonstrates a simple method of geometric representation of chemical analyses of rocks by weight, which can be used for rapid graphic calculation of molecular petrochemical relations. The method is particularly useful for determining Niggli values.
Sur quelques microorganismes des silex cretaces du Magdalenien de Saint-Amand (Cher)
Authors: Valensi Lionel
Published: June 2020

Describes several hystrichospherids from prehistoric (Magdalenian) artifacts found near Saint-Amand, Cher, France. The microfossils indicate that the flint from which the artifacts were made is Cretaceous in age. The following species are new: Hystrichosphaeridium rhopalophorum, H. tridactylites, H. huguonioti, and Micrhystridium fucosum.
Description de quelques bryozoaires des calcaires de Montainville et de Vigny (Seine-et-Oise)
Authors: Balavoine Pierre
Published: June 2020

Describes bryozoans from basal Eocene limestones of Montainville and Vigny, Seine-et-Oise, France, including the new species Membraniporidra montainvillensis, Steraechmella vignyensis, and Trypostega flabellata.
Note sur le genre Heteraster
Authors: Devries Andre
Published: June 2020

Classification of the echinoid genera Heteraster and Enallaster is revised on the basis of the shape and arrangement of the ambulacral pores and the shape of the periproct.
L'autochtone sud-tellien; a propos d'hypotheses recentes
Authors: Calembert Leon
Published: June 2020

Concludes that the Jurassic and Cretaceous massifs of the southern Tell region, Algeria, are autochthonous masses which constitute an independent unit whose development can be explained by gravitational flow. The concept of a zone of overthrust in the Paleozoic basement is superfluous and a probable source of confusion to future investigations.
Sur la radioactivite de sediments actuels et recents de la cote mediterraneenne; etude particuliere du golfe du Lion; interpretation sedimentologique [with discussion]
Authors: Riviere Andre
Published: June 2020

Gamma-ray measurements on modern beach sands of the Lions gulf, France, can be interpreted as a function of their granulometric and mineralogic composition; thus radioactivity measurements provide a new sedimentologic tool. The procedure is described, and problems posed by certain aberrant measurements are discussed.
Sur quelques echinides fossiles etrangers
Authors: Jeannet Alphonse
Published: June 2020

Three echinoids are described--Tithonia arctica n.sp. from the Valanginian (Cretaceous) of eastern Greenland, Leiocidaris thiebaudi n.sp. from the Albian (Cretaceous) of Catunbela near Lobito, Angola, and Parasalenia cf. poehlii from the Pliocene of Erromango in the New Hebrides (southwest Pacific).
Quelques brachiopodes nouveaux ou rares du Devonien marocain
Authors: Drot Jeannine
Published: June 2020

Describes three new or rare Devonian brachiopods from Morocco--Plectodonta minor, Ambocoelia rogeri n.sp., and Plectorhynchella roemeri.
Etude geologique, mineralogique et structurale des gisements et minerais de chrome du massif de Tiebaghi (Nouvelle- Caledonie)
Authors: Caillere Simonne , Kraut F. , Routhier P.
Published: June 2020

Field and laboratory study of the chrome ores of the Tiebaghi massif New Caledonia shows that they are really chromopicotites, that the gangue was originally a dunite, and that segregation of the chromite was an early process which was contemporaneous with the differentiation into layers of the surrounding harzburgites. The peridotite was at least in part later than the chromite; serpentinization was definitely later. For mining purposes the banding of the peridotites can be taken as a guide to the mineralization. Microscopic structures in the chromiferous bodies are shown to be related to large-scale geologic features.
Facies et nature de la sedimentation dans les bassins de la Loukouni et du Djoue (region du Niari, A.E.F.)
Authors: Riedel Alfredo
Published: June 2020

The numerous and varied facies in the "Schisto-calcaire" and the "Schisto-greseux" series in the Loukouni and Djoue river basins in the Niari region, French Equatorial Africa, are analyzed and the broad regional stages established. The Schisto-calcaire (mainly more or less magnesian limestones and marls) is divided into six stages representing transition from deposition in an epineritic shelf environment toward calcareous sedimentation in shallow water. Correlations can be drawn with similar beds in the Belgian Congo. The Schisto- greseux (mainly arkosic sandstone) is divided into the M'Pioka and Inkisi series. The series are characterized by relatively uniform facies which indicate deposition in a transitional (fluvial-lagoonal-littoral) environment within an intracratonic basin.
Le substratum organique dans les depots calcaires, sa signification
Authors: Nesteroff Wladimir D.
Published: June 2020

From the residues left after decalcification, it is possible in most cases to determine whether a limestone is biogenic in origin or the product of physicochemical processes. The bacterial origin of the cementing material of beach rock in the Red Sea region and of Tenaera-bearing structures of the French Mediterranean coast can be demonstrated.
Les nappes phreatiques et artesiennes du Jura septentrional (dept du Doubs); leurs relations avec les reseaux karstiques
Authors: Glangeaud Louis , Francois Solange , Perrenoud Marie Jeanne , Pezard Robert , Toitot Michel
Published: June 2020

Discusses the exploration and exploitation of ground-water zones in the northern Jura region, France. Phreatic waters occur in Tertiary and Quaternary beds, and artesian aquifers in Mesozoic formations. The source, circulation, and recovery of waters in the karst and overlying alluvial deposits are treated in some detail.
Emmanuel de Martonne (1873-1955)
Authors: Dresch Jean
Published: June 2020

Biography and bibliography of the French geomorphologist de Martonne.
Etudes de seismicite artificielle sous-marine (methode de reflexion) dans la baie d'Alger
Authors: Muraour Pierre
Published: June 2020

Describes underwater seismic surveys in the Algiers bay region. Two layers, thickening toward the north-northeast, overlie the metamorphic basement--a layer of Recent sediments underlain by a layer of material considered lower Miocene in age.
Sur les Permosoma du Djebel Tebaga (Permien de l'extreme-sud tunisien)
Authors: Termier Henri , Termier G.
Published: June 2020

Discusses the coral genus Permosoma in the light of several specimens collected from Permian deposits of the Tebaga massif in southernmost Tunisia. The openings are true opercula, resembling those of Khmeria problematica from Cambodia. Both are difficult to classify on the basis of present knowledge.
Observations sur les niveaux a charophytes de l'Aptien des monts des Oulad-Nail (Atlas saharien, Algerie)
Authors: Emberger Jacques , Magne J.
Published: June 2020

With slow retreat of the Aptian sea from the Oulad Naiel mountain region, Algeria, lagoonal- marine beds graded into continental Albian (Cretaceous) deposits. The transitional zone contains remains of charophytes; these plants, considered lacustrine, are here associated with foraminifers, showing that they had become adapted to a brackish-water environment like the modern characeans. The marshy emergent coast of that time was comparable to the Cape Hatteras region of today. The charophyte flora is described.
Correlation chronologique des phenomenes geodynamiques dans les Alpes, l'Apennin et l'Atlas nord-africain
Authors: Glangeaud Louis
Published: June 2020

A new concept of the evolution of the entire Alpine system is presented, based on a comparative study of chronodiagrams for the ranges bordering the Mediterranean both in Europe and Africa. The relation of post-paroxysmal (Miocene) nappes and Plio-Quaternary deformation to the main orogeny, the mechanism of the Mediterranean tectorogen, and some seeming anomalies are explained. A selected bibliography is appended.
Nouvelles donnees sur le flysch a helminthoides de la Ligurie occidentale (Italie)
Authors: Lanteaume Marcel
Published: June 2020

Outlines the stratigraphy and facies variations of helminthoid-bearing Flysch deposits of western Liguria, Italy, on the basis of abundant microfaunas. The evidence favors a Cretaceous age for the deposits.
Stromatorhiza Bakalow, stromatoporoide du Jurassique superieur
Authors: Hudson Robert George Spencer
Published: June 2020

Reexamination of the lectotype of Thamnaraea? granulosa, genotype of Stromatorhiza, shows it to be a stromatoporoid. Astrostylopsis is considered to be a more recent synonym of Stromatorhiza. The genus is established as the type of a new family, the Stromatorhizidae, to which also belong the genus Trupetostromaria and certain Liassic forms classified with the spongiomorphs by LeMaitre.
Note preliminaire sur le niveau marin de 3 m et les series dunaires de l'extreme sud de Madagascar
Authors: Battistini Rene
Published: June 2020

A preliminary report on Quaternary shore lines and dune systems of the extreme southern part of Madagascar. Consolidated beach deposits three meters above present sea level are attributed to a stillstand (here named the Karimbolian) which occurred prior to the pre-Flandrian regression. This three-meter level acts as a marker zone for identifying periods of dune formation. Present knowledge of the Quaternary history of the region is summed up in a table correlating climates, cycles of erosion and continental sedimentation, shore lines, and phases of dune formation.
Essai de correlations stratigraphiques en Grece occidentale
Authors: Aubouin Jean
Published: June 2020

Describes the stratigraphic series of each of the structural elements of western Greece. From west to east these elements comprise the Paxos zone (marginal to the stable Apulian block), the Ionian trough, the Gavrovo fold, the Pindus trough, and the sub-Pelagonian zone (marginal to the Pelagonian ridge). Orogenic activity began in lower Cretaceous time in the fundamentally unstable Pelagonian ridge and progressed westward toward the continental (cratonic) Apulian block. The Pindus trough was a eugeosyncline (with ophiolites), the Ionian trough a miogeosyncline (without ophiolites); the Pelagonian and Gavrovo ridges are sialic.
Quelques problemes de paleogeographie alpine
Authors: Trumpy Rodolphe
Published: June 2020

A criticism of the theory of embryonic precursory folding in the Alps, based on some examples from Helvetic, Pennine, and Prealpine zones in Switzerland and Savoy, France. The importance of Mesozoic flexures and faults is stressed, as well as the absence of any indications of tangential crustal movements before the Cretaceous and the presence of evidence proving the instability of the paleogeographic elements of the Alpine zone. The thick masses of Alpine schists are not mainly "comprehensive series," but deposits accumulated rapidly in a relatively brief period of time. The essential characteristic of the Alpine geosyncline was mobility rather than subsidence.
Une serie subbrianconnaise typique; la serie de Piolit (Hautes-Alpes)
Authors: Latreille Michel
Published: June 2020

Detailed analysis of the Piolit series in the Piolit massif, Hautes-Alpes, France, a typical Subbrianconnais series, shows that in spite of continuous submergence, an important post- Oxfordian, pre-Tithonian (Jurassic) hiatus is present in the sequence. Berriasian strata identified in the sequence represent the first known occurrence in the intra-Alpine domain. The overlying beds are continuous but telescoped at the Infracretaceous-lower Cretaceous boundary. The late Cretaceous-lower Eocene beds correspond to a fine-grained flysch sediment. The Subbrianconnais Piolit series is distinct from the contiguous Ultradauphinois and Brianconnais zones to the west and east respectively.
Sur un banc consolide flandrien dans l'estuaire de la Loire
Authors: Berthois Leopold
Published: June 2020

A consolidated ledge from which material was obtained during dredging in the Loire estuary, France, is attributed to the Flandrian (Pleistocene), partly on the basis of its position below modern sediments, partly on the basis of its lithology.
Esquisse geologique de l'Arabie seoudite
Authors: Karpoff Roman
Published: June 2020

An outline of the geology of Saudi Arabia. The Precambrian basement consists of two distinct series. The Medina series, the older, includes rocks metamorphosed to different stages (sericite schists, gneisses, and migmatites), with numerous lava flows, particularly in the western part. Various granites and dike rocks intrude the Medina but not the Wadi Fatima series lying discordantly above it. The Wadi Fatima is folded and contains three local stromatolitic zones. The Paleozoic is represented in the north by rocks exhibiting a typical Saharan facies. Marine Muschelkalk (Triassic) beds and Jurassic formations (beginning with Toarcian) cover a large area. The most important Cretaceous transgression occurred in the Maestrichtian, when a gulf extended to the Djeddah region. The grabens of central Arabia appear to be related to the formation of the Red Sea depression during Mio-Pliocene time.
La peperite a ciment de diatomite de la montagne d'Andance (massif du Coiron, Ardeche)
Authors: Grangeon Pierre , Michel R.
Published: June 2020

Detailed petrographic study (with a chemical analysis) of the upper Miocene peperite forming the west slope of Andance mountain in the Coiron massif, Ardeche, France. The peperite was formed when a basaltic (basanitoid) lava was intruded into diatomaceous muds of a lava-dammed lake. The ensuing underwater eruption was accompanied by ejection of "intraformational" volcanic bombs.
Aspects hydrogeologiques compares des zones arides du bassin mediterraneen et du NE du Bresil
Authors: Stretta Etienne , Taltasse P.
Published: June 2020

A comparative study of the arid zones of the Mediterranean basin and northeastern Brazil shows how the hydrologic conditions of a region are more closely related to the structure of sedimentary basins than to rainfall.
Un profil des gres vosgiens le long de la vallee de la Meurthe
Authors: Clin Michel , Laugier R. , Millot G.
Published: June 2020

Closely spaced borings for ground water in the Meurthe valley between Baccarat and Luneville, France, show that the dip of the Vosgian sandstones (Triassic) is variable, a fact which is attributed to northeastsouthwest faults rather than to flexures. The water table in the sandstones is well protected from infiltration of saline water from overlying middle Muschelkalk (Triassic) beds; however, a periodic increase in salinity at Chenevieres may be due to leaching of a middle Muschelkalk bed.
Quelques resultats des sondages executes en Savoie par la Regie autonome des Petroles
Authors: Michel Pierre , Caillon G.
Published: June 2020

Presents the results of exploratory borings around two anticlines in Savoy, France (the Age and Gros Foug-Montagne des Princes massifs). Important stratigraphic information and precise structural data were obtained. Three types were distinguished among the oil indications--Molasse (Tertiary), both paraffinic and naphthenic; Urgonian (Cretaceous), slightly naphthenic; and Berriasian (Jurassic), paraffinic.
Micropaleontologie des silex du Grand Pressigny
Authors: Valensi Lionel
Published: June 2020

A description of the petrographic characteristics and microfauna of flints of the Grand Pressigny region, France. Similar flints have also been found as prehistoric implements in widely distant localities. Some of the yellow flints are exceptionally rich in Miliolidae. The microfauna confirms an upper Cretaceous age for the flints.
La "double faille de la Marne" [with discussion]
Authors: Stchepinsky Vladimir
Published: June 2020

Reports the results of a detailed study of the so-called double fault of the Marne, a north-south fault graben extending from the Saulx-Ornain valley region (Marne) in the north to Flammerecourt (Haute-Marne), France, in the south. North of the Paris-Strasbourg highway, the graben becomes a fault-zone depression more than five kilometers wide and convex toward the west. This suggests the presence of a deep Hercynian obstacle and also explains the presence of transverse (or radial) faults in the northern sector.
Nouvelles donnees sur le Jurassique superieur et le Cretace inferieur du Chenoua (Nord-Algerois)
Authors: Durand Delga Michel
Published: June 2020

Reports new data on upper Jurassic and lower Cretaceous formations of the Chenoua promontory in northern Algeria. The tectonic juxtaposition of Cretaceous formations originally deposited in widely separated basins and other structural and stratigraphic relationships are noted.
Sur les caracteres de la sedimentation des geosynclinaux mesozoiques [with discussion]
Authors: Colom Guillermo
Published: June 2020

The microfaunal associations of Jurassic and Cretaceous formations of the Betic cordillera and the Balearic islands, Spain, are planktonic. Of themselves, they have no bathymetric significance, but they occur consistently in deposits containing no detrital material, characterized by limy-marly facies, which is proof that the deposits were laid down in a broad geosyncline. It is therefore possible to recognize Mesozoic geosynclinal formations, in spite of contrary opinions.
Deux trouvailles de ceratites dans le "calcaire coquillier" lorrain
Authors: Maubeuge Pierre L.
Published: June 2020

Describes Progonoceratites saraviensis n.sp. from the basal zone of the Ceratites limestone of the Triassic limestone complex of Lorraine, France, and discusses its paleogeographic and paleoecologic significance. The cephalopod is considered to have been a member of an abundant population which inhabited a marine bottom and which perished catastrophically. The thanatocoenosis constitutes further proof of the rhythmic character of sedimentation of the Triassic limestones.
Etude structurale d'un micropli du synclinal de Saint-Disdier-en-Devoluy (Hautes-Alpes)
Authors: Albissin Micheline d'
Published: June 2020

A microfold has been observed in Tithonian (Jurassic) limestone of the northeastern margin of the Saint-Disdier-en-Devoluy syncline in the French Alps. In the plane perpendicular to its axis, the microfold is characterized by a series of stylolitic joints mainly oriented perpendicularly to the layers in two different planes. Detailed observations of these stylolites and fissures shows that there have been several phases of fissuring and stylolite formation between deposition of the limestone as a horizontal bed and the development of the microfold and that the direction of pressure changed during folding.
Nouvelles observations sur la couverture triasique et son substratum dans la region occidentale des Vosges; les forages de Vittel, Contrexeville et Lamarche; resultats de la campagne de recherche hydrogeologique 1954-1958
Authors: Minoux Georges
Published: June 2020

Describes details of the stratigraphy and ground- water zones of the Permo-Triassic sequence of the western Vosges region, France, on the basis of data from new borings (at Vittel, Contrexeville, and Lamarche) in the area northwest of the Faucilles mountains.
Sur la notion de "types" de gisements metalliferes
Authors: Routhier Pierre
Published: June 2020

Limitations of existing classifications of ore deposits are examined, and a new "natural" classificationis proposed, based on "types." The types are based on the mineralogic and geologic characteristics of the ore deposit itself and of the host rock. Among the characteristics to be determined for the ore deposit itself are its hypogene paragenesis, superficial alteration, and the chemical composition and ore content of both the hypogene and supergene ore. The characteristics to be determined for the host rock relate to the lithology and stratigraphy of the enclosing rocks and the presence of contact alteration, if any; the form of the ore body in relation to the structure of the country rock; the nearby presence of igneous rocks; and age, if determinable. Descriptions can be completed by giving a list of examples of similar deposits with their age, if known, and pertinent genetic hypotheses.
Louis Mengaud (1876-1957)
Authors: Casteras Marcel
Published: June 2020

Biography and bibliography of L. Mengaud, who, until his retirement in 1943, occupied the chair of geology in the university at Toulouse.
Emile Haug, 1861-1927
Authors: Lutaud Leon
Published: June 2020

Biography and bibliography of E. Haug, a former president of the French Geological Society. He held the chair of geology at the Sorbonne (Paris) for 23 years.
Contribution a l'etude des temoins d'actions pneumatolytiques d'age alpin; resultats d'observations dans les Alpes lepontiennes
Authors: Deicha Georges A.
Published: June 2020

Volatile constituents are found to occur abundantly in the liquid inclusions in quartz of an area south of the Gotthard massif, in the Lepontine Alps between the Greina and Simplon cols, where Mesozoic sediments have been subjected to strong Alpine metamorphism. Comparisons with neighboring regions suggest that processes of recrystallization can be attributed in large part to soaking by volatile-rich fluids. The petrogenetic and tectonic significance of the presence of fluids rich in CO 2 is discussed.
Schema structural des Alpes maritimes franco-italiennes [with discussion]
Authors: Lanteaume Marcel
Published: June 2020

The structural pattern of the Franco-Italian Maritime Alps is outlined. Autochthonous units include the Argentera-Mercantour massif and a folded sedimentary zone which locally represents the dislocated cover of the massif. The Col de Tende unit is considered parautochthonous. Between the Tende col and the sea is a series of rootless overthrust units which rest either directly, or with an intermediate unit of Nummulitic (Tertiary) schists on the outer margin of the so-called imbricate Ligurian Pennine complex. The paleogeographic development of the region is sketched.
Decouverte d'une roche volcanique (andesite) dans la zone du Flysch des Aiguilles d'Arves
Authors: Barbier Reynold , Michel R.
Published: June 2020

Reports the discovery of a Tertiary andesite flow, probably submarine, at the base of Flysch formations near the Aiguilles d'Arves massif, France. This represents the second known occurrence of volcanic rock in place in the western Alps and clarifies the problem of the origin of the eruptive material in Flysch sandstones.
L'evolution volcano-tectonique du massif du Mont-Dore (Auvergne) pendant le Mio-Pliocene
Authors: Glangeaud Louis , Lemonnier J. C.
Published: June 2020

New surveys based on aerial photographs of the Mont-Dore massif (Auvergne, France) show the position of the network of dikes and their relation to faults, and thus throw light on the evolution of the Bourboule-Mont-Dore caldera and its magmas (trachyandesites). Volcanic-tectonic activity began in the Pontian and terminated in the lower Pliocene. Extrusion of lavas was simultaneous with caldera subsidence, which was contemporaneous with the tectonic processes responsible for orogenic activity in numerous areas borderingthe Alps.