bluuebunny/crossref_metadata_2025 huggingface dataset:
Episodes de sedimentation riche en matiere organique dans les marnes bleues d'age aptien et albien de la partie pelagique du bassin vocontien
Authors: Breheret Jean G.
Published: March 2020

A synthetic section is proposed for the Aptian-Albian blue marls of the Vocontian basin (SE France), in the western part of the Alpine Tethys sea. In spite of its homogeneous aspect, the section presents a cyclic sedimentation throughout. Rock-Eval pyrolysis data giving total organic carbon and type of organic matter, allows us to sketch the vertical distribution of organic matter. Three major episodes of orgamic rich sedimentation, underlined by some scarce calcareo-phosphatic nodule girdles, are pointed out: (1) Bedoulian (pro parte) at the very base of the formation, (2) Lower and Middle Albian, and (3) Vraconian (lower part). The good preservation of marine organic materials in these sediments is a consequence of anoxia generated by a strong stratification of the water mass. These episodes are not strictly confined to the Vocontian basin, bur are also known in pelagic environments of the Alpine sea and Tethyan domains. They are clearly linked to transgressive pulses. The mechanism that may be involved spilled over into basins of slightly salted waters generated on vast continental platforms like the model proposed by Busson [1984] for genesis of mid-Cretaceous black shales of the northern and central Atlantic.
Limites evenementielles ou limites conventionnelles en stratigraphie?
Authors: Pomerol Charles
Published: March 2020

Most events characterising stratigraphic boundaries span an interval of time. The boundaries are often diachronous and they may be affected by environmental conditions. Therefore, the only accurate way to define a boundary is to select a boundary stratotype which records as many paleontological, geophysical and geochemical events as possible. Conventional stratigraphic boundaries are commonly difficult to identify precisely outside the stratotype area. This is why it is necessary to use first and last appearances of diagnostic features which occur below and above the conventional boundary. In this point of view the Eocene-Oligocene boundary is particularly significant.
Vergnesia morelleti nov. gen., nov. sp., neritide de l'Eocene moyen du bassin de Paris
Authors: Delpey Genevieve
Published: March 2020

Describes Vergnesia morelleti n. g. n. sp., an aberrant gastropod with apparent bilateral symmetry, from the middle Eocene of the Paris basin, France.
Recherches sur le contact entre la Berberie et le Sahara
Authors: Russo P.
Published: March 2020

The great south Atlas fault and the south Aures fault in north Africa together constitute the great north Sahara fault which represents the boundary between Barbary to the north and the Sahara complex to the south. From the Triassic to the Cretaceous the Sahara was relatively higher than Barbary. Uplift to the north of the fault began shortly before the Eocene and increased during successive stages, accompanied by more intensive folding until finally Barbary was a mountainous region more elevated than the Sahara.
Paul Lemoine 1878-1940
Authors: Gignoux Maurice
Published: March 2020

Account of the life and work of Paul Lemoine, French geologist, who not only contributed to the knowledge of the geology of the Paris basin, but, in his early years, also to the geology of Madagascar and Morocco. A chronologic list of his writings is appended.
La virgation sud-rifaine; recherches sur la marge sud du sillon rifain (secteur Haut-Ouergha-Haut-Leben)
Authors: Lacoste Jean
Published: March 2020

Describes the structural units of the region between Haut-Ouergha and Haut-Leben, Morocco, which occurs in the central part of the Rif virgation, a zone of successive differential overthrusts. The tectonic relations of overthrust Jurassic limestone masses and the Mesozoic schist series of the Rif trough (mainly Cretaceous) are discussed in particular.
L'influence du climat sur la composition chimique des eaux souterraines vadoses
Authors: Schoeller H.
Published: March 2020

Discusses the effect of climate on the chemical composition of ground waters. Variations in composition are correlated with the decrease in rainfall and the increase in average temperature from France to the Sahara, and depicted graphically.
L'inversion chez les Lamellibranches
Authors: Dechaseaux Colette
Published: March 2020

Discusses inversion in pelecypods, and concludes that when the inversion characterizes species or genera, it is a mutation; when it is restricted to an individual, it is considered a deviation or an instance of teratology.
L'Elephas recki Dietrich, sa position systematique et ses affinites
Authors: Arambourg Camille
Published: March 2020

Discusses the systematic position and affinities of Elephas recki from early Pleistocene deposits of eastern Africa.
Quelques considerations sur l'evolution des limons
Authors: Brajnikov Boris
Published: March 2020

Discusses the physicochemical features of the milieu of formation, and the evolution of silt deposits.
Bradfordien, Cornbrash et Callovien du Maconnais
Authors: Parent H.
Published: March 2020

Describes the succession of Bradfordian, Cornbrash, and Callovian beds (Jurassic) recently exposed in a road cut in the Macon region, France.
Sur quelques particularites du genre Hippaliosina Canu et sur la presence de H. (Hemieschara) aff. sandbergeri v. Reuss sp. dans les faluns de l'ile d'Oleron
Authors: Gillard Pierre A.
Published: March 2020

Members of the bryozoan genus Hippaliosina migrated toward the equator during the Tertiary. Forms resembling H. sandbergeri from upper Aquitanian deposits of Oleron island in the Bay of Biscay, France, represent the northernmost Miocene representatives in the east Atlantic region.
H. G. Stehlin (1870-1941)
Authors: Viret Jean
Published: March 2020

Biography and list of writings of the Swiss vertebrate paleontologist Stehlin.
Sur les schistes cristallins de la region de Marvejols (Lozere)
Authors: Lapadu-Hargues P.
Published: March 2020

Describes the various crystalline facies of the zone of schists and gneisses in the Marvejols region, France, bordered on the north by the Margeride granite massif and to the east and south by Mesozoic karst terrain, and briefly discusses the structure of the region.
Oscillations de rivage et bathymetrie dans la region sud de la baie du Roi (Spitzberg)
Authors: Romanovsky V.
Published: March 2020

Identifies three abandoned shore lines and a steep submarine slope in the southern Kings bay region, Spitsbergen, whose formation is attributed to several stages of sudden, rapid regression of the sea during uplift subsequent to the melting of the Quaternary ice cap.
Dislocations dans le Quaternaire pres de Bellegarde (Ain)
Authors: Goguel Jean
Published: March 2020

Dislocations in Quaternary moraine deposits exposed in a quarry near Bellegarde, Ain, France, are attributed to collapse caused by melting of buried fossil ice.
Remarques sur le Quaternaire et les tourbieres de la montagne limousine de Millevaches
Authors: Dubois Georges , Dubois Camille
Published: March 2020

Notes on periglacial, peat, and other Quaternary deposits of the Millevaches plateau, Limousin massif region, France, and on the Flandrian (postglacial) forest history of the plateau area.
Observations sur les terrains tertiaires du Bas-Adour
Authors: Fabre A.
Published: March 2020

Study of the stratigraphic relations of Tertiary formations at two localities in the lower Adour river valley, France, indicates that transverse faults are present in the center of the synclinal zone in which they occur.
Sur les methodes granulometriques de sedimentation
Authors: Riviere Andre
Published: March 2020

A summary of the principles and methods of mechanical analyses of sediments and sedimentary rocks, based on the relation of grain size to rate of settling.
Contribution a la connaissance de l'age du flysch des Petites Pyrenees
Authors: Perebaskine V.
Published: March 2020

Although poorly preserved, ammonites from lower Flysch strata in a boring at Saint-Marcet in the French Pyrenees could be identified almost certainly as Lyrtoceras sicardi. They indicate a Santonian (Cretaceous) age for the enclosing beds.
Les facies du Chattien et de l'Aquitanien dans la basse vallee du Ciron (Gironde)
Authors: Lubet P.
Published: March 2020

Discusses the facies, thickness, and boundaries of Chattian and Aquitanian (Oligocene) deposits in the lower Ciron valley, Gironde, France, with special reference to the contemporaneity of certain brackishwater and lacustrine sediments.
Sur les roches a grunerite et cummingtonite du Gabon central (A. E. F.)
Authors: Choubert Boris
Published: March 2020

Grunerite-bearing rocks of the central Gabon region, French Equatorial Africa, are amphibolites, in which cummingtonite and hudsonite accompany the grunerite, and pyroxenites characterized by the predominance of hypersthene. Anorthosites are generally associated with the amphibolites and pyroxenites. Chemical analyses indicate that all three groups constitute an entity rich in iron and poor in alkalis. The rocks are considered differentiation products of a basalt magma, which were later recrystallized.
Sur la geologie du massif de Plate (Haute-Savoie)
Authors: Feugueur Leon
Published: March 2020

Discusses the Nummulitic (Tertiary) stratigraphy of the Araches plateau and the Cretaceous-Eocene stratigraphy and structure of the Arbaron mountain which rises above the plateau, in the Plate massif region, France. Both the plateau and the mountain belong to the Morcles nappe, but are nevertheless independent tectonic units. The Arbaron massif is a recumbent fold.
De criteres permettant de determiner le mode de formation des filons a bords paralleles; injection ou remplacement
Authors: Perrin Rene , Roubault M.
Published: March 2020

Outlines criteria for determining whether veins and dikes with sharp contacts were formed by replacement or injection.
Les caracteres structuraux du Jura [with discussion]
Authors: Glangeaud Louis
Published: March 2020

Several phases of dislocation and folding, with intercalated periods of erosion, took place during formation of the Jura mountains, and two major types of structures were developed. Formation of the range began in the Eocene; pre-Pontian (mainly Oligocene) crustal movements determined the orientation of the folds, particularly in the outer zone.
L'evolution de l'Ardenne au cours des diverses phases des plissements caledoniens et hercyniens
Authors: Waterlot Gerard
Published: March 2020

The Ardennes region was subjected to three successive phases of Caledonian (early Paleozoic) orogenic activity during which large-scale gentle crustal movements directed from south to north caused uplift of the upper Ardennes region at the beginning of the Caradocian (Ordovician), of the southern Condroz region (France) at the end of the lower Ludlow (Silurian), and of the northern Condroz and Brabant (Belgium) regions in the lower Devonian. Hercynian (late Paleozoic) structures of the region are the product of intense deformation of pre-existing synclinal basins which were formed during a long pre-Hercynian period of gentle crustal movements.
A propos de deux fossiles des phosphorites du Quercy, Enigmatosaurus bottii (G. de Stefano 1903) et Amphignathodon sp. J. Piveteau 1927
Authors: Hoffstetter R.
Published: March 2020

Concludes that Enigmatosaurus bottii from Tertiary phosphate beds of the Quercy basin, France, is not a saurian reptile but an anuran amphibian, and that Amphignatodon sp. is not an amphibian, but a reptile.
Sur la distribution de l'oxygene dans la lithosphere
Authors: Brajnikov Boris
Published: March 2020

Discusses the problem of the distribution of oxygen in the lithosphere from the point of view of the absolute amount of oxygen in rocks and minerals contained in a cubic centimeter and concludes that the absolute content remains constant with depth and that there may be rocks impermeable to solutions, but not to ions.
Les roches eruptives des environs d'Azgour dans l'Atlas de Marrakech, Maroc
Authors: Raguin Eugene
Published: March 2020

Describes the rocks associated with two periods of igneous activity distinguished in the Azgour area in the Atlas mountains, Morocco--Cambrian lavas, now metamorphosed, and granites of a Hercynian (late Paleozoic) batholith--and discusses the mineralization (molybdenite, chalcopyrite, and minor pyrite) of the area, concluding that it was postgranitic or genetically related with the final stage of igneous activity.
Note sur quelques roches metamorphisees au contact des dolerites de la Guinee francaise
Authors: Jeremine Elisabeth
Published: March 2020

Describes metamorphic rocks from the contact zone of Devonian dolerite dikes and sills in Guinea, French West Africa, noting that the alteration accompanying emplacement of the dolerites is similar to that produced by intrusion of granite.
Cretace superieur et Tertiaire des Hautes-Pyrenees entre les vallees de l'Adour et de l'Arret
Authors: Reyre Dominique
Published: March 2020

Discusses the upper Cretaceous-Eocene succession in the Pyrenees between the Adour and Arret valleys, France, with special reference to microbreccias intercalated in several places in the upper Cretaceous, whose formation is considered due to repeated movement along a fault in the basement structure.
Les associations de mineraux lourds dans les limons quaternaires du bassin de Paris
Authors: Duplaix Solange , Malterre H.
Published: March 2020

Distinguishes three principal groups of heavy mineral assemblages in Quaternary silts of the Paris basin, France--epidote-amphibole-garnet, zircon-epidote-rutile, tourmaline-staurolite-zircon.
Sur le Neogene et le Quaternaire des Abda, Doukkala et Chaouia (Maroc occidental)
Authors: Gigout Marcel
Published: March 2020

On the basis of a study of Quaternary consolidated dunes and exposures of Tertiary tuffs and conglomerates, considered to represent a Pliocene marine cycle, in the Abda-Doukkala-Chaouia region along the west coast of Morocco, outlines the Pliocene-Quaternary history of the region.
Le materiel alluvial de la Gartempe aux environs de Saint-Savin (Vienne)
Authors: Gardet G.
Published: March 2020

An account of the alluvial flood-plain and terrace deposits of the Gartempe river in the vicinity of Saint-Savin, Vienne, France. Deposits associated with three fluvial terraces are distinguished.
Sur deux ammonites nouvelles du Coniacien du sud-ouest de Madagascar, Subbarroisiceras n.g. mahafalense n.sp. et Eboroceras n.g. magnumbilicatum n.sp
Authors: Basse Eliane
Published: March 2020

Describes the ammonites Subbarroisiceras mahafalense n.g. n.sp. and Eboroceras magnumbilicatum n.g. n.sp. from Coniacian (Cretaceous) deposits of southwestern Madagascar.
Les pointements cretaces de Saint-Lon-les-Mines et de Belus (Landes)
Authors: Burger J. J. , Cuvillier J.
Published: March 2020

Discusses the stratigraphic sequence and structural relations of Cretaceous beds outcropping at Saint-Lon-les-Mines and Belus in the Nummulitic (Tertiary) terrain of the Bassecq basin, France.
Contribution petrologique a la classification des limons d'Oissel
Authors: Duplaix Solange
Published: March 2020

Heavy mineral analyses of material from different levels in Pleistocene sandy loams exposed in a quarry in the Oissel area south of Rouen, France, revealed qualitative and quantitative differences, indicating that in addition to the concentration of heavy minerals caused by reworking of the deposits in place, additional material was supplied from other sources at different stages.
A propos du pretendu metamorphisme du Trias autochtone alpin [with discussion]
Authors: Lugeon Maurice.
Published: March 2020

Describes exposures at numerous localities in the French and Swiss Alps in which the contact between beds of known Triassic age and underlying Hercynian (Paleozoic) crystalline rocks can be observed. Evidence is presented in support of the concept that arkosic strata in the contact represent indurated material which had been produced by weathering of the Hercynian peneplain prior to deposition of the Triassic beds. It is concluded that Hercynian masses of the Alps were metamorphosed prior to the Mesozoic and not, as has been proposed by some, by magmatic- metamorphic processes during the Alpine orogeny, which are also considered to have affected part of the Triassic.
Facies, epaisseur des sediments et paleogeographie dans le Bas-Sahara pendant les temps secondaires
Authors: Laffitte R.
Published: March 2020

During the Mesozoic the Sahara basin south of the Atlas mountains in eastern Algeria and southern Tunisia (now below sea level) was essentially a shallow gulf separated from the open sea by two topographic highs.
Roches et assemblages cristallins
Authors: Deicha Georges
Published: March 2020

Discusses the growth and interrelationships of crystals in rocks and crystalline aggregates formed during a single crystallization process and concludes that crystallogenetic disequilibria and intracrystalline forces are significant factors in determining crystal growth and the development of twinning.
Bandes siphonales, piliers et siphons des rudistes
Authors: Dechaseaux Colette
Published: March 2020

Study of the siphonal bands and longitudinal tubular processes of rudistid pelecypod shells leads to the conclusion that rudistids did not have long siphons. On the basis of present knowledge, however, it is not possible to determine whether the shell had an open or closed mantle.
Concretions quartzeuses d'origine pedologique
Authors: Cailleux Andre
Published: March 2020

Quartz and quartzine concretions found in surface deposits of the Charente region, France, are considered a product of soil-forming processes which took place after the Eocene and prior, at least in part, to the Riss-Wuerm interglacial period. Similar concretions of smaller size occur in numerous French localities and in Lebanon. They are always found in areas where the terrain or the basement is composed of limestone. Primary and secondary occurrences can be distinguished. The concretions are considered a normal constituent of certain soils in the same way that loess dolls are characteristic of certain soils developed on loess.
Observations sur les "stipites" de Balmarelesse (Aveyron)
Authors: Bergounioux Frederic Marie , Doubinger Jeanne
Published: March 2020

The Jurassic coal of the Balmarelesse field, Aveyron, France, is composed of a bright component which cannot be classed either as vitrain or clarain, but which is probably a form of vitrain whose development was arrested, and a dull component containing typical fusain. The coal is difficult to classify because various of its properties are similar to those of several coal types. It is definitely not a lignite. The name stipite, previously proposed for the Balmarelesse coal, should therefore be retained to designate its classification.
Le regime hydro-geologique des calcaires eocenes du synclinal du Dyr el Kef (Tunisie)
Authors: Schoeller Henri
Published: March 2020

Measurements of the flow of the Kef spring, the only point of emergence of water from Eocene limestones of the Dyr el Kef synclinal basin, Tunisia, together with data on precipitation, show that two hydraulic systems operate within the limestone aquifer. The limestones are exposed over a considerable area, and because of the almost complete absence of vegetation, the intake coefficient is high.
Observations sur les gres carboniferes de Montmartin-sur-Mer (Manche)
Authors: Dangeard Louis , Berthois L.
Published: March 2020

Microscope examination of sandstones, previously considered Cambrian in age, which occur below Visean (Carboniferous) limestones of the Montmartin- sur-Mer region, Manche, France, confirms the Carboniferous age recently proposed for the sandstones.
Considerations sur les relations stratigraphiques du Cartennien et de l'Helvetien dans le bassin miocene d'Hammam-Righa et de Bou-Medfa (Algerie)
Authors: Charles G.
Published: March 2020

Concludes that the Cartennian and Helvetian deposits in the Hammam-Righa-Bou-Medfa Miocene basin, Algeria, represent a continuous, concordant series and that apparent unconformity is due to a local facies of the Helvetian.
Etude mineralogique du minerai de fer oolithique d'Auboue, bassin de Briey
Authors: Caillere Simonne , Kraut F.
Published: March 2020

In general the mineralogic composition of the various zones in the Jurassic oolitic iron ore formation of the Auboue area, Briey basin, France, is the same. The green zone is distinct, however, in that both the oolites and the gangue are chloritic, whereas in the other zones, they are composed of different minerals. Study of the ore showed that organisms played an important role in the development of the ferruginous oolites and that clastic material was of only minor importance.
La tectonique d'ecoulement par gravite et la structure des Alpes [with discussion]
Authors: Gignoux Maurice
Published: March 2020

Discusses theoretical aspects and small-scale models of the formation of nappes and other orogenic structures by gravity flow, which is considered to be related to convection currents at depth, and applies the concept of gravity flow to an interpretation of the structure of the inner zones of the French Alps.
Etude descriptive des series de la riviere Bouenza au Moyen-Congo ou etage bouenzien
Authors: Baud Louis
Published: March 2020

Three zones can be distinguished in the sedimentary deposits overlying the granite of the south flank of the Chaillu massif in the Bouenza river region, French Equatorial Africa. They exhibit a certain lithologic continuity, indicating that they represent a stage, for which the name Bouenzian is proposed, rather than a sedimentary complex as previously described.
Notes phytopaleontologiques sur le Jurassique lorrain
Authors: Maubeuge Pierre L.
Published: March 2020

Describes remains of terrestrial plants from Jurassic deposits of Lorraine, France.
La racine de la nappe du Guil et l'eventail brianconnais
Authors: Goguel Jean
Published: March 2020

The roots of the Guil nappe in the French Alps have been obliterated by later dislocations which produced the fan-shaped group of Briancon thrust slices. The thrust slices were formed in an area of intersection in which nappe emplacement by overthrusting toward the west and later fracturing accompanied by overthrusting to the east took place. The resulting contraction was probably largely responsible for the disappearance of the roots of the nappe.
Types varies de plis de couverture en basse Provence orientale
Authors: Lapparent Albert F. de
Published: March 2020

Describes different types of folds which were developed in the eastern lower Provence region, France, during Tertiary crustal movements in the sedimentary cover capping a structure composed of crystalline rocks and Permian-Werfenian (Triassic) strata--sliced, recumbent, and stretched folds, and anticlines or synclines whose base has been truncated. Restudy of the relation of the folded sedimentary cover to the basement indicates that important fractures are not always necessarily present immediately below highly folded strata of the cover.
La formation gypsifere en Anatolie (Asie Mineure)
Authors: Lahn Ervin
Published: March 2020

Central Anatolia, Turkey, was transformed from a marine area into a closed basin by Alpine crustal movements toward the end of the Eocene. An extensive series of continental and lacustrine deposits, characterized by widely developed gypsum beds, was formed in the basin during the Oligocene, probably at different times in different parts of the basin.
Sur la tectonique du synclinorium median au nord de Rennes
Authors: Philippot Andre
Published: March 2020

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 3 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

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

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

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

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

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

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

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.
Aspects de la morphologie cryonivale dans le midi de la France [with discussion]
Authors: Rondeau Andre
Published: March 2020

Features typical of forms developed by frost action occur on major slopes of the piedmont region of southern France, and indicate that a dry climate obtained in the region in postglacial time. Some of the features described were probably formed relatively recently.
A propos des "Correlations stratigraphiques par microfacies en Aquitaine occidentale" [with discussion]
Authors: Cuvillier Jean
Published: March 2020

Corrects a number of inaccuracies in a work on stratigraphic correlation by microfacies in the western Aquitaine basin, France.
Ampleur des regressions glacioeustatiques
Authors: Cailleux Andre
Published: March 2020

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

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

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.
Description d'un nouveau lamellibranche, Nucula renouardi n. sp. du Portlandien du Liban
Authors: Mongin Denise
Published: March 2020

Describes Nucula renouardi, a new pelecypod from Portlandian (Jurassic) limestones of Lebanon.
Vaugnerites et amphibolites; deux types de roches amphiboliques dans les Cevennes a la hauteur de Largentiere (Ardeche)
Authors: Palm Quirijn A.
Published: March 2020

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

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

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

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 la presence de pyrrhotite de neoformation dans les argiles sedimentaires de Sicile
Authors: Tamayo Eleonora
Published: March 2020

Authigenic pyrrhotite occurs abundantly in lower Tortonian (Tertiary) clays of Sicily, Italy, and is frequently accompanied by pelagic foraminifers.
Sur l'evolution des gneiss des Pyrenees
Authors: Guitard Gerard
Published: March 2020

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

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

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

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.
Les foraminiferes du Pliocene de la Corse
Authors: Le Calvez Yolande
Published: March 2020

Lists the foraminifers identified in marine Pliocene deposits of Corsica, France. The fauna is very similar to that of the Mediterranean coast of France, especially that of Provence, and indicates a Plaisancian age for the enclosing formations.
Albert Michel-Levy (1877-1955)
Authors: Orcel Jean
Published: March 2020

An account of the life and scientific career of the French geologist and regional and experimental petrographer Michel-Levy. A bibliography of 106 titles is appended.
L'Ypresien franco-belge; essai de correlation stratigraphique et micropaleontologique
Authors: Le Calvez Yolande , Feugueur L.
Published: March 2020

An attempt at correlation of the Y presian (Eocene) of France and Belgium, based on comparison of characteristic sections and representative microfaunas.
Sedimentation et paleoceanographie du Turonien et du Senonien dans le bassin du Beausset (Var)
Authors: Blanc Jean J.
Published: March 2020

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

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

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

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

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.