bluuebunny/crossref_metadata_2025 huggingface dataset:
Origine et mode de depot des "sables granitiques" miocenes entre Paris et la Manche
Authors: Pomerol Charles
Published: March 2020

The Lozere granitic sands of the Paris basin, France, Miocene in age, seem to be due to disintegration of granitic shingles and gravels. On the basis of granulometric, mineralogic, and morphoscopic observations three types are recognized: (1) the type Lozere sands, undisturbed deposits whose westernmost occurrence is in the Rouen region; (2) reworked deposits, which extend to the channel coast; (3) reworked deposits with added foreign material (Stampian, Lutetian, but never Armorican), found only between Rouen and Beynes. From the distribution of these types, several details of the geomorphic evolution of the Paris basin are worked out, from the time of their deposition on the lower Miocene peneplain, in Burdigalian times, through the Quaternary.
Sur les affinites des trilobites
Authors: Hupe Pierre
Published: March 2020

Discusses the principal characteristics of the trilobites, particularly those of the cephalon, and concludes that the trilobites are more closely related to the antennates, in particular the tracheates, than to the chelicerates.
L'anticlinal de Roquefort-des-Landes et les pointements cretaces de Creon-Saint-Julien
Authors: Cuvillier Jean , Dupouy-Camet Jacques , Sacal Vincent
Published: March 2020

A stratigraphic, structural, and paleontologic study based on data from recent borings in the Aquitaine basin, France. The Roquefort-des-Landes anticline and various Cretaceous outcrops in the Creon-Saint-Julien region are described; these occur in the central and western portion of a long uplifted zone known as the Roquefort-Creon-Cezan-Lavardens anticlinal swell. Among the details revealed were the presence of 1,500 meters of Triassic strata in the Roquefort anticline, consisting of two lagoonal members separated by marine Muschelkalk, ophitic intrusions in the lower Triassic, the presence of over 1,100 meters of Jurassic beds, grading eastward from a marly and limestone facies to a dolomitic facies, evidence of transgression from west to east through most of the Cretaceous, and the absence of marine Tertiary in the Cezan-Lavardens area.
Macrophthalmus aquensis A. Milne- Edwards et Brocchi 1879, son stade megalope; le genre Macrophthalmus Latreille 1829
Authors: Remy Jean Marcel
Published: March 2020

On the basis of material from Vindobonian (Tertiary) marls of Perrin mountain near Aix-en-Provence, France, describes in detail and illustrates for the first time the Miocene crab Macrophthalmus aquensis (first noted by A. Milne-Edwards and Brocchi in 1879), including the megalope stage. The entire genus is reviewed with respect to its preservation, mode of life, stratigraphic and geographic distribution, and migration.
Note preliminaire sur la faune et un niveau insectifere des lentilles de gres et schistes noirs des gypses de la Vanoise (Trias superieur)
Authors: Ellenberger Francois
Published: March 2020

Describes arthropod remains from black shales interbedded with gypsum on the north slope of the Dent du Villard, Vanoise region, France. The faunal evidence indicates an upper Triassic age for the enclosing beds, confirming previous conclusions based on a rich Equisetum flora. In addition to the new insect species Osmylopsychops radialis, belonging to the family Prohemerobiidae, the estherian Euestheria minuta brodiei is described.
Stratigraphie du Precambrien de l'Oubangui-Chari occidental
Authors: Gerard Georges , Gerard J.
Published: March 2020

The Precambrian of western Ubangi-Shari, French Equatorial Africa, can be divided into four systems, separated by unconformities--the basement complex, highly folded and metamorphosed; the M'Poko system, deposited in two geosynclines, mainly represented by quartzites and schists; the Lobaye system, quartzitic sandstones of continental origin; and the cherty Zinga series, less well-developed, representing silicified deposits which were originally calcareous or dolomitic.
Sur le sens de deversement des nappes de la Montagne Noire [with discussion]
Authors: Geze Bernard , de Sitter L. U. , Truempy Rodolphe
Published: March 2020

Essentially a debate as to the direction of origin of the nappes on the southern slope of the Montagne Noire, France. After presentation of the structural facts, Geze advocates a southern origin; de Sitter and Truempy support a northern provenance. In such an instance of an isolated Hercynian massif, surrounded on three sides by younger formations, both arguments fit the known facts about equally well.
Essai d'interpretation du coefficient de subsidence
Authors: Dreyfuss Maurice
Published: March 2020

From comparison of the subsidence and filling of a given basin, based on values obtained from the coefficient of subsidence, conditions of climate and deformation of adjacent land masses can be deduced. Conclusions are summed up in a table.
Le Valanginien inferieur calcaire du grand canon du Verdon (Basses-Alpes)
Authors: Mongin Denise , Trouve Philippe
Published: March 2020

Describes the lower Valanginian (Cretaceous) stratigraphy of the canyon area of the Verdon river valley in the French Alps and molluscan faunas (including new species) from two localities in the area.
Sur la position systematique de Santaisaurus, reptile du Trias inferieur de Chine
Authors: Hoffstetter Robert
Published: March 2020

Santaisaurus, a lower Triassic reptile from China, is definitely an eosuchian rather than a rhynchocephalian. It cannot be included among the Prolacertidae, but can be assigned to the Prolacertoidea (new superfamily). The discovery of Santaisaurus confirms the close relationship between the lower Triassic continental reptile faunas of China and South Africa.
Sur la presence d'une flore carbonifere dans l'Aier (Sahara central)
Authors: Boureau Edouard
Published: March 2020

Describes a Rhacopteris flora from the southwestern edge of the Aier massif, French West Africa. The plant remains, probably Dinantian (Carboniferous) in age, occur in beds underlying continental sandstones and above crystalline basement rocks.
Zoneographie et age des formations cristallophylliennes des massifs hercyniens francais [with discussion]
Authors: Jung Jean
Published: March 2020

Two types of metamorphic series can be distinguished in the Hercynian (Paleozoic) massifs of France--the Auvergne-Vosges type, grading conformably into a Paleozoic cover, and the Pyrenean-Armorican-Limousin type, overlain unconformably by Devonian and Dinantian (Carboniferous) beds. The stratigraphic relations and metamorphic zoning are studied with respect to the orogenesis of the Hercynian chain. It is concluded that the former type represents cores formed during early Cambrian orogenic activity; the latter type, in ranges peripheral to these cores, was evolved more or less late in the Paleozoic.
Resultats geologiques et micropaleontologiques du sondage d'El Krachem (hauts plateaux algerois); description de quelques especes nouvelles
Authors: Cheylan Gilbert , Sigal Jacques
Published: March 2020

Describes the Miocene and Cretaceous series traversed by a boring at El Krachem in the high plateau region of Algeria, and compares them with beds of the Tellian facies to the north and with those of the Atlas ranges to the south. The microfaunas (including one new ostracod and several new foraminifers) of the series are described.
Observations sur un massif de roches calco-magnesiennes a El Mdena Tamniert (Mauritanie)
Authors: Rocci Georges
Published: March 2020

A lime-magnesian metamorphic complex outcropping in the Amsaga series near the small butte of El Mdena Tamniert in northern Mauritania, French West Africa, consists of marbles, pyroxenites, and pyroxene or amphibole gneisses. Microscopic study shows that these rocks are the result of metamorphism of calcareous or marly sediments, mainly dolomites. Chemical analyses confirm this conclusion.
Recherche de criteres petrographiques de la notion de flysch
Authors: Rech-Frollo Marguerite
Published: March 2020

From detailed study of lithologic sequences in numerous sections in the French Alps and Pyrenees (and the Romanian Carpathians), it appears that a diagnostic petrographic criterion of the flysch facies is the appearance, in a shallow pelagic milieu, of recurrent zones of anisometric sandstones (marine sandstones with elements entirely lacking in mechanical preparation, of very dissimilar size). These zones, never developed in regular cycles, seem to be related to some factor which appeared and disappeared abruptly, interrupting the pelagic sedimentation for a time.
Observations sur le volcanisme et le glaciaire de la region des Rhues (Haute- Auvergne)
Authors: Roux Jean
Published: March 2020

The first part of the paper deals with the volcanic complex of the Limon plateau in the upper Auvergne region, France. Successive eruptions of Miocene basalts, andesites and their breccias, phonolites, and finally Pliocene basalts took place. A new volcanic center has been located in the region. The second part concerns Pleistocene glaciation in the region and its effect on drainage, particularly on the course and profile of the Dordogne.
Tectonique comparee des nappes de glissement dans le Jura bressan et diverses regions mediterraneennes
Authors: Glangeaud Louis
Published: March 2020

Compares the overthrust structure in the border zone of the Jura mountains in the Bresse region, France, with nappe structures in the Mediterranean region (nappes of the Riff and Tell regions of north Africa and of Tuscany, Italy). There are numerous similarities in style and age, but the mechanism was not exactly the same in all cases.
Determination du centile en granulometrie
Authors: Tricart Jean , Cailleux Andre
Published: March 2020

Describes a new, simple, and rapid method for granulometric analyses of sediments.
L'extremite orientale du massif de Bras et le "pli du Cannet" (Var)
Authors: Aubouin Jean
Published: March 2020

The structure of the Bras Jurassic massif, Provence, France, is the result of a pre-Sannoisian (Tertiary) double bedding-plane thrust, in which movement occurred at the base of the Muschelkalk and the Rhaetic (Triassic), in a sedimentary cover which had previously been folded in the upper Cretaceous. The Cannet range seems to be due to shearing off of a preexisting fault during this thrusting.
Dynamometamorphisme et metamorphisme regional; quelques observations dans la region brianconnaise
Authors: Perrin Rene
Published: March 2020

A study of the metamorphism of various rocks in the Briancon region, France--those of autochthonous massifs, those of the Brianconnais zone proper, and those of thrust slices of the Gondran area. The differential reaction of rock formations to metamorphism, the important role of deformation in determining the intensity of metamorphism, and the transformation of Mesozoic formations into rocks resembling ancient crystalline rocks are discussed in particular.
Contribution a l'etude du Quaternaire ancien des environs de Tenes et Cherchel (Algerie)
Authors: Gigout Marcel
Published: March 2020

Wave-cut platforms between Tenes and Tipasa in Algeria are considered evidence of two Tyrrhenian (Quaternary) transgressions. The lower level, at elevations of five to ten meters, corresponds to the Ouljian of the Atlantic coast of Morocco. This part of the Algerian coast appears to have been stable during the Quaternary except near Tipasa, where subsidence has been taking place continuously from Calabrian to recent time.
Alexandre Bigot (1863-1953)
Authors: Dangeard Louis
Published: March 2020

An account of the scientific career of the French geologist Bigot, who contributed extensively to the geology of Normandy; includes a bibliography of his publications.
Nouvelle revision des gisements a dinosauriens de la region de Saint-Chinian (Herault)
Authors: Lapparent Albert F. de
Published: March 2020

The Danian (Cretaceous) dinosaur locality at Quarante has recently yielded six dermal plates and other skeletal remains of the armored dinosaur Struthiosaurus lugdunensis. The total findings to date at this and other localities in the Saint-Chinian region, Herault, France, are summarized.
Deux regards nouveaux sur le substratum antetriasique a l'W des Vosges; les forages de Ravenel et de Damblain
Authors: Guillaume Louis. , Minoux Georges
Published: March 2020

Data from new borings for water at Ravenel and Damblain, together with those of a previous boring at Outrancourt, provide a southwest-northeast cross section of the Permo- Triassic formations of southern Lorraine, France. A dome in the granite basement is found to have controlled the distribution of the sediments, whose water-bearing properties are consequently affected.
Sur le genre Echinolampas
Authors: Roman Jean
Published: March 2020

Studies the distribution and classification of echinoids belonging to the genus Echinolampas and proposes a method of revision of the various species. Although the species are typically of limited geographic distribution, those of the Eocene E. ellipsoidalis group show striking similarities over a wide area.
Etude des plissements septentrionaux du cap Corse
Authors: Laporte Jean
Published: March 2020

Study of the development and orientation of joints in the folds, identified as recumbent, of the northwestern part of Corse cape, Corsica, France, throws light on the mechanism of folding. The pre-Tertiary movements are related to metasomatic processes.
L'importance de l'orogenese hercynienne dans les Alpes occidentales
Authors: Fabre Jean , Feys Robert , Greber Charles
Published: March 2020

Reconstructs the role of the Hercynian (late Paleozoic) orogeny in the structural development of the western Alps. The old Hercynian range exerted considerable influence during Alpine crustal movements.
Cuvillierina eocenica, nouveau genre et nouvelle espece de foraminifere de l'Ypresien d'Aquitaine
Authors: Debourle Andre
Published: March 2020

Describes the foraminifer Cuvillierina eocenica n.g. n.sp. from Ypresian (Eocene) beds of the Gan area, Aquitaine, France. It appears to constitute a guide fossil for the lower Eocene of the Mediterranean region, from Libya to Spain.
Presence du Dadoxylon (Araucarioxylon) furonii nov. sp. dans le Continental intercalaire du sud tunisien
Authors: Veillet-Bartoszewska Marie
Published: March 2020

Describes a new species of silicified wood, Dadoxylon (Araucarioxylon) furonii, from continental beds of southern Tunisia, and discusses its affinities with Mesozoic species from other African localities. The fossil is remarkably well preserved and is structurally analogous to living Araucariaceae.
Sur l'origine exogene du gite de manganese de Las Cabesses (Ariege); remarques sur les gisements pyreneens
Authors: Fournie Louis
Published: March 2020

An exogenic origin is suggested for the manganese deposit of Las Cabesses, Ariege, France, as well as for others in the Pyrenees, because of the localization of mineralization in the upper Devonian or at the Devonian- Dinantian (Carboniferous) boundary. Other proofs of the exogenic origin consist of the evidence that deposition took place before the Visean and before the hydrothermal activity associated with upper Carboniferous intrusive activity, and the constant association of the ores with a series of particular paleogeographic events. In spite of their identical origin, the deposits are diverse in aspect because of original mineralogic variations, deposition on an eroded surface, and subsequent metamorphism and hydrothermal activity.
Le plissement antenummulitique du Pelvoux
Authors: Vernet Jean
Published: March 2020

The pre-Nummulitic folding of the Pelvoux massif of France was essentially plastic and much more intense than the post-Nummulitic deformation discernible in the orientation of the upper surface of Priabonian (Eocene) strata which transgress the earlier folds discordantly.
L'importance de la tectonique "antenummulitique" dans la zone ultradauphinoise au N du Pelvoux; la chaine arvinche
Authors: Barbier Reynold
Published: March 2020

Intense orogenic activity, generally called pre-Nummulitic but actually essentially Paleocene, caused uplift of a structure, to which the name Arvinche range is given, in the northern Pelvoux massif region, France, prior to deposition of the Flysch of the Aiguilles d'Arves zone. Its characteristic sequence of thrust slices is found along the whole eastern border of the Pelvoux massif, thus establishing the north to south continuity of the Ultradauphinois zone.
Aspects geologiques du desert occidental de l'Irak
Authors: Mitchell Raoul C.
Published: March 2020

The area between the Euphrates river and the western border of Iraq consists of a rocky plain, with generally subdued relief, underlain by eastward and northeastward gently dipping formations ranging in age from Triassic in the west to Recent at the Euphrates. Local faults reflect stresses in the basement of the Syrian plateau resulting from the tendency to reestablish isostatic equilibrium.
Le genre Serridanancus, mastodontide de l'Helvetien moyen de Simorre (Gers)
Authors: Bergounioux Frederic Marie , Crouzel F.
Published: March 2020

Describes Serridanancus simorrensis n.sp. on the basis of molars from middle Helvetian (Tertiary) deposits of the Simorre region, France, ad discusses the origin and relationships of the serridentine and anancoid mastodons.
La vie vegetale continentale aux epoques pre-devoniennes vue sous l'angle de la theorie bio-rhexistasique et des dernieres decouvertes palynologiques
Authors: Erhart Henri
Published: March 2020

According to many American and European (especially Russian) paleontologists, land plants had evolved by upper Precambrian time and existed in the Cambrian and Silurian. This bears out the bio-rhexistasy theory, which holds that the presence of continental vegetation was a necessary prerequisite for the formation of certain deposits in pre-Devonian sequences, such as bauxites.
Observations sur Nummulites millecaput Boubee (forme macrospherique)
Authors: Lefebvre Simone
Published: March 2020

A statistical study of the measurements of macrospheric forms of Nummulites millecaput from Lutetian (Tertiary) deposits of the Gibret area, Landes, France. The values for the thickness of the shell, the diameter of the initial chamber, and the ratio of the diameter of the third whorl to the diameter of the initial chamber are normally distributed around the mean. The thickness of the spiral layer increases to the third whorl, then decreases. The diameter of the initial chamber correlates with the diameter rather than the thickness of the shell.
Etude de la mandibule humaine de la station mousterienne de Petit-Puymoyen (Charente)
Authors: Gabis Renee V.
Published: March 2020

The human mandible found in 1907 at Petit-Puymoyen, Charente, France, in association with a Mousterian fauna (Pleistocene) and artifacts, exhibits characteristics similar to those of Neanderthal man.
Les problemes du Miocene inferieur dans le Tell algerois [with discussion]
Authors: Mattauer Maurice
Published: March 2020

In the Tell region, Algeria, two sedimentary cycles occurred during the lower Miocene. The first ended with emplacement of the nappes of the southern Tell ranges. The post-nappe cycle is represented by Cartennian deposits. The two cycles cannot yet be distinguished on paleontologic grounds.
Presence d'un cephalopode de la famille des aulacoceratides dans l'Argovien des environs de Gornies (Herault)
Authors: Dreyfuss Maurice
Published: March 2020

A cephalopod belonging to the family Aulacoceratidae from Argovian (Jurassic) deposits near Gornies, southern France, is identified as the new species Ausseites? argoviense.
Les dyssymetries des Echinolampas fossiles (echinides exocycles cassiduloides)
Authors: Roman Jean
Published: March 2020

A certain amount of asymmetry in the arrangement and length of the ambulacral elements and the shape and outline of the test of some fossil species of Echinolampas is shown to be characteristic rather than anomalous. Two species from the Lutetian (Tertiary) of the Gironde region, France, illustrate this particularly well, E. stelliferus and E. blaviensis.
Mouvements verticaux et translations dans le couple axe ancient-sillon orogene de la Grece septentrionale
Authors: Brunn Jan H.
Published: March 2020

The orogenic evolution of northern Greece was dominated by the relative and differential movement of two contrasting, parallel and contiguous zones, the ancient Pelagonian massif and the ancient Pindus trough. Ophiolites rose along the flexure separating the two zones. The three stages of recurrent folding in the Pindus structure were preceded by uplift and accompanied by subsidence of the massif.
L'Ouljien dans le cadre du Tyrrhenien
Authors: Gigout Marcel
Published: March 2020

The Ouljian deposits of Morocco represent a transgressive pulsation which immediately preceded the last pluvial stage. Analogies with similar occurrences elsewhere in the Mediterranean and in Europe and other parts of the world are discussed. Because of certain problems relating to the nomenclature of the Tyrrhenian transgressions (in the broad sense), it is proposed that the local name Ouljian be retained, inasmuch as it corresponds to a well-defined episode in a country where the marine Quaternary is of fundamental importance.
Le Valanginien du Mont-Rose de la Madrague (massif de Marseilleveyre, Bouches-du-Rhone)
Authors: Marie Pierre , Mongin D.
Published: March 2020

A report on the stratigraphy, foraminifers (by Marie), and mollusks (by Mongin) of the Valanginian (Cretaceous) deposits of Mont-Rose de la Madrague in the Marseilleveyre massif, Bouches-du-Rhone, France. The so-called lower white limestone, formerly included in the upper Jurassic, represents beds belonging to the Infravalanginian.
Quelques remarques sur la conception actuelle du terme "cordillere" dans les Alpes internes francaises
Authors: Debelmas Jacques
Published: March 2020

The term "cordillera" is being applied more and more frequently to structures whose origin was of lesser magnitude in terms of space, time, and behavior than the original concept of an orogenically active major element of submarine relief. When field observations do not reveal the presence of embryonic "nappes," the tendency is to consider the cordillera as representing a state of orogenic activity affecting a particular area of a geosyncline, during a variable time interval, which is not perforce related, at least not directly, with the breaking off of nappes. This modern approach is applied to an analysis of the inner French Alps.
Le systeme volcanique fissural du pays Mahafaly (SW de Madagascar)
Authors: Boulanger Jacques
Published: March 2020

The Mahafaly plateau region of southwestern Madagascar is traversed by a remarkable swarm of almost 500 parallel dikes following a fracture system, of the same age, extending from the border of the Androy volcanic massif in the southeast to the Karroo formations of the Sakoa region in the northwest. The dikes range from rhyolitic to ultrabasic in composition. Their age can definitely be established as post-Karroo. Although a relationship with the Karroo dolerites of South Africa is suggested, the fissure system seems to be genetically related to the Androy volcanism, in which case the dikes would be upper Cretaceous, whereas the South African Karroo dolerites were related to Rhaetic-upper Liassic volcanism.
Marcel Thoral, 1900-1956
Authors: Gauthier Henri
Published: March 2020

A biographic account of M. Thoral, professor of geology at the university in Lyons, France, with a bibliography of his writings (75 titles).
Remarques sur les especes europeennes de rudistes appartenant au genre Plagioptychus Matheron (1842)
Authors: Mennessier Guy
Published: March 2020

Rudistid pelecypods belonging to the genus Plagioptychus from Cretaceous localities of Europe are revised, Two groups, one Turonian and the other Senonian, are differentiated by the position of the P IV tooth. The evolution of both groups is characterized by complication of the septa of the left valve and modification of the right valve from gyropleuriform to conical shape. Four new species are erected--Plagioptychus bellumensis, P. uchauxensis, P. roquebrunensis, and P. Piolencensis--and described, together with previously known forms.
Contribution a l'etude du cheminement de divers coulis d'injection
Authors: Leveque Paul
Published: March 2020

Reports the results of a study of geologic conditions at a dam site on the Oum er Rbia in central Morocco, where Autunian (Permian) permeable conglomerates and clayey sands must be grouted. The course of the water through the deposits and the desirable physicochemical and mechanical properties of the grouting material are examined in detail.
Amenagements hydroelectriques dans le sud du Bresil
Authors: Barbier Reynold
Published: March 2020

The geomorphology and hydrology of the Serra do Mar in southern Brazil offer good possibilities for hyroelectric development. The main problem is the deep alteration of the gneisses and granites which constitute most of the range. Sugar-loaf summits in the range are explained as the result of ancient (at least Tertiary) weathering plus recent uplift. Another feature of the range is the development in granitic terrain of so-called ablation tunnels, such as those which have previously been described in sedimentary terrain.
Recherche d'eau dans les vallees seches; probleme typique de Sacy (Yonne) [with discussion]
Authors: Megnien Claude
Published: March 2020

Combined geologic and geophysical (electrical resistivity) surveys in the dry valley of Sacy, Yonne, France, led to the discovery of two subsurface aquifers, one in the eluvial cover, the other in deeply weathered Rauracian (Jurassic) limestone. This type of exploration is considered suitable for ground-water investigations in the upper Jurassic plateaus of the Paris basin.
Conditions de drainage et d'assechement de quelques regions marecageuses du Jura franc-comtois
Authors: Dreyfuss Maurice
Published: March 2020

The marshes of the Drugeon valley in the Jura region, France, are peaty depressions between masses of moraine gravels. They are usually easily drained. In the case of the Champlive basin, near Baume-les-Dames, a natural underground outlet was improved. The Saone marsh, near Besancon, is a more complicated case. A tunnel to the Doubs would be effective, but costly; a wide borehole to a depth of about 80 meters through the impermeable Oxfordian (Jurassic) marls would seem to be preferable.
Observations nouvelles sur les algues et les stromatolithes du Cambrien de Carteret (Manche)
Authors: Dangeard Louis , Dore F.
Published: March 2020

Algae whose microstructures are preserved occur in Cambrian limestones of the Carteret region, France. Some, such as species belonging to Girvanella, occur in different kinds of limestones; others, including Nephelostroma lecomptei n.g. n.sp. and Epiphyton fasciculatum, have constructed stromatolitic beds. Systematic descriptions are given.
Observations sur la genese des nappes de cailloutis fluviatiles
Authors: Tricart Jean
Published: March 2020

Discusses the origin of fluvial pebble accumulations. The petrographic composition of such beds depends not only on the nature of outcrops in the drainage basin, but also on reworking of older alluvium in the valley bottom and on the introduction of material from far upstream. These factors vary considerably in relative importance along a watercourse. Different rocks wear differently in transport, so that as distance from the source increases, the proportion of more durable materials also increases.
Un serpent marin du genre Pterosphenus (Part sheppardi nov. sp.) dans l'Eocene superieur de l'Equateur (Amerique du Sud)
Authors: Hoffstetter Robert
Published: March 2020

Describes a new marine snake, Pterosphenus sheppardi from upper Eocene localities of Ecuador. This species is less specialized than contemporaneous northern forms (known only from Alabama and north Africa). It is concluded that Pterosphenus cannot have derived from specialized forms of Palaeophis, such as P. typhaeus, but from an earlier form such as P. toliapicus. Differentiation into species was divergent rather than linear.
La notion de "gite epithermal uranifere" et les problemes qu'elle pose
Authors: Geffroy Jacques , Sarcia J. A.
Published: March 2020

The uraniferous veins of Limousin, France, exhibit abnormal characteristics relative to classic hydrothermal ore veins. They occur within the granulite complex of Limousin, in fractures trending roughly perpendicular to the direction of zones of high-temperature mineralization in the contact with granite masses. Genesis of the epithermal uraniferous veins is attributed to selective concentration of lithophile elements in granites which had been subjected to pneumatolytic processes; concentration was probably partly a function of material leached by ascending solutions from subjacent shattered zones.
Geologie du secteur manganesifere du Minervois
Authors: Jaeger Jean Louis , Meunier A. , Ovtracht A.
Published: March 2020

Manganese occurs in pockets in Famennian (Devonian) limestones of the Minervois mountains on the south slope of the Montagne Noire, France. Apparently neither structure nor lithology controlled the mineralization. The morphology of the pockets and the composition of the ore suggest that the manganese deposits probably represent lacustrine sedimentation accompanying post-Famennian karst processes, during a period of emergence immediately prior to transgression of the Visean (Carboniferous) sea.
Metallogenie du gisement de La Loubatiere (Aude)
Authors: Oksengorn Simon
Published: March 2020

The lead-zinc mineralization of the La Loubatiere deposit is localized in the basal zone of a calcareous-dolomitic lens forming part of a lower Paleozoic folded and overturned schist-limestone series in the axial zone of the Montagne Noire, France. An intrusive biotite granite caused the development of intense contact metamorphism. Two stages of mineralization are recognized. One was directly related to granite intrusion; the other involved remobilization of syngenetic sulfides of shales and limestones, as a result of granite intrusion, followed by redeposition and concentration in veins of hydrothermal aspect.
Preuves en faveur d'une glaciation neo-jurassique en Patagonie
Authors: Cecioni Giovanni
Published: March 2020

Observations at various localities in Chile indicate that the so-called sericitic porphyrites of Patagonia are not metamorphosed rhyolites or rhyolitic tuffs, but glacial tillites containing striated pebbles and packets of varved clays and marine sediments that have not been subjected to dynamic action. They were deposited at the beginning of formation of the Magellanian foreland trough in the late Jurassic, and pose the problem of a Nevadian orogeny in Patagonia.
Presence du Berriasien dans la stratigraphie du plateau de Kitakami (Japon septentrional)
Authors: Sato Tadashi
Published: March 2020

Berriasian (Jurassic) ammonites are reported for the first time from Japan, from the Kitakami plateau. Four species are described and illustrated. Three are identified as unnamed species (two new) belonging to the genera Olcostephanus, Berriasella, and Kilianella; the fourth is identified as Thurmanniceras isokusensis.
Sur les buttes coquillieres de Saint-Michel-en-l'Herm (Vendee)
Authors: Ters Mireille , Verger F.
Published: March 2020

The three buttes formed essentially of oyster shells at Saint-Michel-en- l'Herm in Vendee, France, rest on Flandrian (Pleistocene) silt. They are not natural occurrences, but were built by man on a tidal flat and have been dated, at least partially, as 1066+ or -100 A.D. by means of carbon-14 analysis.
Sur les Archaeocyatha du Cambrien de Carteret (Manche)
Authors: Debrenne Francoise
Published: March 2020

Describes four species of Archaeocyatha preserved in Cambrian limestones of the Carteret area, northwest France, including Ajacicyathus carterensis n.sp. They occur in association with algae. Many arborescent colonies are present.
Le Paleozoique du Conflent
Authors: Cavet Pierre , Guitard G.
Published: March 2020

Summarizes data on the characteristic features of Paleozoic outcrops in the Conflent region visited during the eastern Pyrenees field excursion of the Societe Geologique de France in September 1958.
Le plancher du granite stratoide de Mont-Louis dans les gorges de Nyers; rapports de ce granite avec les gneiss de la Caranca
Authors: Guitard Gerard
Published: March 2020

One of the features observed during the eastern Pyrenees field excursion of the Societe Geologique de France in September 1958 was the layered granite of the Mont-Louis massif, as exposed in the Nyers gorges. The granite grades progressively from a biotite to a two-mica granite.
Le complexe paleo-volcanique de l'Albere et les roches grenues basiques et ultrabasiques qu'il renferme
Authors: Laffitte Pierre
Published: March 2020

The paleovolcanic complex of the Albere area occurs entirely within the Canaveilles series (Cambrian) and apparently has been overturned. Observations on exposures of the complex along the route between Mas Claret and the Branca col made during the eastern Pyrenees field trip of the Societe Geologique de France are reported.
Le Devonien et le Dinantien du plateau d'Ambulla
Authors: Cavet Pierre
Published: March 2020

Summarizes data on Devonian and Dinantian (Carboniferous) outcrops of the Ambulla plateau visited during the east Pyrenees field excursion of the Societe Geologique de France in September 1958.
Les migmatites profondes du Canigou dans les gorges du Cadi, a Casteil (pres de Vernet-les-Bains)
Authors: Guitard Gerard
Published: March 2020

Migmatites of deep-seated origin are exposed in the Cadi gorges which cut deeply into the south flank of the Canigou massif. Observations made in the gorge area during a visit by the eastern Pyrenees field excursion of the Societe Geologique de France in September 1958 are reported.
Sur l'existence de sediments oolithiques dans les gres dolomitiques du Trias (inferieur?) de Lorraine
Authors: Laugier Raymond
Published: March 2020

Dolomitic oolites are reported from sandstones and dolomites of the Triassic Voltzia sandstone formation (lower Triassic?) in the axial zone of the Hunsrueck anticline near Sierck, in Lorraine, France. The presence of oolitic structures formed in an environment of small-scale but intense agitation, as is evidenced by the pulverization of associated vegetable matter, suggests the new concept that the epicontinental sedimentation took place in the vicinity of a zone of active marine sedimentation.
Observations preliminaires sur la sedimentation dans les daias de la Hamada du Guir
Authors: Conrad Georges
Published: March 2020

Closed depressions similar to sinkholes are frequently developed in the Pliocene flagstone capping the Guir sandstone plateau in the Algeria-Morocco border region. In places they are filled with alternating sands and clays and two zones of alveolar calcareous crusts. In others, only one crust occurs as a result of Villafranchian (Pleistocene) erosion. Some of the depressions exhibit the characteristics of karst cavities; they were formed in areas where the sandstone was extremely calcareous.
La structure du massif volcanique de l'Androy (Madagascar)
Authors: Battistini Rene
Published: March 2020

The Androy volcanic massif of southernmost Madagascar is more complicated structurally than hitherto believed. Instead of a single basaltic unit covered by a single rhyolitic unit, several successivephases of alternating acid and basic extrusions are recognized. The volcanic complex is cradle-shaped, with dips of more than 10-20 degrees at the margins leading to the formation of cuestas.
Note sur quelques tulitides (Ammonitina) du Bathonien
Authors: Enay Raymond
Published: March 2020

Describes ammonites belonging to the family Tulitidae from Bathonian (Jurassic) localities of France. Specimens formerly attributed to Ammonites microstoma are assigned to the new genus Treptoceras, with two new species T. laurenti and T. crimaciense A complete specimen of Schwandorfia marginata is also described. The genera Sphaeroptychius, Schwandorfia, and Treptoceras are considered diagnostic of the middle and upper Bathonian.
Ebauche d'une carte hydrogeologique de la region parisienne
Authors: Abrard Rene
Published: March 2020

The documentation and methods used in compilation of a hydrogeologic map of the Paris region are reviewed. The map will comprise four sheets, showing the waters of the Campanian (Cretaceous) chalk and the Soissonnais Sparnacian (Eocene) aquifers, the Lutetian (Eocene) coarse limestone, where water circulates in a network of fissures and occurs in the basal sandy bed, the Champigny Ludian (Eocene) limestone, whose permeability is due to fissures, and the aquifer in the Fontainebleau Stampian (Tertiary) sands.
Essai de subdivision metallogenique du territoire de l'U.R.S.S
Authors: Smirnov V. I.
Published: March 2020

The distribution of ores of the Alpine, Mesozoic, Hercynian, Caledonian, and Proterozoic metallogenic epochs in the USSR is shown on a map. The overlapping of epochs within the same province proves the polycyclic character of the mineralized zones. The relations between type of mineralization and the stage of the orogenic and magmatic cycle are discussed.
Granites et synclinaux paleozoiques entre Alencon et Mayenne
Authors: Graindor Maurice Jacques
Published: March 2020

A belt of crushed granites grading into true mylonites extends between Alencon and Mayenne, France. The granites are considered Precambrian in age, inasmuch as they have not metamorphosed the Paleozoic sediments of the region. The Paleozoic sediments have been folded into synclines which were dislocated by important tangential movements during the Sudetic phase of the Hercynian orogeny (late Paleozoic). A series of sections demonstrates the structure.
Le role de la pression fluide dans les deformations tectoniques
Authors: Goguel Jean
Published: March 2020

It has been shown by K. Hubbert and W. W. Rubey that fluid pressure may play an important role in tectonic deformation when it becomes greater than that required for hydrostatic equilibrium. When the impregnating fluid in rock is under such excess pressure, the conditions of solid friction are drastically altered. The limit is reached when fluid pressure becomes equal to lithostatic pressure; rocks could then be displaced freely with respect to one another. Rough calculations show that this limit need not be reached; all overthrusts, whether due to lateral pressure or flow, can take place easily if fluid pressure is 95-98 percent of lithostatic pressure. Possible mechanisms for producing excess pressure are discussed.
Sur l'ontogenese chez les fusulinides (foraminiferes)
Authors: Rauzer-Chernousova D. M.
Published: March 2020

The ontogeny of the fusulinids is worked out, using their stratigraphic distribution as a control. Several examples, based on internal or external morphologic features, are given.
Trimorphisme morphologique et trimorphisme structural; un exemple, Choffatella decipiens Schlumberger 1905 (foraminiferes)
Authors: Sigal Jacques
Published: March 2020

An example of trimorphism is described from Aptian (Cretaceous) foraminiferal populations of France and Algeria. It involves Choffatella decipiens which is represented not only by the two known classical forms, but also by a macrospheric form. Criteria for determining that these are all forms belonging to a single species are discussed.
Observations sur l'ontogenese de certains brachiopodes fossiles
Authors: Biernat Gertruda
Published: March 2020

Concrete examples of ontogeny in certain brachiopods are given, based on the order of appearance and degree of development of different internal and external morphologic elements of the valve. Their significance in terms of the family, genus, species, and subspecies, as well as their phylogenetic relationships are discussed.
Protoblattiniella minutissima Meun., forme larvaire du type blattinopside (insectes protorthopteres)
Authors: Laurentiaux Daniel
Published: March 2020

Protoblattiniella minutissima is redescribed, giving details of its anatomy and its affinities with the protorthopteran family Blattinopsidae. It is concluded that Protoblattiniella represents a very young larval form of Blattinopsis, a common insect in the upper Stephanian (Carboniferous) of Commentry (Allier, France).
Geologie de la region de Bar-le-Duc (Meuse)
Authors: Stchepinsky Vladimir
Published: March 2020

Upper Jurassic (Kimeridgian and Portlandian) and lower Cretaceous formations crop out in the area south of Bar-le-Duc, France. In contrast to the fractured area to the west, this area is a solid block. The relatively unimportant Veel-Combles fault is related to the Marne double fault, despite its isolation. An east-west fault, 20 kilometers long with a southward throw of 10 meters, can also be traced. The paleogeographic evolution of the area during the Mesozoic is outlined.
Une nouvelle serie polymetamorphique du Massif Central francais; le Livradois meridional
Authors: Forestier Francois-Hubert
Published: March 2020

A retrograde metamorphic series in the southern Livradois zone is described and compared with other retrograde metamorphic zones in the crystalline rocks of the Central Massif of France. The second metamorphism is not merely a late stage of the first; its microcataclastic character indicates that it affected completely consolidated rocks of the deep migmatite to the lower mica schist stage. Two distinct pre-Stephanian orogenies are apparently represented, but they cannot be dated more precisely at present.
Note preliminaire sur le Cretace a rudistes de l'Anti-Alborz (Elbourz) occidental (E et SE de Teheran, Iran)
Authors: Nazemi Fakhriran , Grubic A.
Published: March 2020

Rudistid-bearing Cretaceous beds have been studied in the western Anti-Elburz region east and southeast of Teheran, Iran. Hippurites vredenburgi and Osculigera magna are described in detail. Biradiolites carezi and B. cf. siracensis were also identified. It is now possible to correlate the rudistid facies throughout all of Iran.
Remarques sur le Pliocene de Lessay (Manche)
Authors: Pelhate Annik
Published: March 2020

Two types of deposits, both Pliocene, are recognized on the basis of sedimentologic analyses of samples collected near Lessay (Manche, France). One represents a transgressive facies (characterized by the presence of glauconite and abundant metamorphic minerals), the other a regressive facies (characterized by the presence of amphiboles).
La faune silurienne de Phulchauki pres de Kathmandu (Himalaya du Nepal)
Authors: Bordet Pierre , Cavet P. , Pillet J.
Published: March 2020

Describes an upper Silurian fauna from the Phulchauki massif near Katmandu in the Himalaya range, Nepal. Systematic descriptions of brachiopods from graywacke schists and trilobites from a hematite bed are included.
Les affleurements senoniens de la tranchee du gaz de Lacq en Charente
Authors: Seronie-Vivien Micheline
Published: March 2020

Several horizons, well defined on the basis of their micrographic and micropaleontologic characteristics, are recognized in the Senonian (Cretaceous) sediments traversed by excavations for the gas line northward from the Lacq field in Charente toward the center of France. Precise stratigraphic definition of the zones was possible with the aid of associated ammonites and species of Inoceramus.
Donnees nouvelles sur le Jurassique et le Cretace inferieur dans l'est des Cordilleres betiques (regions d'Alcoy et d'Alicante)
Authors: Busnardo Robert , Durand Delga M.
Published: March 2020

Although only about 40 kilometers apart, the Jurassic-lower Cretaceous deposits of the Querola section in the northern Alcoy area differ considerably from those of the Sierra de Foncalent section in Alicante, Spain. The details of the sections are reported. The Alcoy section may belong to the Prebetic zone; the Alicante section may belong to the Subbetic or to a paleogeographic unit intermediate between the two structural zones.
Une coupe du Tertiaire prebetique de Benitachell (prov. d'Alicante, Espagne)
Authors: Durand Delga Michel , Magne J.
Published: March 2020

The Tertiary section above the neritic Cretaceous limestones forming the base of the Benitachell range, Spain, comprises massive middle upper Eocene limestones, with a thin basal conglomerate, and a thick series of apparently conformable upper Oligocene limestones and marls. The predominance of limestones and the presence of stratigraphic gaps distinguishes the section from the Nummulitic section of the Alfaz region, some 307 kilometers to the southwest, which is essentially marly from Senonian (Cretaceous) to Oligocene. A major tectonic break may intervene between the two areas.
Les "konglomeratische Mergel" des Cordilleres betiques
Authors: Duplaix Solange , Fallot P.
Published: March 2020

The so-called "konglomeratische Mergel" (conglomeratic marl) formation of the Betic cordilleras, Spain, is neither a marl nor a conglomerate. A residual origin is suggested, involving solution of the soluble part of older rocks. Study of heavy minerals shows that the source rocks cannot have been the mica schists of the Sierra Nevada or the Mischungszone (zone of tectonic mixing); they were derived from crystalline rock masses which were emergent in the lower Triassic.
Etude de quelques affleurements jurassiques de la region d'Alcala de los Gazules (prov. de Cadix, Espagne)
Authors: Chauve Pierre
Published: March 2020

Jurassic outcrops in the Subbetic zone of the Alcala de los Gazules region, northern Cadiz, Spain, are nearly always in unconformable contact with Triassic formations and are often extensively dislocated. A complete sequence from Liassic to Cretaceous has been established, nevertheless.
Sur un magmatisme jeune dans les Dinarides externes de Yougoslavie
Authors: Ciric Branislav
Published: March 2020

Reports and describes occurrences of rhyolite in the top of the upper Cretaceous Flysch deposits of the Durmitor region in Montenegro, Yugoslavia. The field evidence suggests that the rhyolites and their tuffs are contemporaneous with the Flysch, and are Maestrichtian-Danian in age.
Le Carbonifere post-tassilien du bassin de Reggan (Sahara occidental)
Authors: Bonnet Andre , Fabre J. , Feys R.
Published: March 2020

Drilling for oil in the Reggan region (Algeria) of the western Sahara shows the presence of a Carboniferous basin, in which two continental series--Namurian and Stephanian--can be distinguished. The Westphalian is essentially absent. Some fossils (fish scales, Leaia, and Cordaites) that are new for the region are described.
Les spores de l'assise de Bruay dans l'ouest du bassin houiller du Nord et du Pas-de-Calais
Authors: Carette Josiane , Cayeux Jacqueline , Danze Jacques , Laveine Jean-Pierre , Le Merrer Annie
Published: March 2020

Study of the distribution of mega- and microspores in coal seams of the Bruay zone in the western part of the Nord-Pas-de-Calais basin, France, permits vein-to-vein correlation over distances of more than 10 kilometers, confirming the value of palynology in coal stratigraphy.
Stratigraphie du bassin houiller de Lons-le-Saunier (Jura); note preliminaire
Authors: Greber Charles , Lienhardt G.
Published: March 2020

Paleobotanic evidence confirms the presence of a lower and a middle Stephanian zone in the Carboniferous coal measures of the Lons-le-Saunier coal basin (Jura, France).
Un arthropode du terrain houiller de la Loire, Eileticus pruvosti nov. sp.; position systematique du genre Eileticus Scudder
Authors: Vandenberghe Andre
Published: March 2020

Describes Eileticus pruvosti n.sp., a new arthropod from the Carboniferous coal measures of the Loire region, France. It was found in the Saint-Etienne basin, in boundary beds between the middle and upper Stephanian. Its morphologic features confirm the fact that the genus belongs to the order Syncarida.
Les formations ferrugineuses de l'Hauterivien de Bargeme (Var)
Authors: Cotillon Pierre
Published: March 2020

Detailed study of ferruginous Hauterivian (Cretaceous) deposits of the Bargeme region, France, shows that there is a close relation between glauconite, glauconite altered by iron hydroxide, and ferruginous oolites. Iron of continental origin is a genetic factor common to all three. Reacting in an alternately reducing and oxidizing environment, the iron was responsible for formation of glauconite by combination with clay minerals, and of iron hydroxide. The glauconite is thus a true ore mineral comparable to the chlorites of the Lorraine basin.