bluuebunny/crossref_metadata_2025 huggingface dataset:
Limites dimensionnelles et noms des fractions granulometriques
Authors: Cailleux Andre
Published: June 2020

Statistical study of all proposed granulometric classification systems shows that the one which stands the best chance of being adopted universally is Atterberg's, which places the limits of the various grain-size groups at 200, 20, 2, 0.2, 0.02, and 0.002 mm.
Les phases du metamorphisme en Rouergue
Authors: Collomb Pierre
Published: June 2020

Two distinct phases of general metamorphism are recognized in the crystalline rocks of the Rouergue region, France. Ectinites and migmatites were produced during the earlier phase. The later phase was essentially one of retrograde metamorphism. Tectonic stages associated with the metamorphic phases are represented by axial trends of N. 75 degrees W. and N. 15 degrees W. respectively.
Etude de la partie occidentale du massif de l'Aston, Ariege
Authors: Destombes Jean Paul , Raguin Eugene
Published: June 2020

The migmatites of the eastern part of the Aston massif, in the axial zone of the Pyrenees in Ariege, France, are metamorphosed lateral equivalents of the Paleozoic formations of the Vicdessos area, from which they are separated by an anticline.
Etude des orthophragmines contenues dans les marnes a Xanthopsis dufourii (Lutetien inf.) de la chalosse de Montfort (Landes)
Authors: Neumann Madeleine
Published: June 2020

Describes an orthophragmine foraminiferal fauna (including Discocyclina trabayensis n.sp.) from lower Lutetian (Tertiary) Xanthopsis durourii-bearing marls which outcrop on the southern flank of the Audignon ridge and, farther west, on the flanks of the Louer dome, Aquitaine, France.
Decouverte de niveaux a charophytes dans le Cretace inf. du Dj. Meimel (Constantine, Algerie); etude de la serie stratigraphique
Authors: Baer Christian , Magne Jean
Published: June 2020

In a detailed study of the Cretaceous series of the Djebel Meimel massif, Constantine, Algeria, charophytes were found in strata attributable to the basal Aptian. Beds containing Atopochara trivolvis, a species not previously noted in north Africa, seem to constitute a good horizon marker.
Vraconien et Cenomanien neritiques entre Var et Siagne (Alpes-Maritimes)
Authors: Parent Henri
Published: June 2020

Describes Vraconian and Cenomanian (Cretaceous) beds, characterized by a neritic facies, which outcrop in the Var-Siagne region, France. The same shallow-water fauna, particularly small forms of the pelecypod Exogyra, is represented in this facies, which has previously been encountered in Cenomanian deposits of other localities in Alpes-Maritimes.
Victoriella aquitanica, nouveau foraminifere de l'Oligocene d'Aquitaine
Authors: Debourle Andre , Delmas Marc
Published: June 2020

Describes a new Oligocene foraminifer, Victoriella aquitanica, from a well cutting near Mimizan, Aquitaine, France.
Sur la structure d'une partie de l'Atlas tellien septentrional
Authors: Caire Andre , Chauve Pierre , Glangeaud Louis , Mattauer Maurice
Published: June 2020

Discusses the extent of occurrence of horizontally displaced sedimentary masses in the northern Atlas range in the Tell region, Algeria, and ascribes the mechanism of emplacement of these allochthonous lenses to successive flows on flexure fronts.
Nouvelles especes de charophytes dans les niveaux de la limite jurassico-cretacee du Jura, des Alpes-Maritimes et de la Provence
Authors: Donze Pierre
Published: June 2020

Describes three new species of charophytes from Jurassic-Cretaceous boundary beds in the Jura, Alpes-Maritimes, and Provence regions, France--Clavator thorali, C. fieri, and Aclistochara maxima.
Relation entre la granulometrie et le poids des grains de quartz entre 0,063 et 23 mm
Authors: Berthois Leopold , Berthois C.
Published: June 2020

The weight of quartz grains between 60mu and 23 mm in size is shown to vary linearly with diameter.
Un probleme stratigraphique de la Patagonie; la serie porphyrique
Authors: Cecioni Giovanni
Published: June 2020

The Bahia Laura, Ibanez, Seno Rodriguez, and Flamenco formations of Patagonia form a single stratigraphic unit. The basal beds of the Seno Rodriguez and Flamenco formations may be derived from rhyo-lites, but the upper, and greater, part consists of consolidated glacial and fluvioglacial deposits, considered upper Jurassic in age. The name "porphyry series" is thus inapt and should be dropped.
Etude des phenomenes metasomatiques dans les amphibolites des monts du Lyonnais
Authors: Peterlongo Jean
Published: June 2020

A detailed study (with chemical analyses) of migmatitic amphibolites in the Lyonnais mountains and comparison with similar rocks from the Central Massif, France. Notwithstanding their different aspect, the nature of chemical exchanges during metasomatic processes and the mechanism of their formation are analogous to those of gneiss.
Etude geologique de l'ile de Bozcaada
Authors: Erguvanli Kemal
Published: June 2020

A brief description of the geology of Bozcaada island (Turkey) in the Aegean sea. Crystalline schists and marbles and Tertiary sedimentary and volcanic rocks are represented.
Quelques observations petrographiques sur un recif du Sequanien d'Angoulins (Charente-Maritime)
Authors: Lafuste Jean
Published: June 2020

A petrographic study of a Sequanian (Jurassic) coral reef deposit exposed in the cliff at Angoulins near La Rochelle, France. Formation of the reef probably took place on a shallow platform, and was accompanied by deposition of abundant terrigenous material under conditions of extremely variable currents.
Quelques remarques sur les littoraux actuels pour la comprehension des littoraux fossiles
Authors: Bourcart Jacques
Published: June 2020

Observations of present shore features are an aid in interpretation of Quaternary beaches. In the cliffs of the estuaries on the coast of Brittany, France, a sharp break in slope corresponds to the boundary between dry and wet zones, variable according to exposure. Criteria for distinguishing beaches of continental origin from those of marine origin are discussed.
Remarques sur les depots de travertins par les cours d'eau et sur leurs consequences morphologiques [with discussion]
Authors: Lambert Alexis
Published: June 2020

Discusses the conditions governing localization of travertine dams along streams in the karst region of Yugoslavia. Deposition occurs when the flow passes from the so-called tranquil to the turbulent regime, and can be attributed to a cavitation effect. These dams seriously interfere with normal erosion. In Algeria and Morocco such deposits have had an effect on the sculpturing of land forms; vast areas should be studied in detail in the light of this phenomenon.
Le chainon jurassique de Berchich (Ighil Ali); retouches au schema paleogeographique et structural de l'Algerie tellienne
Authors: Lucas Gabriel
Published: June 2020

The Jurassic series exposed in the Berchich range near Ighil Ali, Algeria, is distinguished by the presence of Aalenian-Bajocian red sandstones and pelites. The only other such rocks known in Algeria are in the Ouarsenis and Numidian ranges. The Ouarsenis- Ighil Ali-Numidian range zone is considered to be a single structural unit, a fact which casts doubt on the validity of the so-called zone I (Kabylia zone) structural unit.
Observations sur les ilots rocheux situes au nord de Granville (Manche)
Authors: Graindor Maurice J. , Roblot M. M.
Published: June 2020

The rocky islets north of Granville along the west coast of the Contentin peninsula, France, are not Brioverian in age. Two stratigraphic complexes are present; the first, at Ronquet and the Moulieres d'Agon, represents the westward extension of the Montmartin Carboniferous geosyncline, and the second, from Senequet to the mouth of the Ay, is of the same age as the Lessay sandstone, probably Carboniferous. Diorite was found at the Chaussee des Boeufs.
Sur la constitution geologique de la region du Vohibory (Madagascar)
Authors: Boulanger Jacques
Published: June 2020

In the Vohibory region, southern Madagascar, the peneplaned crystalline basement outcrops on the east, the sedimentary cover on the west. The basement is composed of Precambrian paragneissic rocks, in which a basal amphibolitic complex (the Androyen series in the east and the Vohiboryen series in the west) can be distinguished, and the unconformably overlying Ampanihyen series. Petrographic study shows distinct petrochemical differences between the series, confirming the stratigraphic and structural evidence of the unconformity.
Discocyclina senegalensis nov. sp. du Lutetien du Senegal
Authors: Abrard Rene
Published: June 2020

Describes the foraminifer Discocyclina senegalensis n.sp. from Lutetian (Tertiary) deposits of Senegal, French West Africa.
La geologie de l'extreme sud-est de Madagascar
Authors: Roche Hubert de la
Published: June 2020

Recent work in the extreme southeastern part of Madagascar suggests that the Androyen system be subdivided on the basis of stratigraphic rather than metamorphic zones. The Anosyen granites and their train of charnockites were developed at variable levels within the upper pyroxenite series which is distinctly layered. These upper series contain thorium deposits (thorianite in the phroxenites, monazite in the granites); the Anosyen granitization and thorium concentration are related to the Eocambrian orogeny 485 million years ago.
Les problemes geologiques et miniers dans l'exploitation du mica phlogopite a Madagascar
Authors: Brenon Pierre
Published: June 2020

The phlogopite-bearing pyroxenites of Madagascar occur as interstratified lenses, transverse veins, and rare vertical columns in crystalline schists of the basement complex. They belong to the most highly metamorphic facies (the so-called granulite facies). The mica is concentrated along structural lines in the schists or, as in the case of the transverse veins, along an ancient fracture pattern. The latter are generally more important from an economic viewpoint. Exploration and exploitation of the mica would benefit greatly from an understanding of the different types of mineralization. If the parametamorphic nature of the diopside pyroxenites of southern Madagascar is proved, a new theory of mica mineralization must be formulated.
Formations quaternaires du havre de Blainville (Manche)
Authors: Durand Suzanne , Pelhate A.
Published: June 2020

Analysis of the heavy mineral and granulometric composition of the shore and harbor sands of the Blainville area, France, shows that an early Quaternary marine phase was followed by a period of emergence, then the Monastirian transgression, regression, the Flandrian transgression, and finally by the formation of the present dunes.
Maurice Gignoux (1881-1955)
Authors: Moret Leon
Published: June 2020

A biographic account of the French geologist Gignoux and a bibliographic list (230 titles) of his writings.
Geochimie classique et transformiste
Authors: Nieuwenkamp Willem
Published: June 2020

Reviews the geochemical balance of elements according to the classic and transformist viewpoints, and discusses the behavior of mobile and refractory elements during cycles of formation of igneous and sedimentary rocks.
Le volcan sous-marin d'age acadien de Sidi-Said-Maachou (Maroc occidental)
Authors: Gigout Marcel
Published: June 2020

At three localities in the Sidi-Saied-Maachou area, a complex of volcanic rocks has been identified in the thick, otherwise uniform series of Acadian (Cambrian) green schists of the plateau region of Morocco, which is considered to represent a submarine volcano. Purplish schists, layers of organic limestone, and pyroclastic material, laid down in deep water, are cut by vertical dikes which fed sills and submarine flows of basic lava. The eruption was calm, resembling, on a much smaller scale, the emplacement of greenstones in geosynclines.
La terminaison meridionale des nappes sud-telliennes dans la region de Tiaret (Algerie)
Authors: Polveche Jean
Published: June 2020

In the Tiaret region, Algeria, a nappe of Oligo-Miocene material was emplaced during lower Miocene time, and both overlies and is overlain by lower Miocene beds. Thus three series of lower Miocene beds can be distinguished, solely on the basis of structure--autochthonous, slightly folded strata, transgressive on thebasement; the nappe itself, highly deformed; and subhorizontal beds, deposited after nappe emplacement. The zone of Miocene thrust slices, formerly considered subautochthonous, is therefore allochthonous. Displacement was over 23 kilometers.
Les nappes sud-telliennes entre Letourneux et Bordj-bou-Arreridj
Authors: Kieken Maurice
Published: June 2020

Geologic mapping shows that the region between Letourneux and Bordj-bou-Arreridj, Algeria, is underlain by several superposed nappes emplaced as a result of gravitational sliding. Eight units are distinguished, corresponding to displaced masses composed of material characterized by a progressively deeper facies. The nappes, derived from the north, were emplaced during the lower Miocene.
Observations structurales sur les Pyrenees occidentales
Authors: Viers Georges
Published: June 2020

The Igounce massif in the western French Pyrenees is not a Paleozoic massif but an accumulation of detrital material which was deposited in a Cretaceous (Cenomanian) trough. The so-called overthrust structure in the peak of the Lakhoura massif is a perched syncline of Senonian (Cretaceous) strata.
Algues calcaires codiacees fossiles d'Iraq, nouvelles et peu connues
Authors: Elliott Graham F.
Published: June 2020

Describes the following new or little known fossil codiaceans (algae) from Iraq--Cayeuxia piae, C. kurdistanensis n.sp., and Lithocodium aggregatum, from the Cretaceous, and Halimeda praemonilis, H. nana, and Ovulites morelleti from the Paleocene.
Sur des restes d'Hipparion sitifense Pomel, des calcaires lacustres de Mascara (Oran)
Authors: Arambourg Camille
Published: June 2020

Describes teeth of Hipparion sitifense from uppermost Pliocene lacustrine limestones of the Mascara region, Algeria. Three forms of tridactyl equines are now definitely known from north Africa, with H. sitifense representing an intermediate species. The Mascara find reveals for the first time the characteristics of the entire upper dentition.
Notes paleoichthyologiques
Authors: Guffroy Simone
Published: June 2020

A comparative study of the anatomy of an actinopterygian fish (Birgeria sp.) from southern Madagascar and specimens from other Triassic localities revealed no anatomical differences which would justify subdivision of Birgeria into two groups on the basis of size. A comparative study of the semionotid fish Semionotus capensis from the upper part of the Stormberg series of the Karroo system in southwestern Basutoland was also made.
Role morphologique de depots de travertins par des sources laterales aux cours d'eau dans le Tell algerien
Authors: Lambert Alexis
Published: June 2020

Gives several examples from the Tell region, Algeria, where travertine deposited by springs along the sides of streams has noticeably affected valley development. Although apparently insignificant at any given moment, the masses of material involved may be considerable in the course of time. The obstacle to erosion imposed by hard travertines may be the equivalent of a mountain range.
Poudingue de Gourin et poudingue de Montfort sur le pourtour de la region silurienne au sud de Rennes [with discussion]
Authors: Klein Claude
Published: June 2020

Observations in marginal zones of Silurian synclinal basins in the southern Rennes region, France, show that the Gourin conglomerate is not a Brioverian (Precambrian or Infracambrian) intraformational conglomerate, but is equivalent to the Montfort conglomerate discordantly overlying the Brioverian, and that both conglomerates are basal Ordovician.
Sur un Problematicum du Lias inferieur de la Haute-Marne, Siphonites heberti de Sap
Authors: Gardet Gustave , Laugier R. , Lessertisseur J.
Published: June 2020

Study of material from the lower Liassic of Haute-Marne, France, indicates that Siphonites heberti, previously considered an alga, probably represents traces of annelid worms that lived in tubes with cemented walls.
L'ordre de succession des phenomenes orogeniques et ses consequences
Authors: Gidon Paul
Published: June 2020

In several parts of the Alps it can be established that uplift preceded folding. This is also the case in parts of the Pyrenees and perhaps of the Andes. If this is true of whole mountain systems, compression is ruled out as a primary cause of folding. The geotectonic consequences of this reasoning, which in general support the hypothesis of gravitational sliding, are explored.
Sur l'existence d'un important systeme de fractures interessant le Continental intercalaire a l'W de l'Air (Niger, A.O.F.)
Authors: Joulia Francois
Published: June 2020

West of the Aier massif, French West Africa, a vast system of faults involves all formations up to and including the lower Cretaceous Continental intercalaire. The fractures were probably produced as a result of warping of the basement rather than folding. In view of the fact that Hercynian (late Paleozoic) folding was very weak, many of the faults observed in Devonian sandstones and in the Precambrian are probably products of post-Cretaceous deformation rather than Hercynian folding. The springs at Teguida are directly related to the faults, and copper and barite mineralization also seems to be related.
Geologie des Minquiers; premieres observations
Authors: Graindor Maurice J. , Roblot M. M.
Published: June 2020

Four rock complexes are distinguished in the Minquiers plateau, a partially emerged submarine plateau off the coast of France, north of Saint-Malo. From northwest to southeast, they are diorite, banded migmatitic rocks, granites, and gneisses. The gneisses and migmatites are the two oldest complexes; the granite is the youngest.
Presence de Microcodium dans la region de Limoux (Aude)
Authors: Boulanger Dominique , Cros P.
Published: June 2020

Structures found in Montian (lowermost Tertiary) limestone and marls of the Limoux region, France, are identified as belonging to Microcodium. The characteristic features of the isolated structures argue in favor of their organic origin.
La sedimentation argileuse a attapulgite et montmorillonite
Authors: Millot Georges , Radier H. , Bonifas M.
Published: June 2020

Formation of attapulgite is related to calcareous and siliceous chemical deposits. In a marine environment, deposition of phosphates intervenes. The attapulgite is authigenic in origin, as is also the montmorillonite in chalks. The elements necessary for sedimentation characterized by abundant Si, Ca, and Mg are derived from differential leaching of material in continental areas which are being subjected to laterization. Such a history can be reconstructed for the Gao basin in the Sudan, French West Africa.
Observations preliminaires sur le gisement d'etain d'Abbaretz (Loire-Atlantique)
Authors: Chauris Louis , Pare B.
Published: June 2020

The tin-bearing quartz veins of the Abbaretz area, Loire region, France, occur in Ordovician schists which were subjected to granulite intrusion accompanied by contact metamorphism, intense deformation, during which a fault system striking parallel to the regional tectonic trend was produced, tourmalinization by pneumatolytic material introduced into fissures, and mineralization involving deposition of quartz, beryl, cassiterite, arsenopyrite, pyrite, chalcopyrite, molybdenite, and rutile (more or less in that order) during repeated movement on the faults and subsequent transverse faulting.
Contribution a l'etude de la microfaune des marnes plaisanciennes des Alpes-Maritimes
Authors: Marie Pierre , Perriaux J.
Published: June 2020

Identifies and lists the microfauna (principally foraminifers) found in the Plaisancian (Pliocene) blue and yellow marls at Vaugrenier, Abadie, and Saint-Martin-du-Var, Alpes- Maritimes, France.
Sur l'appauvrissement des eaux souterraines de l'Ile-de-France et en particulier de la nappe dite "du Soissonnais"
Authors: Castany Gilbert , Laffitte P. , Soyer R.
Published: June 2020

The water resources in the Champigny and Bartonian (Eocene) limestones, and particularly those of the "Soissonnais" aquifer in Cuisian sands, of the Ile-de-France area in the Paris basin, France, are being exhausted. Several remedies are suggested to conserve the quality, as well as the quantity, of water.
Hydrogeologie des formations volcaniques de l'Auvergne
Authors: Michel Robert
Published: June 2020

Ground-water distribution in the volcanic massifs of the Auvergne region, France, depends on the relationships of the various volcanic rock types (lavas, breccias, tuffs, pozzolan, ash). Variations in hydrogeologic conditions are described in terms of these relationships. The quantity of potable water exceeds local demand, so that some can be supplied not only to nearby urban areas but also to more distant places such as Limagnes.
Sur les alluvions quaternaires du Clain
Authors: Patte Etienne
Published: June 2020

Several Quaternary levels, in different states of preservation, are found in the Clain valley, France. The lower terrace gravels contain reindeer and Equus (Asinus) hydruntinus remains; these are overlain by a clay containing Mousterian artifacts, contemporaneous with Pleistocene loess. The 25-meter terrace of Saint-Georges-les-Baillargeaux corresponds to an abandoned channel; it contains remains of Elephas trogontherii and is overlain in places by a true loess. Solifluction has been important and occurred during several different phases.
Contribution a l'etude de quelques Asteropyginae (trilobites)
Authors: Pillet Jean
Published: June 2020

Type species for the trilobite genus Pseudocryphaeus and the subgenus Asteropyge (Metacanthina), proposed and briefly described in 1953, are here described in detail, as well as several related forms, including the new subspecies A. (M.) oehlerti praecursor and P. michelini barroisi.
Sur la nervation de quelques feuilles de Cordaites
Authors: Ledran Christiane
Published: June 2020

Study of the venation of Cordaites leaves, by means of photographic enlargements, indicates that the characteristics of the venation can serve as a criterion for identification, even of fragmentaryleaves, and suggests that such fossil leaves, extremely abundant in continental Carboniferous deposits, can be used for stratigraphic purposes.
Observations petrographiques sur les meulieres pliocenes
Authors: Alimen Henriette
Published: June 2020

Millstone capping the Pliocene sequence of the Beni-Abbes region, Algeria, exhibits a genetic relationship with underlying sandstone. Numerous grains of detrital quartz clearly show the effects of solution which could have been the source of the secondary silica (chalcedony and quartz). Induration was a near-surface process. Iron oxides, gypsum, and perhaps calcium carbonate appear to have played a role in the processes of substitution and induration.
Variation du niveau des nappes aquiferes du nord de la France
Authors: Leroux Edmond , Ricour J. , Waterlot G.
Published: June 2020

Northern France, with less annual rainfall than most other parts of the country and no large rivers, has extensive and increasing water-supply requirements because of the dense population and a rapidly expanding industry. The piezometric level of the Carboniferous limestone aquifer dropped 35 meters between 1917 and 1957, 15 meters of this between 1952 and 1956. Water tables in Cretaceous chalk and in Tertiary sands also have varied strongly. Serious water shortages are foreseen if there should be a succession of dry years.
Etude sur quelques phosphates egyptiens; teneur en phosphate et radioactivite
Authors: Hussein Hussein Abdel-Mohsen
Published: June 2020

Study of samples from the Cretaceous phosphate deposits of Kosseir and Sebaiya, Egypt, shows a relationship between the phosphate content and grain size and between the phosphate content and the uranium content.
Le Stampien inferieur fossilifere des environs de Marines (Seine-et-Oise)
Authors: Cavelier Claude , Feugueur L.
Published: June 2020

Describes the fauna of basal Stampian (Oligocene) deposits in the vicinity of Marines (Seine-et-Oise, France). The fauna has not been reported since 1865.
Contribution a l'etude paleogeographique de la periode permienne dans la Provence cristalline
Authors: Bouillet Genevieve , Lutaud L.
Published: June 2020

Following a review of knowledge of the Permian depression bordering the Maures massif between Toulon and the vicinity of Cannes, France, the preliminary results of a paleogeographic and paleoclimatic study of the Permian period in Provence are presented, based on morphoscopic analysis of the Permian sediments of the region.
Vue d'ensemble sur le bassin sedimentaire cotier du Dahomey-Togo
Authors: Slansky Maurice
Published: June 2020

The sedimentary series of the coastal basin of Dahomey-Togo (west Africa) is known to have a thickness of about 700 meters. Overlying a Precambrian basement, it consists of a thick marine sequence from upper Cretaceous to middle Eocene, cut by faults. Several key horizons are established on the basis of microfaunas and argillaceous sedimentation. Comparisons can be made with other African basins on the basis of the paleontologic and sedimentologic criteria.
Sur un cas de commensalisme d'une annelide et d'un Clypeaster miocenes
Authors: Saint-Seine Roseline de
Published: June 2020

Shells of Clypeaster species from the Helvetian (Miocene) of Syria are perforated by a commensal annelid, described as Lumbriconereis? clypeastricola n.sp.
Les coupes du Guil et de l'Ubaye au travers de la zone brianconnaise (Hautes-et Basses-Alpes); essai de correlation tectonique [with discussion]
Authors: Debelmas Jacques , Gidon M.
Published: June 2020

Transverse sections across the Brianconnais zone are exposed in the Guil and Ubaye valleys in the French Alps. Both show superimposed nappes on the west, and thrust slices dipping toward Italy on the east. The origin of the latter is still unknown; they may possibly be due to deep-seated flow. Evidence of late- stage reverse thrusting is present in the Ubaye section, but is absent in the Guil section.
Evolution morphotectonique du Jura externe dans la demi-fenetre d'Aiglepierre
Authors: Caire Andre
Published: June 2020

In the Aiglepierre half-window in the outer Jura mountains, France, Triassic deposits of the Salins and Mont-Poupet groups rest on a substratum of upper Jurassic and Tertiary deposits. This substratum shows two erosion surfaces, distinct from the post-nappe surface which truncates the thrust slices of the overthrust area. With these surfaces and the Tertiary deposits as horizon markers, it is possible to trace a wave of Oligo-Miocene uplift which was propagated eastward toward the interior of the Juras.
Apercus et reflexions sur les schistes cristallins et les granites de la zone axiale pyreneenne entre l'Ariege et la Mediterranee
Authors: Guitard Gerard
Published: June 2020

New details are given on the structure of the Canigou-Caranca massif in the axial zone of the eastern part of the French Pyrenees. Crystalline schists, formed during general metamorphism and characterized by the extensive development of augen gneisses, and migmatites, granite gneisses, and granites, formed subsequently in an episode of regional granitization, are distinguished.
La base de la serie sedimentaire d'Amelie-les-Bains (Pyrenees-Orientales)
Authors: Guitard Gerard , Ricour J.
Published: June 2020

Describes a section in the Amelieles-Bains area in the eastern French Pyrenees that shows an almost continuous Mesozoic sequence. Two gypsiferous levels are present in the Triassic; the younger, considered Keuper, separates the dolomitic Muschelkalk from calcareous-dolomitic beds attributed to the Jurassic.
L'apport des travaux de la Compagnie d'exploration petroliere (C.E.P.) dans la connaissance du bassin tertiaire du Roussillon
Authors: Gottis Maurice
Published: June 2020

Summarizes the results of gravity, seismic, and aeromagnetic surveys and the sections traversed by two borings in the Roussillon Tertiary basin of the eastern Pyrenees.
Le Cretace superieur et l'Eocene des lambeaux charries de Coustouges
Authors: Casteras Marcel
Published: June 2020

Summarizes data on the tectonic position of upper Cretaceous and Eocene deposits of overthrust masses in the Coustouges basin, with particular reference to observations made during the east Pyrenees field trip of the Societe Geologique de France in September 1958.
De Perthus a Darnius; de Darnius a Figueras; de Figueras a Gerone
Authors: Fontbote Jose Maria , Virgili C.
Published: June 2020

Summarizes the geology observed along the route between Perthus and Gerona, Spain, of the eastern Pyrenees field excursion of the Societe Geologique de France in September 1958.
Quaternaire et Pliocene du Gurp (Gironde)
Authors: Paquereau Marie Madeleine , Schoeller M.
Published: June 2020

The stratigraphy of the Gurp region in Gironde, France, is reviewed in the light of new well data. Thick alluvial deposits underlie the Gurp clay. Pollen analysis indicates that the bed containing Elephas meridionalis is early Pleistocene and that the Gurp clay and older alluvium are Pliocene.
Remarques sur le Quaternaire marin de la cote orientale de la Tunisie
Authors: Jauzein Andre
Published: June 2020

In the Gabes gulf, Tunisia, only two beaches are visible that postdate the Pliocene transgression, both of which belong to the Tyrrhenian (Pleistocene) cycle.
Observations sur le "Primaire" du Tagant (Mauritanie)
Authors: Delpy Jacques
Published: June 2020

A concordant series of formations outcropping in the Tagant plateau of Mauritania (west Africa) is provisionally referred to the Paleozoic because the upper formations can be dated as Gotlandian (Silurian)-Devonian. The structure of the plateau is typically "Tassilian"--gently dipping monoclinal beds truncated by cuestas. In the western part, however, there are both stratigraphic and tectonic anomalies (hiatuses and tight transverse folds).
Le Lias et le Jurassique moyen de la region de Kandreho (Madagascar)
Authors: Collignon Maurice , Rebilly G. , Roch E
Published: June 2020

Describes the Liassic and middle Jurassic stratigraphy of the Kandreho region and reports the presence of Liassic deposits elsewhere in Madagascar. Comparison with Saudi Arabia shows that certain Bajocian mollusks appeared there and in Madagascar earlier than in Europe.
Observations micropaleontologiques (foraminiferes) sur le Carbonifere marin du bassin de Fort-Polignac (Sahara oriental)
Authors: Durif Paul
Published: June 2020

Summarizes the results of micropaleontologic studies of the foraminiferal fauna of marine Carboniferous deposits of the Fort-Polignac basin in the eastern Sahara. Deposits at the base of the section (mainly Visean) are poor in microfossils, but beginning with the Collenia beds the microfauna is rich. Archaediscus is abundantly represented in the lower part (Namurian) and Profusulinella at the top (Moscovian).
Byrozoaires du Lutetien de Bois-Gouet (Loire-Atlantique)
Authors: Balavoine Pierre
Published: June 2020

Forty-six species have been identified in the bryozoan fauna of the Bois-Goueet area, France. New species, which are systematically described and figured, are Idmonea rostrigera, Micropora gouetensis, Romancheina gouetensis (first appearance of this genus in Europe), Poricella davidi, and Macroporina gouetensis n.g. n.sp. Thirty of the species are exclusively Lutetian; the other 16 are also found in the Bartonian or Priabonian.
Le crane de Plesiadapis; note preliminaire
Authors: Russell Donald E.
Published: June 2020

Describes an excellently preserved mammalian skull, assigned to Plesiadapis, found in Thanetian (Eocene) deposits near Reims, France.
Introduction a la seance specialisee sur les milieux recifaux
Authors: Alloiteau James
Published: June 2020

Introduction to a discussion on reef environments, which was the subject of a meeting of the Societe Geologique de France in May 1959. The need for precise definitions and terminology is stressed.
La formation oolithique a polypiers de la Mouille (Haute-Saone)
Authors: Beauvais Louise
Published: June 2020

The upper Argovian (Jurassic) coral- bearing oolitic formation of the Mouille forest area, France, rests on a lower Argovian madrepore-bearing reef. Reef growth was apparently halted by subsidence at the end of lower Argovian time, and fields of crinoids grew on the reef surface. Subsequently slight uplift of the sea bottom led to deposition of the oolite, with development of a few new Donacosmilia colonies.
Calcaires a polypiers, recifs et atolls du sud de Madagascar
Authors: Collignon Maurice
Published: June 2020

About 30 reefs carrying a rich madrepore fauna occur in a limestone formation extending from Betioky to Ankazoabo in southern Madagascar. Some typical atolls are also found. The limestone is considered to represent the remnant of a great barrier reef that existed in upper Bajocian to upper Bathonian (Jurassic) times.
Influence des morts-terrains sur l'exploitation des materiaux de construction
Authors: Bonte Antoine
Published: June 2020

The permeability or impermeability of the overburden is an important factor in the exploitation of construction materials. Examples of carbonate rocks and of sand and gravel occurrences at various localities in France are cited to demonstrate the favorable or adverse effects of alteration, cementation, and other processes associated with downward percolation of meteoric waters.
De la "periodicite" des glaciations
Authors: Matschinski Matthias
Published: June 2020

Glacial periods are classified into eight types on the basis of the phase relations of climatic curves (temperature, nebulosity, etc.) and "glacial" curves (amount of space occupied by ice caps and glaciers on the earth's surface). The three characteristic features are the phase (positive or negative), increase or decrease in nebulosity in passing from one glacial period to another, and parallel or inverse variation of glacial maxima with climatic maxima.
Dolomitisation de la serie devono-dinantienne dans les Pyrenees de la Haute-Garonne et de l'Ariege
Authors: Pelissonnier Hubert
Published: June 2020

In the central Pyrenees of Haute-Garonne and Ariege, France, dolomitization of the Devonian-Dinantian (Carboniferous) series in the axial zone appears to be clearly related to the Pyrenean faults, and is therefore epigenetic. In the massifs of the north Pyrenees, however, the dolomitization is more continuous and seems to be related to a particular stratigraphic level rather than to faults or fractures.
Quelques observations sur la morphogenese de Thecosmilia langi Koby
Authors: Beauvais Louise
Published: June 2020

Seven of the nine specimens attributed to Thecosmilia langi in the Koby collection of Jurassic corals from Swiss localities have been studied in detail. Although they exhibit characteristics resembling those of other species and even different genera (Montlivaltia and Latiphyllia, as well as Thecosmilia), they probably are only representatives of different stages of development in the same species, as Koby indicated.
Contribution a l'etude du developpement du plan de Pourtales chez les Eupsammidae (madreporaires); cas de Balanophyllia italica Michigan sp
Authors: Chevalier Jean Pierre
Published: June 2020

Study by means of serial sections shows that the anatomy of Balanophyllia italica (of the madrepore family Eupsammidae) is the result of a simple anastomosis of septa, which is irregular at first, but becomes progressively more regular.
Revue de quelques travaux de O. H. Schindewolf sur l'ontogenese suturale (ammonoides)
Authors: Sornay Jacques
Published: June 2020

Summarizes the principles of the ontogenetic study of ammonoid sutures and discusses some of the general characteristics of the morphology of the first sutural stages and the terminology used in their study. The relations between the major groups of Paleozoic and Mesozoic ammonoids according to O. H. Schindewolf (based on his studies of sutural ontogeny) are presented, and the suture of Spiroceras, the systematic position of Strenoceras, and the importance of the umbilical lobe for the classification of Jurassic ammonites are discussed in the light of Schindewolf's concepts.
La reproduction chez les insectes blattaires du Carbonifere; facteurs du panchronisme et classification naturelle de l'ordre
Authors: Laurentiaux Daniel
Published: June 2020

The mode of reproduction of Carboniferous cockroaches (in protective chitinous cases) permitted post-Permian survival of the order. It serves as a basis for subdivision into the Eoblattodea and Neoblattodea. Details of the survival and evolution are discussed.
Le Cenomanien a blocs exotiques nord-pyreneen et le Wildflysch des Prealpes suisses; petrographie, paleo-oceanographie
Authors: Rech-Frollo Marguerite
Published: June 2020

A study of Cenomanian (Cretaceous) deposits containing exotic pebbles and boulders in the northern Pyrenees and the Wildflysch deposits of the Swiss Prealps shows that their facies are essentially identical. They are littoral deposits formed during a regime of rapid uplift accompanied by intense erosion, under unique climatic conditions that have no present-day counterpart.
La cuvette synclinale du Bas-Medoc
Authors: Caralp Michelle , Moyes J. , Vigneaux M.
Published: June 2020

Detailed micropaleontologic and lithologic study of Tertiary formations traversed by two borings at Hourtin (Gironde, France) reveals the presence of a deep local syncline in the lower Medoc area, whose formation was associated with dislocation of the Carcans anticline. The syncline constitutes evidence of recent deformation related to Aquitanian (Tertiary) stabilizing movements.
Etude geologique de la partie centrale du massif granitique de Gueret (Creuse, Massif Central francais)
Authors: Vialon Pierre
Published: June 2020

The crystalline rocks of the Gueret plateau in the Central Massif of France consist essentially of the so-called Gueret granite and anatexites known as the Aubusson gneiss. The granite exhibits both intrusive and anatectic features. A detailed petrographic study indicates close relationships between the granite and the gneiss and, together with lead-alpha age determinations on zircon, supports the conclusion that the Gueret granite represents a local late-stage product of the Aubusson gneiss formed during remobilization of the migmatitic basement.
Un serpent terrestre dans le Cretace inferieur du Sahara
Authors: Hoffstetter Robert
Published: June 2020

Describes a new snake, Lapparentophis defrennei n.g. n.sp., from continental lower Cretaceous deposits of In Akhamil on the edge of the Tinrhert basin (Algeria) in the Sahara. It resembles Simoliophis, particularly in the anterior thoracic region; however, Simoliophis shows adaptations for swimming that are absent in Lapparentophis. The latter is believed to represent a terrestrial group from which the marine Simoliophis evolved in the Cenomanian.
A propos du genre Replidacna Jekelius, cas teratologique des limnocardiides neogenes
Authors: Gillet Suzette
Published: June 2020

The pelecypod genus Replidacna was created by Jekelius to include a series of small species of Limnocardium from the upper Miocene of Banat, Romania, distinguished by exaggerated development of the hinge. Similar species have since been found in the Pannonian of the Vienna basin. The discovery of a large number of such shells in the Limnocardium microfauna of Pliocene deposits of Catalonia (Spain) leads to the conclusion that Replidacna merely represents teratologic forms of Limnocardium, a few of which reached the adult state.
La succession stratigraphique representative du Nummulitique girondin, dans le sous-sol de la presqu'ile d'Ambes, au nord de Bordeaux
Authors: Ducasse Odette , Veillon M. , Vigneaux M.
Published: June 2020

The stratigraphic sequence of the Nummulitic in Gironde, France, is worked out, on the basis of a lithologic and micropaleontologic study of the continuous section revealed in a well on the Ambes peninsula, and interpreted in terms of the typical Nummulitic sequence of the Bordeaux region. Basal Eocene to Oligocene formations are represented in the sequence.
Determination d'un critere pratique des differenciations magmatiques
Authors: Macheras Georges
Published: June 2020

Variation curves of the content of oxides as a function of the silica content of igneous rocks is usually used to determine whether or not a suite of chemically analyzed rocks belongs to a single differentiation series. In this paper a single curve of the variation of "calculated density" of each of the rocks in the series is proposed, which can achieve the same result. The method, application, and interpretation are discussed.
Les zones gypseuses anteludiennes preservees de l'Ile-de-France
Authors: Soyer Robert
Published: June 2020

In addition to the known occurrence of gypsum lenses in Ludian formations of the Ile-de-France area, gypsiferous deposits are also present in pre-Ludian Eocene formations. Because of their deep position they have been encountered only by chance during well drilling. Correlation of data from borings and other sources of information indicates that zones in which gypsum beds have been protected from leaching and replacement are widely developed in the pre-Ludian section.
Note sur la decouverte d'un gisement de vertebres continentaux dans le Trias du Haut-Atlas occidental
Authors: Arambourg Camille , Duffaud F.
Published: June 2020

Remains of continental Triassic vertebrates have been found north of Tizi Maachou in the High Atlas range, Morocco. The stratigraphy of the area is outlined, and the identified fossils briefly described. Stegocephalian amphibians, theropod reptiles, and a therapsid are represented in the fauna. A position high in the Triassic, probably Keuper, is indicated for the locality.
L'anatomie cranienne de deux creodontes du Paleocene de France
Authors: Russell Donald E.
Published: June 2020

Describes the cranial structure of two creodonts belonging to the genera Arctocyon and Arctocyonides from Paleocene localities of France. Reconstructed ventral and lateral views are shown.
Donnees micropaleontologiques sur les environs de Domingo-Perez (chaine subbetique, prov. de Grenade, Espagne)
Authors: Linares Rodriguez Asuncion
Published: June 2020

Summarizes data on microfaunas identified in upper Cretaceous, Eocene, and Miocene localities near Domingo-Perez, in the Subbetic range of Granada, Spain. Hantkenina is abundantly represented in one of the Eocene zones.
Etude palynologique preliminaire du bassin houiller de Lorraine; application a la correlation des couches
Authors: Alpern Boris
Published: June 2020

Preliminary results of qualitative and quantitative analyses of microspores from Carboniferous coals of the Lorraine basin, France, are presented in the form of five palynologic sections, four in seams being exploited in the Westphalian C and D (Merlebach, Cuvelette, Simon, and Sainte-Fontaine) and the other in the Valmont 1 borehole. Correlations between the five sections are suggested; these are based on the use of Densosporites, Lycospora, Torispora, Crassosporites, Punctatosporites, and Verrucososporites as guide genera.
Classification des pteridophytes et des pteridospermophytes du Carbonifere
Authors: Corsin Paul
Published: June 2020

Carboniferous pteridophytes and pteridospermophytes are subdivided into classes, orders, and families on the basis of the character of their sporangia and other fertile organs, habit (herbaceous, bushy, or arborescent), and the structure of the fronds.
Sur Estheria tenella et les Estheria du Permien inferieur
Authors: Feys Robert
Published: June 2020

The species Estheria tenella is revised. Even if the numerous polymorphic varieties of estherians are assigned to different families or genera, Estheria is a paleontologic entity of Autunian (Permian) age that is of definite stratigraphic value in western Europe.
L'epeirogenese mesocarbonifere et ses consequences
Authors: Termier Henri , Termier G.
Published: June 2020

Middle Carboniferous epeirogenic phases represent phases of uplift of continental and orogenic areas, which were accompanied by development of continental areas, erosion, detrital sedimentation, and climatic changes. These processes were responsible for modifications in floras and faunas toward middle Namurian time, thus justifying the distinction between lower and upper Carboniferous, and for the sequence of events that occurred up to the Saalian phase, during which the nonmarine character and arid conditions reflected in Permian and Triassic formations were accentuated.
Pringlia demaistrei nov. sp., un xiphosure (chelicerate) du Stephanien de la Loire
Authors: Vandenberghe Andre
Published: June 2020

Describes a new xiphosuran, Pringlia demaistrei n.sp., from the Stephanian (Carboniferous) of the Loire region, France. It exhibits close affinities with P. fritschi.
Le Kimmeridgien haut-marnais
Authors: Stchepinsky Vladimir
Published: June 2020

The stratigraphic boundaries and subdivisions of the Kimeridgian (Jurassic) of the upper Marne region, France, are defined. Data on the geographic distribution of Kimeridgian outcrops, fossils, and aquifers are included, as well as discussion of the position of the Kimeridgian in the geologic history of the area.
Oeufs d'oiseaux de tres grande taille dans l'Eocene inferieur de Provence
Authors: Touraine Fernand
Published: June 2020

Fossil bird eggs are known from six Thanetian (Eocene) localities in Provence, France. Their structure is similar to that of the eggs of large ratites. In size, they are intermediate between those of the living ostrich and the Quaternary Aepyornis. Two closely similar species are probably represented. In the absence of skeletal remains, it cannot be determined whether the eggs belong to an as yet unknown large ratite or to Gastornis.
Aspect structural du Medoc atlantique
Authors: Caralp Michelle , Vigneaux M.
Published: June 2020

Data from some 10 boreholes in the area south of the Gironde river mouth on the Atlantic coast of France show that there are three main structural elements below the Quaternary cover. From north to south, these are the Hourtin syncline, the faulted Carcans anticline, and the block-faulted section south of Carcans. These structural features controlled Tertiary deposition and, in particular, explain the lateral facies variations of Miocene formations.
Etude geotechnique du barrage de derivation de Mechra-Homadi (Maroc oriental)
Authors: Mortier Francois , Stretta E
Published: June 2020

The geology of the Beni-Snassen massif, eastern Morocco, in which the Mechra-Homadi diversion dam is located, is outlined, and the role of geology in the designing and construction of the dam and some of the principal geotechnical problems encountered are discussed. The dam site is located in downfaulted upper Jurassic formations of the western part of the massif, unconformably overlain by Miocene deposits.
Le probleme des structures tectoniques surimposees en Guyane francaise
Authors: Choubert Boris
Published: June 2020

Concentric structural lines several kilometers in diameter in the Precambrian of French Guiana, revealed by aerial photographs, are confirmed by field work. These structures may represent a granitization front whose surface is characterized by the development of domes and basins, or it may reflect the effects of superposition of the granitic structures on a preexisting structure.
Precisions nouvelles sur Libytherium maurusium Pomel, giraffide du Villafranchien d'Afrique
Authors: Arambourg Camille
Published: June 2020

A new reconstruction is made of mandible fragments constituting the type of Libytherium maurusium from the Villafranchian (Pleistocene) of Africa, and numerous remains of Sivatherinae from localities in northern and eastern Africa are assigned to this genus.
Observations stratigraphiques et tectoniques sur le Bathonien superieur de l'Aisne
Authors: Fischer Jean Claude
Published: June 2020

A study of the stratigraphic and structural relationships of the upper Bathonian (Jurassic) of Aisne, France, clarifies fundamental correlations and establishes more precisely the age of various structural features. Synclinal undulations are considered to have occurred before deposition of the upper Bathonian strata, not during a later pre-Cretaceous period, as previously thought.