bluuebunny/crossref_metadata_2025_split huggingface dataset:
L'horizon manganesifere de la moyenne Cote d'Ivoire
Authors: Molly E. W. 
Published: March 2020

Abstract
A zone of manganese ore of potential economic value occurs in Birremian (Precambrian) deposits of the central part of the Ivory Coast region, French West Africa. The ore was probably formed by transformation of manganiferous muds to gondites during intense metamorphic and tectonic activity at the end of the Birremian.
Role aquifere des alluvions tuffacees dans les vallees seches du Quercy
Authors: Astre Gaston 
Published: March 2020

Abstract
Discusses the role of calcareous tufa deposits in the ground-water hydrology of dry valleys, citing two examples of the occurrence of calcareous tufa in alluvial deposits of dry valleys of the Quercy region, France. The tufa is considered the product of subterranean deposition from waters, which at one time had emerged as a spring and deposited tufa on the surface at the foot of the valley slope, but which later percolated along newly formed lower-level fissures.
Stratigraphie du Cretace superieur et de l'Eocene inferieur dans la Chalosse de Montfort (Landes)
Authors: Cuvillier J. , Dupouy-Camet J. 
Published: March 2020

Abstract
An account of the stratigraphic sequence and depositional history of upper Cretaceous and lower Eocene deposits of the Chalosse de Montfort area, Landes, France, with special reference to the lateral and vertical variations of facies of the lower Eocene strata.
Donnees stratigraphiques nouvelles sur l' "Aalenien ferrugineux" (Yeovilien superieur) de Lorraine et en particulier dans le bassin de Nancy
Authors: Maubeuge Pierre L. 
Published: March 2020

Abstract
Presents stratigraphic and paleontologic evidence which supports the claim that three, not four, oolitic iron ore beds are present in the Aalenian (Jurassic) deposits of the Nancy basin and other parts of Lorraine, France.
La stratigraphie des limons quaternaires de la carriere Bouchon, a Ivry (Seine) et ses repercussions possibles sur la chronologie prehistorique
Authors: Bordes F. 
Published: March 2020

Abstract
Two zones of reworked deposits are identified in the Quaternary succession exposed in the Bouchon quarry at Ivry, Seine, France. Atypical upper Acheulian artifacts found in loams produced by alteration of the older loess cannot therefore be dated as upper Acheulian without further study of the stratigraphic relations of the enclosing loam, whose age may vary from Riss to Wuerm (Pleistocene) depending upon the circumstances of reworking.
Y a-t-il coupure ou continuite entre le dynamometamorphisme et le metamorphisme regional?; a propos d'observations pres du glacier de Tre-la-Tete [with discussion]
Authors: Perrin Rene , Roubault Marcel 
Published: March 2020

Abstract
Presents arguments in support of the concept that dynamometamorphic processes (recrystallization by mechanical deformation during which no material is added from sources outside the rock mass being deformed) and regional metamorphism (rock alteration accompanied by the additionof material from adjacent terrain or from depth) are parts of a same process and not distinct independent processes. The concordance exhibited by a differentially metamorphosed mass of Liassic limestones wedged in crystalline rocks of the Mont Blanc massif, exposed in a gorge near the tongue of the Tre-la-Tete glacier, France, is cited as an example of recrystallization which took place during the regional metamorphism associated with Alpine crustal movements.
Faune et morphologie des alluvions anciennes de l'Ornain et de l'Ante
Authors: Paque A. 
Published: March 2020

Abstract
The ancient alluvial deposits of the Ornain and Ante river valleys, Meuse region, France, are characterized by the presence of a mixed fauna and detrital material whose morphology indicates deposition in an extremely wet period during which there was extensive gullying and erosion.
Sur le minerai de fer oolithique de Moulaine et sur la presence dans ce minerai d'un mineral phosphate
Authors: Caillere Simonne , Kraut F. 
Published: March 2020

Abstract
Microscope and thermal analyses of material from various mineralized zones of the oolitic iron ore formation of Moulaine in the Longwy basin, France, reveal the presence of francolite, abundant kaolinite, and detrital quartz accompanied by mica, feldspar, and zircon. The ores were formed in a silica- and aluminum-rich carbonate milieu; the iron was concentrated almost completely in the oolites, in the form of a gel.
La faille de la Borne et ses mineralisations (Massif Central francais)
Authors: Lapadu-Hargues Pierre 
Published: March 2020

Abstract
The Borne fault traversing the Borne granitic complex in the Central Massif, France, is characterized by evidence of renewed movement and successive phases of mineralization. Subsequent to injection of granulites, with which formation of the fault was associated, gold-and sulfide-bearing veins were formed. During the second phase of mineralization barite and some argentiferous galena were deposited in fractures of the fault zone. The final phase of mineralization was essentially one of fluorite formation.
Quelques remarques sur Equisetum mytharum (Heer) et sur ses gisements dans l'est et le sud-est de la France
Authors: Ricour Jean 
Published: March 2020

Abstract
Detailed description of remains of Equisetum mytharum from Triassic deposits of eastern and southeastern France. The distribution of E. mytharum localities indicates that the Triassic of the Alpine zone was not completely isolated by a land barrier from the Triassic basins of Provence and Lorraine.
Sur l'age de l'oolithe ferrugineuse dans le Jura neuchatelois et les regions voisines
Authors: Jeannet A. 
Published: March 2020

Abstract
The ferruginous oolitic formation in the Jura mountains of Neuchatel, Switzerland, and in other Jura localities are Callovian rather than lower Argovian in age. Both Callovian and Oxfordian (Jurassic) deposits, considered by some to be absent in the central Juras, were found to occur throughout the region, although generally in thin beds.
Observations sur la deformation d'un calcaire metamorphique (Adamello meridional)
Authors: Goguel Jean 
Published: March 2020

Abstract
Describes two samples of metamorphosed Anisian (Triassic) limestone from the central Adamello massif, Italy, exhibiting the effects of deformation which took place after metamorphism and after intrusion of the massif, and discusses the mechanics of deformation on the basis of experimental investigations and their interpretation. Deformation was essentially a process of solution and recrystallization, accompanied by fissuring throughout the limestone and by rotation of fragments in the less plastic zones of the limestone.
La faune des grauwackes de Chauffour pres Saint-Barthelemy (Maine-et-Loire)
Authors: Pillet J. 
Published: March 2020

Abstract
Describes the fauna (mainly trilobites and brachiopods) of Devonian graywackes of the Chauffour area, Maine-et-Loire, France, and discusses the age, probably upper Siegenian, of the graywackes.
Quelques mollusques du Cretace de Colombie
Authors: Basse Eliane 
Published: March 2020

Abstract
Describes ammonites from Coniacian (Cretaceous) deposits of the eastern cordilleran region of Colombia, and discusses the stratigraphic relations of Cretaceous formations along the cordillera on the basis of included faunas. Descriptions of new species of the new subgenus Donjuaniceras and the new genus Subprionotropis are included.
Anomalies et regenerations chez quelques Asterozoa paleozoiques
Authors: Lehmann W. M. 
Published: March 2020

Abstract
The abnormal number of arms-- generally four or six instead of the usual five--of several species of asterozoans from lower Devonian deposits of the Hunsrueck region, Germany, is attributed to processes of regeneration, such as can be observed in living ophiurans. Regeneration subsequent to partition of a normal ophiuran into one part with three arms and one part with two arms produced a six-armed and a four-armed ophiuran respectively.
Sur la formation de gneiss oeilles et de granites d'anatexie, d'apres des observations dans des zones orogeniques de differentes epoques
Authors: Gleditsch Chr. C. 
Published: March 2020

Abstract
Cites examples from Precambrian and Caledonian (early Paleozoic) terrain in Norway and from the French Pyrenees which demonstrate that anatectic granite is sometimes the final product of migmatization and that in zones of intense orogenic activity the granite is transformed into an augen gneiss.
Donnees nouvelles sur la geologie du Brianconnais oriental et sur le probleme de la quatrieme ecaille
Authors: Lemoine Marcel 
Published: March 2020

Abstract
Presents new data on the geology of the eastern Brianconnais region (defined here as the mountains lying between Oisans, France, to the west, and the Schistes lustres zone of Piedmont, Italy, to the east). At the latitude of Briancon, France, the zones of facies encountered from west to east are the Subbrianconnais, the Brianconnais, and the Gondran. It is suggested that the crystalline schists of the thrust slices of the eastern Brianconnais region are not outlying remnants of a Schistes lustres nappe, but are pre-Verrucano Paleozoic masses, lacking Carboniferous beds, which belong to the Gondran zone. The so-called fourth thrust slice merely represents an extreme westward extension of this series.
Sur la valeur stratigraphique de quelques inocerames algeriens
Authors: Voute C. 
Published: March 2020

Abstract
Several species of Inoceramus from Cretaceous formations of north Africa are valuable because of their rather restricted stratigraphic distribution. These include Inoceramus regularis radiosa (Campanian-Maestrichtian and sometimes Danian), I. labiatus (lower Turonian), and I. cycloides (middle Santonian). For each of these, synonymous forms described in the literature on north Africa, particularly Algeria, are listed.
Note sur la precision des tamisages mecaniques
Authors: Berthois Leopold , Berthois C. 
Published: March 2020

Abstract
A study of the error resulting from mechanical screening of sediments. Theoretically the more prolonged the time, the greater the accuracy of separation; actually, increasing the time increases the amount of breakage of grains, and hence the proportion of finer constituents increases at the expense of the coarser. The percentages of mean square error for different fractions of screened samples are calculated. The resulting figures are of the same order as those found by Gulinck, but somewhat lower.
Origine et mode de depot des "sables granitiques" miocenes entre Paris et la Manche
Authors: Pomerol Charles 
Published: March 2020

Abstract
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.
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.
Le Valanginien inferieur calcaire du grand canon du Verdon (Basses-Alpes)
Authors: Mongin Denise , Trouve Philippe  
Published: March 2020

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.
L'extremite orientale du massif de Bras et le "pli du Cannet" (Var)
Authors: Aubouin Jean 
Published: March 2020

Abstract
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

Abstract
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

Abstract
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.
Nouvelle revision des gisements a dinosauriens de la region de Saint-Chinian (Herault)
Authors: Lapparent Albert F. de 
Published: March 2020

Abstract
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

Abstract
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.
Cuvillierina eocenica, nouveau genre et nouvelle espece de foraminifere de l'Ypresien d'Aquitaine
Authors: Debourle Andre 
Published: March 2020

Abstract
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

Abstract
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

Abstract
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.