bluuebunny/crossref_metadata_2025_split huggingface dataset:
Etude hydrogeologique du cours inferieur de la Moselle en France; apercu stratigraphique, tectonique et petrographique; resultats des travaux de sondages du barrage d'Apach
Authors: Laugier Raymond 
Published: March 2020

Abstract
The microfacies of the Voltzia sandstone (Triassic) are described in detail, on the basis of information from borings at the Apach dam site in the lower Moselle valley, France. Marls of Keuper facies are intercalated in the formation, which consists partly of sandy and partly of dolomitic beds (both of which are oolitic). Marine influences are evident. Mineralized ground water and a network of faults present difficulties for the dam project.
Resultats du sondage Murviel 1 de la Compagnie d'exploration petroliere; leur apport a la connaissance tectonique de la region de Montpellier
Authors: Gottis Maurice 
Published: March 2020

Abstract
The section traversed by a borehole in the core of the anticlinorium called the "Montpellier fold" permits analysis of the amount of northward displacement of the Jurassic range of the Montpellier region, France. This, together with information from earlier borings, shows that the Montpellier fold, the Gardiole area, and the Montbazin trough all constitute components of the same element of the sedimentary cover, which slid northward as a unit in very late Eocene time; its dip may be as much as 25 degrees N.
Remarques sur la charniere des Erycinacea et des Cyamiacea
Authors: Chavan Andre 
Published: March 2020

Abstract
A complete revision of the closely related pelecypod superfamilies Erycinacea and Cyamiacea has neither confirmed nor refuted hypotheses concerning their origin and supposed degeneration, but it has revealed the wide range of possible arrangement of the lucinoid type of hinge, from its nepionic expression to its accommodation to the intrusion of tooth 1. These arrangements are manifested in a very different order from that postulated by Douville; they are stable within families and support the divisions recognized by Dall and Cossmann. The Erycinacea and Cyamiacea therefore are not a haphazard grouping of baffling forms, but two rather ancient superfamilies of the heterodonts that can be classified in an orderly manner in spite of their great diversification.
Les problemes de la cartographie internationale des plissements et la feuille d'Algerie-Tunisie de la carte tectonique d'Europe
Authors: Caire Andre , Glangeaud Louis , Mattauer Maurice 
Published: March 2020

Abstract
the major structural units of the Algerian-Tunisian region, from south to north and from lowest upward, are the pre-Saharan units, corresponding to the autochthonous basement and comprising a Paleozoic craton and its cover; the intra-Tellian autochthonous complex; the semirigid Kabylian structure and its cover; the plastic Tell nappes; and the post-nappe Mio-Plio-Quaternary cover. Each of these units is described, the autochthonous, parautochthonous, and allochthonous units of the Tell region, Algeria, are defined, and the evolution of the Alpine orogeny in Algeria is outlined as a guide for the selection of symbols for representing the units on the Algerian Tunisian sheet of the international tectonic map.
Revision de Acastella rouaulti (de Tromelin et Lebesconte) 1875 (trilobite, eodevonien)
Authors: Pillet Jean 
Published: March 2020

Abstract
The trilobite Acastella rouaulti, the only representative of the Phacopacea yet known in the lower Siegenian (Devonian) Dalmanella monnieri sandstone of the Armorican massif, France, is redescribed on the basis of several specimens found in a better state of preservation than previously described specimens.
Le Trias du Jura, de la Bresse, de la plaine de la Saone et de la bordure nord du Massif Central (note preliminaire)
Authors: Ricour Jean , Horon O. , Lienhardt G. 
Published: March 2020

Abstract
Deep borings in the Saone and Bresse plains, France, show that the Triassic section of the western Jura mountains thins rapidly westward. All zones within the section exhibit a reduction in thickness. Triassic sedimentation is considered to have occurred in a gulf south of the emergent Morvan massif, which is believed to have reached the northern border region of the Central Massif. West of La Chatre certain variegated clays attributed to the Triassic are Liassic deposits instead.
Monnieria dans le Tithonique recifal de l'est des Cordilleres betiques
Authors: Astre Gaston 
Published: March 2020

Abstract
Specimens of small diceratids from Tithonian (Jurassic) reef deposits of the eastern Betic cordilleras belong to Monnieria or a closely related genus. Their presence suggests analogous reef environments during the Portlandian and Tithonian in southern Spain and the Languedoc region, southern France.
Sur la tectonique de la zone subbetique de la region de Huescar (prov. de Grenade, Espagne) et sur son Nummulitique
Authors: Foucault Alain 
Published: March 2020

Abstract
Defines structural units of the Subbetic zone north of Huescar, Spain. In order of probable superposition, these include, from bottom to top, the Virgen de la Cabeza unit (Dogger, Malm, lower Cretaceous), the Barranco de la Cueva del Agua unit (lower Liassic to Dogger), and the Moncayo-La Sagra unit (lower Liassic). The exact position of the Marmolance unit, with lower Priabonian (Jurassic) deposits at the base and upper Oligocene deposits at the top, is not known; at least it is known to be superposed on the Virgen de la Cabeza unit.
Micropoudingues et gres a galets mous du Westphalien C du bassin houiller du Nord-Pas-de-Calais
Authors: Dolle Pierre 
Published: March 2020

Abstract
Systematic sampling of the base of all beds of sandstone encountered in recent deep borings in the Nord-Pas-de-Calais coal basin, France, leads to some remarks concerning the correlation of the sandy sediments in the Westphalian C (Carboniferous). Sandstones with siderite pebbles are distinguished from the microconglomerates of ordinary sandstones. These terms are defined and explained.
Relations spatiales entre les pegmatites et les granites en Afrique centrale et a Madagascar
Authors: Varlamoff Nicolas 
Published: March 2020

Abstract
The spatial relationships of pegmatites and granites of central Africa and Madagascar are briefly described. Two groups of pegmatites are distinguished. The pegmatites of one group are directly related to the granite massifs and are arranged in fairly well-defined sequences of different types around the contacts. Those of the other occur at greater depth and are related to processes of gneiss formation, migmatization, and regional granitization. The two groups are very different in genesis and mode of emplacement.
Polypiers senoniens des environs de Padern (Aude)
Authors: Beauvais Marcel 
Published: March 2020

Abstract
Describes a new genus and species of coral from Senonian (Cretaceous) sandy and glauconitic limestones north of Padern in Aude, France--Elasmosmilia padernensis. The upper Santonian age of the limestones is established by the presence of Phyllosmilia complanata.
Les granites precambriens a Madagascar
Authors: Delbos Leon 
Published: March 2020

Abstract
The Precambrian granites of Madagascar are classified into three groups on the basis of mode of formation, petrographic and chemical composition, and age. The first group consists of the stratoid granites scattered over the whole island; these are often rich in allanite, and have been dated as 550 X 10 &lt;sup&gt;6&lt;/sup&gt; years old. The second group comprises the Ambatofinandrahana-Vavavato complex, an ancient metamorphosed massif having an apparent age of 1,100 X 10 &lt;sup&gt;6&lt;/sup&gt; years. The Ambatomiranty granites, characterized by a less common facies than other granites of the island, have the same apparent age. The third group is represented by the Anosyen granites. They are the product of alkaline metasomatism of plagioclasic rocks, accompanied by formation of abundant charnockites. Granitization is considered to have occurred in different stages, of which the most important is dated as 900 X 10 &lt;sup&gt;6&lt;/sup&gt; years, corresponding with the period of charnockite formation.
Etude geologique de la zone forestiere de la Joux, au nord-est de Champagnole (Jura)
Authors: Weber Christian 
Published: March 2020

Abstract
New data resulting from regional reconnaissance in the Joux forest zone northeast of Champagnole, France, are presented. They relate principally to details of the Jurassic stratigraphy, which has been clarified on the basis of horizons exhibiting distinctive microfacies. Interpretation of the tectonics was facilitated by a structure map contoured on the top of the Kimeridgian.
Sur la structure de la region d'Akjoujt (Mauritanie)
Authors: Destombes Jean Paul , Spindler J. P. 
Published: March 2020

Abstract
The Cambro-Ordovician age of the Akjoujt series in Mauritania is confirmed. It differs in composition from the equivalent pelitic-sandy series immediately to the east (Iriji). Its present form, an apparently thick synclinal series, is due to repetition in isoclinal recumbent folds and thrust slices of low dip that can be explained by gravitative gliding at the time of orogenic uplift. This structure is similar to that of areas to the south, in contrast to the less deformed structure of contemporaneous strata to the east. The folding may have occurred in the Caledonian. The geomorphology of the hills surrounding Akjoujt is explained by early burial in a deep graben of the entire folded series after the principal orogeny, and subsequent, relatively recent rejuvenation.
Sur la presence de galets eoliens dans le complexe de base de l'Adrar mauritanien
Authors: Bongrand Marie Odile , Dars R. , Sougy J. 
Published: March 2020

Abstract
Wind-faceted pebbles found at the base of the sandy Infracambrian formations of the Adrar region of Mauritania confirm the existence of Infracambrian desert conditions (paleoregs) and suggest the possibility of a new unconformity in the lower part of the basal complex capping the basement.
Decouverte de dents de palaeomastodontes dans la region de Zella (Tripolitaine)
Authors: Arnould-Saget Suzanne , Magnier P. 
Published: March 2020

Abstract
A description ofteeth of Palaeomastodon found in the Zella area of Tripolitania, Libya (by Arnould-Saget) and summary of the stratigraphy of the locality (by Magnier). The teeth are attributed to P. intermedius and the enclosing conglomerate to the lower Oligocene.
Sur les phenomenes de recristallisation dans la serie metamorphique du mont Pilat (Massif central); albitisation et retromorphose
Authors: Chenevoy Maurice 
Published: March 2020

Abstract
Analysis of the metamorphism of rocks of the Pilat massif and elsewhere in the Central Massif region, France, results in recognition of three types of metamorphic reconstitution-- textural rearrangement of primary minerals, development of instability of primary minerals without obliteration of the original mineralogic composition of the rock (retrograde metamorphism in its strict sense), and recrystallization. Albitization observed at various horizons is considered due to topochemical recrystallization rather than to introduction of soda by hydrothermal solutions.
Contribution de la sedimentologie a la stratigraphie de l'Eocene inferieur dans le sud-est du Bassin parisien
Authors: Michel Jean Pierre 
Published: March 2020

Abstract
Paleogeography of the southeastern part of the Paris basin during the lower and middle Eocene (Sparnacian-Ypresian-Lutetian) is revealed by X-ray sedimentologic study of sedimentary formations in the Chatillon-sur-Morin quarry near Esternay. Kaolinitic clays with small amounts of Sparnacian detrital materials represent deposition in lakes or lagoons. Attapulgite, indicating a regressive episode, occurs in the upper Sparnacian at Sezanne. The Cuisian (Ypresian) is made up of sandstones and kaolinitic clays overlain by marl becoming progressively more limy, and ending with siliceous limestone of the Sahara hamada type. The surface of the siliceous limestone is covered by attapulgite indicating a final regressive episode following progressive drying of the climate as revealed by increase in the amount of attapulgite upward in the Cuisian. The Lutetian (middle Eocene) is transgressive, with kaolinitic marl grading upward into freshwater limestone.
Sur l'origine des flyschs et des nappes de la Lucanie meridionale (Italie)
Authors: Glangeaud Louis , Grandjacquet Claude , Bousquet Jean Claude , Afchain Claude 
Published: March 2020

Abstract
In southern Lucania, from the Agri river south to Cetraro and the southwestern shore of the gulf of Tarento, and particularly near the Tyrrhenian (western) coast of Lucania, flysch of undetermined age and complex relationships is a major part of both autochthonous and allochthonous tectonic units. The fundamental problem is the paleogeography of different allochthonous flysch sequences of Mesozoic and Tertiary age. The second is the geographic origin of the flysch and the dolomitic limestone. Third is the mechanism and time of emplacement of nappes. The nappes of dolomitic limestones and the Cetraro gneiss plates behaved tectonically as rigid elements, quite differently from the plastic nappes of the allochthonous flysch. The fourth great problem is differentiating Mesozoic allochthonous flysch from that of Miocene-Pliocene age. Some of the allochthonous flysch may have come from the Tyrrhenian basin to the west.
Etude du Lutetien inferieur de Saint-Leu-d'Esserent (Oise)
Authors: Blondeau A. , Cavelier Claude 
Published: March 2020

Abstract
Stratigraphic, paleontologic and sedimentologic study of an escarpment on the right bank of the Oise river at Saint-Leu-d'Esserent, France, permits the division of the lower Lutetian beds into three zones corresponding to R. Abrard's zones I, II, and III. Zone I is characterized by Nummulites lamarcki and Lenita patellaris. It consists of coarse sands representing tumultuous sedimentation and limestones with a constant fauna indicating calm depositional conditions. The microfauna is similar to the Aizy Cuisian but the frequencies are different--Miliolidae do not exist in zone I. The zone I-II passage is progressive, marked only by the appearance of Nummulites laevigatus, the decrease in N. lamarcki and the disappearance of Lenita patellaris. The two zones seem to belong to the same group--lower Lutetian. The zone II-III boundary is clear, corresponding to a major change in bathymetry, the seas having become quite shallow. Zone III is characterized by the disappearance of glauconite and N. laevigatus and by the rapid increase of the Miliolidae and Orbitolites complanatus. These facts suggest that part of Abrard's zone IV--basal upper Lutetian--is also present. The granulometry and heavy mineral content of the beds are presented in tabular form. A complete list of the microfauna is given.
Les terrasses quaternaires des Andes venezueliennes
Authors: Tricart Jean , Millies-Lacroix Adrien 
Published: March 2020

Abstract
The extensive terrace deposits of the Venezuelan Andes reach a maximum thickness of 200 meters. They are widespread on the piedmont areas and in the interior longitudinal and transverse valleys. The oldest terrace--Pliocene-Villafranchian--is contemporaneous with the tectonic force which produced the Andean arch. The three younger terraces were deposited during the uplift of the Andes and the accompanying subsidence of the surrounding land. These deformations explain the staggering of the terrace levels which reach an altitude of 500 meters above the recent thalwegs. The terrace deposits are primarily the product of reworked latosols deposited before the uplift of the Maracaibo horst. The youngest terrace represents a transition between the second and third terraces and the recent alluvium. The alternating periods of erosion and deposition are the result of climatic oscillations. The three most recent alluvial covers (Quaternary) are the result of the blocking of the major valleys by mudflows and landslides interrupted periodically by cyclones and accompanying diluvial rains. Results of granulometric and petrographic analyses of the deposits are presented in tabular form.
Profils geologiques en Calabre sud-occidentale
Authors: Dubois Roland 
Published: March 2020

Abstract
The geology of southwestern Calabria (Italy) presents certain problems that are yet to be resolved. A zone of isolated dolomite outcrops is only a convenient term to relate rocks of similar lithology but does not imply paleogeographic continuity. Triassic and Paleocene fossils have been found in the dolomites but there is no evidence of continuous sedimentation and dolomitization may have contributed the appearance of continuity to the zone. A larger quartzitic schist zone extends from the Sila mountain to the Tyrrhenian coast. These thick beds are composed of sericite schist with quartz pebbles aligned parallel to planes of schistosity. Fossils have not been found but the zone is believed to be an allochthon or a para-autochthon related to the Hercynian sedimentary cycle. East of Sila a metamorphosed zone of crystophylline gneiss, crossed by granite veins, abruptly replaces the schists.
Introduction a l'etude du Quaternaire de la region de Teheran
Authors: Motamed Ahmad 
Published: March 2020

Abstract
At the foot of the Elbourz chain, in the vicinity of Teheran, is an irregular alluvial plain on which three phases of deposition can be observed. The Pliocene-Pleistocene formation, in the northern part of the plain is composed of poorly cemented conglomerates grading in the central area to a limonite formation. The lower Quaternary consists of alternating coarse and fine beds. The Quaternary of the highlands shows a zone of limey accumulation overlain by a clay and iron-rich zone from which the lime has been washed.
Donnees stratigraphiques nouvelles apportees par les bryozoaires sur le Miocene du bassin molassique de Rumilly (Haute-Savoie)
Authors: Miguet Roger , Mongereau Noel 
Published: March 2020

Abstract
The bryozoan fauna from two exposures of the marine molassic deposits of the Rumilly basin confirms the lower Helvetian-Vindobonian age of the upper series of deposits and the Burdigalian age of the lower series.
Nature et origine des eaux de Barbotan, Dax et Cauterets (Aquitaine)
Authors: Schoeffler Jacques , Coustau H. , Sourisse C. 
Published: March 2020

Abstract
Due to numerous data from petroleum exploration in Aquitaine, new hypotheses are advanced concerning certain thermal springs: Barbotan seems to issue from an aquifer in sands below molassic deposits; Dax flows from an upper Cretaceous aquifer; the Cauterets waters are iodine-rich as are the granites from which they flow.
Sur la nature et la genese des minerais de fer du Haut-Var; leurs relations avec la paleogeographie locale; rapports et differences avec les formations bauxitiques et les 'terra-rossa'
Authors: Rousset Claude 
Published: March 2020

Abstract
Goethite with marcassite nodules, precipitation in karst cavities of material leached from surficial glauconite marls, upper Eocene or Oligocene, France
Une grande serie detritique du Sahara; stratigraphie, paleogeographie et evolution structurale de la 'serie pourpree' dans l'Aseg'rad et le Tanezrouft oriental (Sahara algerien)
Authors: Caby Renaud , Moussu Henri 
Published: March 2020

Abstract
Two discordant series, lithology, paleogeography, Infracambrian-Cambrian
Les Glyptodontes du Pleistocene de Tarija (Bolivie): I. Genres Hoplophorus et Panochthus
Authors: Hoffstetter Robert 
Published: March 2020

Abstract
The glyptodonts of the Pleistocene of Tarija in southern Bolivia are little known. Only the genus Glyptodon has been described. New studies, in the field and in collections, establish the presence of five genera: Glyptodon, Chlamydotherium, Neothoracophorus, Hoplophorus, and Panochthus. Panochthus cf. tuberculatus and Hoplophorus echazui n. sp. are described in detail.
Observations preliminaires sur le comportement du lithium dans les roches d'epanchement d'Auvergne
Authors: Letolle Rene 
Published: March 2020

Abstract
Spectrometric analyses, using the isotopic dilution method, were performed on 20 samples from the Mont-Dore volcanic series (France). The procedure used is a modified version of the Smales and Webster method. Two series of values were obtained for the lithium content, one exceeding 50 ppm in the Permo-Carboniferous lavas, the other, 5-20 ppm for the basaltic lavas. No correlation is apparent between the percent of lithium and that of other alkalic elements although their chemical properties are similar. A correlation does exist, however, between the percent of lithium and silica. Lithium is preferentially incorporated in the magnesian minerals when the percent of magnesium diminishes in the residual magma.
Les laves acides de la cote orientale de Madagascar
Authors: Jeremine Elisabeth , Lenoble Andre 
Published: March 2020

Abstract
The upper pre-Senonian acidic lavas which form volcanic massifs in the Vohemar region rest directly on the crystalline basement and are considered the product of surface fissure flows. In the Nosy-Varika area these lavas can be divided into two major groups--rhyolites and dacites. The rhyolitic lavas are the most alkalic, the lightest-colored and the least calcic of all the rocks studied. They include alkalic rhyolites, rhyolites with plagioclase, and dellenites. The dacites contain andesine and labradorite. Sakalavites are also reported from the area and may represent the last phase of acidic emissions, possibly a transitional stage passing into the later basaltic lavas.
Observations sur la fenetre antecambrienne de la Snodola et sur la region septentrionale du 'Fjell' de Ringebu (Norvege)
Authors: Prost Andre 
Published: March 2020

Abstract
The region studied is situated between Gudbrandsdal and OOesterdal, in the northwest part of the sparagmite formation. The Precambrian is exposed in a fenster southwest of the Atna Archean fenster. The sequence of beds in this area differs from the Eocambrian of the type area and is barren of fossils. The units seem to be autochthonous or parautochthonous on the Precambrian, formed at the expense of the Archean. The repetition of sparagmite and dark schist at the top of the sequence suggests the presence of a nappe structure although the origin and extent of the folding is not evident.
Existence de deux phases periglaciaires, separees par un haut niveau marin, en Vendee
Authors: Ters M. 
Published: March 2020

Abstract
Two periglacial phases can be recognized on the Vendee coast of France, at Bretignolles. The first phase is represented by a sand-clay matrix in which are included microgranite blocks transported by mudflows from the Saint-Martin-de-Brem massif. Under the flow, the micaschist of the basement complex is locally disaggregated and forms a polygonal soil. These features are preserved by the sand and gravel deposits of the Tyrrhenian II transgression which depressed the shores and bays of the Vendee and Loire coasts of the Atlantic. The later periglacial phase produced garland tongues, V-shaped pockets, and frost cracks in the Tyrrhenian shore deposits.
Les mineraux lourds des terrasses quaternaires de Limagne d'Auvergne et les eruptions montdoriennes
Authors: Rudel Aime 
Published: March 2020

Abstract
Heavy mineral analysis of the Villafranchian Couzes valley alluvium, Chambon lake tuffs, and the basal alluvial sands of the Perrier formation reveals the presence of acicular augite. The mineral is also present in the volcanic sands at Arnats and the upper terraces at Limagne. The presence of augite in this form is linked to the volcanic activity of Mont-Dore. The augite was wind dispersed during the eruptions, to locations far from the craters. Its presence in the ancient Quaternary terraces and the Villafranchian tuffs and alluvium implies the existence of Mont-Dore eruptions of the same age.