bluuebunny/crossref_metadata_2025_split huggingface dataset:
Calcaires a polypiers, recifs et atolls du sud de Madagascar
Authors: Collignon Maurice 
Published: June 2020

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.
Donnees micropaleontologiques sur les environs de Domingo-Perez (chaine subbetique, prov. de Grenade, Espagne)
Authors: Linares Rodriguez Asuncion 
Published: June 2020

Abstract
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

Abstract
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.
Sur Estheria tenella et les Estheria du Permien inferieur
Authors: Feys Robert 
Published: June 2020

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.
Considerations biostratigraphiques sur les ostracodes des couches alternantes de l'Eocene moyen et superieur au sud de Bordeaux
Authors: Ducasse Odette , Vigneaux M. 
Published: June 2020

Abstract
Variations in associations of ostracods in middle and upper Eocene deposits of the Talence borehole, south of Bordeaux, France, are discussed in terms of facies changes. The data are used for defining the stratigraphy of the section and for interpreting paleoecologic conditions.
Donnees nouvelles sur la stratigraphie du Grand-Cabri et du Cengle (Bouches-du-Rhone)
Authors: Corroy Georges , Touraine F. 
Published: June 2020

Abstract
The Grand-Cabri hill in Bouches-du-Rhone, France, is not composed entirely of the Saint-Marc limestone (Thanetian), as has generally been accepted. Although the western part, downdropped by the Bimont-Saurine fault, is formed by this Eocene lacustrine limestone, the whole cap of the eastern part of the hill corresponds to the subhorizontal Meyreuil bank (Montian), which is equivalent to the Beaurecueil lens in the Montian marls of the Cengle hill. From this it follows that the main bank forming the cuesta of the Cengle, as well as the overlying birds' egg-bearing marls, is the equivalent of the Saint-Marc limestone. The very top of the Cengle is composed of Sparnacian and possibly also basal lower Lutetian deposits.
Problemes de la geologie de l'Antecambrien en Ahaggar (Sahara central)
Authors: Lelubre Maurice 
Published: June 2020

Abstract
Unconformities that can be traced for distances of many kilometers permit identification of chronologic units and interpretation of the geologic history of the Precambrian in the Ahaggar mountains of the central Sahara (Algeria). The Pharusian is represented by sedimentary and volcanic material filling huge tectonic troughs between asymmetric Suggarian blocks. The Suggarian and Pharusian correspond to two major orogenic cycles, in each of which general metamorphism preceded the major phases of folding. Migmatization developed toward the close of the folding phases, and progressed toward formation of increasingly more discordant granites and even toward rhyolitic volcanism. The structure as a whole is dominated by huge fractures dating from the end of the Suggarian cycle, which were subsequently rejuvenated and later controlled the deposition and evolution of the sedimentary cover.
Sur deux petits massifs suggariens presentant certains caracteres du facies In Ouzzal
Authors: Reboul Claude 
Published: June 2020

Abstract
Two small Suggarian (Precambrian) massifs, one in the northern Ahaggar mountains, Algeria, southwest of the Tihodaiene Erg and the other in the extreme southern part of the range east of Tin Zaouatene, exhibit similar characteristics. Both occur within Pharusian (Precambrian) basins, and the rocks are characterized by a facies resembling that of rocks of the distant In Ouzzal horst. Analysis of the mechanism responsible for development of this facies may throw light on the genesis of the rocks and on charnockitic facies in general.
Les madreporaires du Pliocene d'Orosei (Nuoro, Sardaigne)
Authors: Chevalier Jean Pierre 
Published: June 2020

Abstract
Describes madrepores (including Caryophyllia charrieri n.sp. and Dendrophyllia oroseiensis n.sp.) from Pliocene marls of the Orosei area, on the east coast of Sardinia, Italy.
Nouvelles donnees sur les diabases-porphyrites de la region de Sangineto (Calabre)
Authors: Bousquet Jean Claude 
Published: June 2020

Abstract
The northernmost outcrop of the diabase-porphyrite complex of Calabria, Italy, is in the Sangineto zone, long recognized as exceptionally complex. Results of studies are reported whose particular purpose was to define the upper and lower boundaries of the series of diabases and porphyrites, to describe the interrelationships of the varieties within the series, and to ascertain the relationships of these rocks to the nonvolcanic country rocks. Pillow lava structures recognized in many places suggest that the volcanic rocks are ancient submarine lava flows. Overlying limestones contain layers of breccia in which Tithinian (Jurassic) fragments have been identified, thus refuting the Triassic age previously assigned to them in the literature.
Etude granulometrique et mineralogique de douze echantillons de boue du fond du lac Majeur (Haute Italie)
Authors: Parea Gian Clemente , Wezel F. C. 
Published: June 2020

Abstract
Twelve samples of muds were collected from the bottom of Maggiore lake (northern Italy), at approximately equal intervals throughout the length of the lake in order to index the grain-size distribution and mineral composition of the muds. Most of the samples are typically lacustrine; some are typically fluviatile. The data indicate the presence of a significant amount of mineral matter in suspension throughout the lake as a result of strong currents generated by winds and by thermal variations in the lake waters.
Contribution a l'etude des Homanolotidae (Trilobites) des Gres a Dalmanella monnieri (Siegenien inferieur) du Massif armoricain
Authors: Pillet Jean 
Published: June 2020

Abstract
The Dalmanella monnieri sandstone of lower Siegenian (lower Devonian) age in the Armorican massif of northwestern France contains large numbers of a large Homanolotidae trilobite of an undescribed species. Several good specimens were obtained, although it is exceptional to encounter identifiable specimens. This species, previously overlooked or perhaps assigned to other species, is Burmeisteria (Digonus) armoricanus n. sp.
Echinides eocenes de la region d'Eskisehir (Anatolie occidentale)
Authors: Roman Jean 
Published: June 2020

Abstract
Seven species belonging to the genera Echinolampas, Conoclypeus, Ditremaster, Lutetiaster, and Macropneustes from the Eskisehir area of northwestern Anatolia, Turkey, indicate Lutetian (middle Eocene) age of these strata. E. dilatatus Ag. is considered equivalent to E. affinis (auctorum, non Goldfuss).
Note preliminaire sur la tectonique de la region de Castril (province de Grenade, Espagne)
Authors: Foucault Alain 
Published: June 2020

Abstract
The valley of the Castril river NE of Granada (southeastern Spain) exposes intensely folded and faulted formations otherwise concealed by Quaternary detrital deposits. An erosion surface slopes from an elevation of 1,100 m on the north to 950 m on the south. Conglomerates of early Quaternary (?) age lie upon the erosion surface, and to the north rises an escarpment of Cretaceous limestone. NE-trending thrust faults cut the area and large masses of Triassic gypsum occupy the thrust faults.
Quelques directions de courants dans le Buntsandstein de la Sarre et de la Lorraine septentrionale
Authors: Perriaux Jacques , Mueller Erwin M. 
Published: June 2020

Abstract
Study of the oblique and intersecting stratification planes of the lower Triassic Buntsandstein sandstone of the Saar and northern Lorraine region shows provenance was from south and west. Major current direction was W-E, but the SW-NE direction was important.
Propos sur les geosynclinaux
Authors: Aubouin Jean 
Published: June 2020

Abstract
Geosynclinal theory began with the characteristics found in the geosynclinal chains of the Alpine cycle in Europe, then, after much research, was modified to include Prealpine chains, the Hercynian (Variscan), Caledonian, and Precambrian. The fundamental organization is found to be the eugeosynclinal-miogeosynclinal couple. These couples are repeated in two types of symmetry, centrifugal and centripetal, in the manner of centrifugally-symmetrical bicouples. The classic chain's double character, with the median zone either an intermediate massif of the Zwischenberg type, an intermediate trough, or eugeanticlinal and eugeosynclinal folds, influences the orogenic, magmatic and metamorphic gradients toward the exterior. The eugeosynclinal-miogeosynclinal couple itself is defined by the paleogeography, the polarity, and the tectonic structures. Geosynclinal, tardigeosynclinal, and postgeosynclinal periods are recognized, but seem to be of lesser importance with greater age of the geosynclinal development.
Sur le Callovien moyen, l'Oxfordien et la base de l'Argovien entre Saint-Didier et Saint-Priest (Ardeche)
Authors: Yazdi Rouhollah 
Published: June 2020

Abstract
Results of a stratigraphical and paleontological study of the area between Saint Didier and Saint Priest (France) agree with recent data published on the stratigraphy of the area. Although it is agreed that the upper Callovian is missing, that the Oxfordian is also missing is rejected. Beds containing the characteristic Oxfordian Spinigera protea, Balanocrinus colloti, and B. subteres were encountered between Callovian and Argovian beds, and are therefore correlated with the Vesseaux microfacies.