bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nouvelles donnees stratigraphiques et tectoniques sur le corridor de Boyar (province de Cadix, Espagne)
Authors: Chauve Pierre , Hoppe Peter 
Published: March 2020

Abstract
A stratigraphic study of the penibetic and subbetic series shows that the two are quite different. The subbetic--northern Boyar corridor--includes a well-developed Liassic with marly facies, a red nodular Tithonian, a Cretaceous, and a limestone-marl Eocene. In the penibetic, southern part of the Boyar corridor, the middle and upper Jurassic contain limestone units with coralligenous facies; and the middle Cretaceous is directly transgressive on the Tithonian limestones. The two series correspond to two distinct sedimentation regimes. Comparison of the different beds in the area indicates that the beds of the Los Majales and Fresnillo chains belong to the same stratigraphic and tectonic unit whose facies are totally different from the subbetic and are only slightly analogous to the penibetic. The northward thinning of the penibetic and the presence of Aptychus breccias and Tithonian belemnites in the Penon Grande area indicate the progressive passage of the penibetic into the Majales-Fresnillo beds which override the subbetic. These beds may have originated either from a zone between the penibetic and the Malaga nappe, or from a region more to the south in the sedimentation domain of the flysch nappes.
Forme des grains de quartz de sables et gres du Bresil
Authors: Bouillet Genevieve , Cailleux Andre 
Published: March 2020

Abstract
A total of one hundred ten samples of quartz grains, two-thirds of them from the southern and northeastern coastal regions and the lower Amazon valley, from sands and sandstones ranging in age from Precambrian to Recent have the same general characteristics found on other continents. Wind-worn grains are characteristic of the Devonian, Carboniferous, and Triassic. Water-worn grains are particularly abundant in the Tertiary of the Amazon basin. Grains in the Precambrian Minas Gerais series are unusally limpid and show relatively little wear. The tillite of the Carboniferous Itarare group in the southern coastal region contains abundant wind-worn grains of periglacial origin.
Dolerites intrusives dans le Lias et le Dogger d'Andalousie: leurs differenciations pegmatitiques alcalines et aureoles de metamorphisme
Authors: Busnardo Robert , Chenevoy Maurice 
Published: March 2020

Abstract
Three newly-discovered occurrences of upper Dogger (?) (middle Jurassic) dolerite in upper Lias to Dogger (Jurassic) formations of the Priego de Cordoba area of southern Spain resemble other dolerites of the region. The Las Navas dike and the Buitron sills are in Dogger marl, and the Las Lomas sill is in upper Lias (lower Jurassic) limestone. The contact metamorphic zones are proportional to the thickness of the tabular bodies, and exhibit only thermal characteristics. The thick Las Lomas sill transformed the initial six meters of overlying limestone to garnetiferous marble. Leucocratic enclaves of pegmatite are characterized by about 58 percent SiO &lt;sub&gt;2&lt;/sub&gt; as contrasted with about 50 percent in the dolerite.
Les ecailles du Devancon, a l'ouest de Rians (Var)
Authors: Rousset Claude 
Published: March 2020

Abstract
The northwestern part of the Rians syncline in southeastern France is overridden by the adjacent part of the Vautubiere anticline. Erosion of the overthrust mass left the Devancon hill as a rootless, internally thrust-faulted mass of Hauterivian (lower Cretaceous) limestone and marl, and Rognacian (upper Cretaceous) limestone and sandstone resting upon Eocene marl of the syncline.
Le massif de roches eruptives basiques et ultrabasiques de Laouni-Ouest (Hoggar meridional)
Authors: Donville Bernard 
Published: March 2020

Abstract
Gabbros, peridotites, and associated basic and ultrabasic rocks form the constituent rock types of the Laouni-Ouest massif in the southern Ahaggar mountains, Algeria. Details of their chemistry are reported. Study of the structure of the massif and relationships with the surrounding terrain leads to the conclusion that emplacement took place in a definite period of the Pharusian (Precambrian), following the major phase of folding but prior to the extensive granitization responsible for transformation of Pharusian crystalline schists.
Sur le Cretace superieur du Devoluy (Hautes-Alpes) et ses relations avec les regions voisines
Authors: Dubois Roland , Fontes J. C. 
Published: March 2020

Abstract
Six units are recognized in the upper Cretaceous section of the Devoluy massif in the French Alps. Their sequence and relationships are discussed, and it is noted that the section is essentially identical to that of the Vercors massif.
Le Stampien et l'Aquitanien ligures
Authors: Lorenz Claude 
Published: March 2020

Abstract
Facies of transgressive deposits in Liguria (Italy) are so uniform that former stratigraphic divisions were based on rock type boundaries which cross time boundaries. On the basis of the fauna, the earlier work is corrected and the Sannoisian is reclassified as a lagoonal facies of the lower Stampian. Other formations, attributed to Stampian and Chattian are now assigned to the Aquitanian. Further stratigraphic revision places the transgression onto the Volta group between the lower and upper Stampian, while further to the west, transgression onto the northern slopes of the Ligurian Alps did not occur until the lower Aquitanian. Extensive folding and faulting occurred in the area during the Stampian and Aquitanian.
Sur les variations d'age et de facies des formations tertiaires sur la bordure meridionale des monts Peloritains (Sicile)
Authors: Truillet Rene 
Published: March 2020

Abstract
An Eocene series of calcareous schists and fine grained micaceous sandstones known as the Piedimonte formation in the Zambataro valley of Sicily (Italy) is identical to the Reitano flysch series. A NW-SE trending fault throws the Piedimonte up against the Oligocene to Miocene Peloritani molasse at its southeastern extension. Both formations are unconformably overlain by the Monte Soro flysch. In those areas where the Piedimonte has not been faulted, it is not affected by the Miocene tectonics that deformed the Reitano flysch.
Neritopsis legrosae, espece nouvelle de gasteropode du Dogger italien
Authors: Bourrouilh Robert , Rasplus Leopold 
Published: March 2020

Abstract
A new species of lower Bajocian gastropod, Neritopsis legrosae, is described. The specimen was found in the Castello Terino region of Italy, 55 km northeast of Trento. The test is nearly planispiral, with a differentiated umbilicus. It has a large last whorl and a large round aperture. The ornamentation consists of eight transverse ribs and five regularly spaced major longitudinal ribs with numerous minor longitudinal ribs in between. Transverse striations cross the longitudinal ribs to form a lattice pattern. This specimen seems to agree with the generalization that the more closely planispiral the test becomes, the more differentiated the umbilicus tends to become. Neritopsis legrosae moderately resembles Neritopsis planispira Gamellaro but has different ornamentation.
Tectoniques superposes et metamorphisme dans la bande cristallophyllienne d'Aracena (province de Huelva, Espagne)
Authors: Bard Jean Pierre 
Published: March 2020

Abstract
Structural analysis of the Paleozoic formations of the Aracena metamorphic belt reveals the presence of four main deformational phases all of which belong to the Hercynian orogeny: a first phase of NW-SE synmetamorphic isoclinal folds overturned toward the southwest and penecontemporaneous with migmatization; a second phase of WNW-ESE orthorhombic folds with axes slightly overturned toward the south-southwest, accompanied by S &lt;sub&gt;2&lt;/sub&gt; schistosity fracture and late epizonal granitic intrusion; a third phase of thrusting and shearing toward the south-southwest; a fourth phase of NE-SW displacements measurable in kilometers. Estimation of the geothermal value of the synmetamorphic phase ( nearly equal 80 degrees C/km) places the Aracena belt among the high temperature-low pressure types.
La tectonique et la geologie de la partie orientale du bouclier bresilien
Authors: Suszczynski Edison F. 
Published: March 2020

Abstract
The Brazilian shield comprises two separate units. The Precambrian crystalline basement, in the eastern part of the shield, is divided into three parts distinguished by their lithology, structural trend, and mineralizations. The sedimentary cover contains a folded series of formations ranging in age from terminal Precambrian to early Paleozoic and an unfolded series represented by sediments of lower Devonian to Tertiary age which were deposited in epicontinental, intracratonic, and coastal basins. Four phases are recognized in the evolution of the unfolded sedimentary series. The effects of geologic processes active in the Brazilian shield from the end of the Precambrian to the end of the Mesozoic have been observed in the Parnaba-Sao Francisco intracratonic geosyncline. Results of age determinations are reported.
Variation intraspecifique chez Goniothyris buckmaniana (Walker-Davidson), terebratule du Dogger inferieur (Moyen Atlas, Maroc)
Authors: Rousselle Lucienne 
Published: March 2020

Abstract
Continuity in the distribution of the morphologic characters of terebratulids from two samples has led to the reduction of the long-established taxa phillipsiana and lowensis from specific to infraspecific rank. The taxon buckmaniana, usually considered in Europe as a variety of Lobothyris buckmani, seems to be, in the Middle Atlas, completely unrelated to this species. The morphotypes lowensis, buckmaniana, and phillipsiana are considered as parts of a polytypic species which evolved in the Dogger [Jurassic] and may be related to Goniothyris. The influence of ecologic factors on the modification of the morphotypes and on their distribution in this species is noted.
Gradients cristallogenetiques dans l'espace et dans le temps
Authors: Deicha Georges 
Published: March 2020

Abstract
Microscopic observation of the development of crystal nucleii and growth provides a better understanding of the heterogeneity of crystal structure and composition. The crystallogenetic disequilibrium of diamonds is clearly illustrative under high pressure conditions. The laboratory studies can be related to differences in magmatic and hydrothermal environments and their effect on mineralization.
Sur quelques genres de Madreporaires peu connus de l'Argovien superieur suisse
Authors: Beauvais Louise 
Published: March 2020

Abstract
Several rare genera from the Discothomosphinctes warte horizon of the Bernese Alps of Switzerland were placed in the Cyathophyllidae family by Koby, who considered them closely related to Paleozoic Madreporaria. These genera subsequently were placed in the Mitrodendronidae family by Alloiteau. Recent study of the type species of these genera indicates revisions are necessary. Lingulosmilia and Sclerosmilia are identical to Cheilosmilia. Cheilosmilia kobyi n. sp. is described from the upper Argovian (upper Jurassic). A new genus Schizosmiliopsis of the Stylinidae is proposed, and Schizosmiliopsis corallina (Koby) is proposed for Koby's Schizosmilia corallina. His genus Schizosmilia is left uncertain because the type specimen has disappeared.
A propos de Flabellothyris oranensis (Flamand), brachiopode du Dogger moyen
Authors: Rousselle Lucienne 
Published: March 2020

Abstract
A critical restudy of the brachiopod Flabellothyris oranensis from Si Slimane ben Moussa in northwestern Algeria, and various places in the eastern High Atlas and Middle Atlas mountains of Morocco, with respect to its vertical stratigraphic range and its relationships to associated fauna indicates Dogger (middle Jurassic) age--perhaps upper or terminal Bajocian, or lower Bathonian. The species is redescribed in accordance with the material at hand. Attention is called to the similarity between F. oranensis and F. dichotoma of the Bathonian (upper middle Jurassic) and Callovian (lowermost upper Jurassic) of India and Madagascar.
Une naiade geante (Lamellibranche limnique) dans le 'continental intercalaire' du Niger (Sahara meridional)
Authors: Mongin Denise 
Published: March 2020

Abstract
A new species of pelecypod of exceptional size, Cuneopsis giganteus n. sp., is described from the top of the middle Irhazer horizon (Wealden, Cretaceous) near the In Abangarit oasis of the Agades region of Niger in the southern Sahara.
Le Cretace des environs de Chabrieres (Basses-Alpes)
Authors: Thomel Gerard 
Published: March 2020

Abstract
The results of lithologic and paleontologic study of Cretaceous rocks of the Vocontian facies demonstrate that the massive upper Jurassic limestones are separated from Valanginian (lower Cretaceous) deposits by an erosion surface. Two series distinguishable in the Valanginian include a lower zone of marls and limestone containing a Berriasian fauna, and an upper zone of marls and limestones, less compact than those below, containing an upper Valanginian fauna. The Hauterivian is represented by a transitional zone of marls and limestones overlain by blue fossiliferous marls. The passage to the Barremian (lower Cretaceous) is transitional, marked by a zone resembling the thick-bedded Barremian limestones in which two members are recognized --thick-bedded limestone with interbedded schistose marl and fossiliferous marls and limestones with Emericiceras and Acrioceras in the lower part, and Holodiscus above. The uppermost Barremian bed is corroded, corresponding to an interruption in sedimentation. This surface is directly overlain by lower Albian-upper Aptian black marls, glauconitic in the upper part. Blue marls with Pervinquieria represent the Vraconian (upper Cretaceous). The Cenomanian, sparsely fossiliferous, is represented by blue marly limestones, sandstones and glauconitic sandy limestones. The Chabrieres Cretaceous series resembles the neritic facies to the south and the surrounding Vocontian domain. Sedimentation in the area is a result of slow uplift and subsidence, especially in the Valanginian.
Datation absolue des principales industries prehistoriques
Authors: Cailleux Andre 
Published: March 2020

Abstract
Recent research has shown that the last glaciation (Wuerm) was approximately 10,000-50,000 yrs B.P., and that the Quaternary is older than previously thought. Its lower limit is placed at the beginning of the Villafranchian--approximately 1,000,000 yrs B.P. The durations of the major prehistoric episodes are presented in a table illustrating their progressive acceleration in time, each episode being shorter than the preceding one. If this acceleration continues, the end of the Quaternary might fall around the year 2200 A.D.
Etude comparative des sables de la region de Saint-Prest (Eure-et-Loir)
Authors: Ayanian Paul 
Published: March 2020

Abstract
Sedimentological study of the sand deposits of Saint-Prest and Bercheres-la-Maingot permits a comparison of the Villafranchian Saint-Prest and Thimerais sands. Results of granulometric analyses reveal the predominance of coarse elements in the Saint-Prest deposits as opposed to the pelitic elements in the Clous Gaillards and Bercheres sands. The Bercheres sands are considered to be eolian due to the large proportion of dull, rounded grains; the Saint-Prest sands are fluviatile as indicated by the majority of glossy, blunted fragments. Although the Clous Gaillards sediment is less evolved than the Bercheres, it may also be an eolian deposit. Cumulative granulometric curves are included with a table giving the granulometric characteristics of the nine samples studied.
La periode glaciaire dans l'ouest des Pyrenees centrales franco-espagnoles
Authors: Barrere Pierre 
Published: March 2020

Abstract
Small glaciers of the true alpine type formed on the lower slopes of the northern Pyrenees. The morainic arcs left by these tongues are in contact with the diffluences of the principal glacier, indicating that these small glaciers descended before the main glacier reached the valley. The major valleys of the northern slope were occupied by tongues with multiple diffluences of the present Himalayan type. The larger glaciers, similar to the Alaskan type, extended in lobes onto the piedmont. The external moraines of these glaciers are Rissian as indicated by their relationship with the principal fluvioglacial terrace. The erratics on the slopes above and in front of the frontal moraine are related to an expansion phase of the Rissian glacier rather than to a separate advance because their morphoscopic and petrographic characteristics do not differ from the frontal morainic deposits. The internal moraines, by comparison with the Alps, can be attributed to the Wuerm. The volume of these deposits is less than the Rissian glaciers due to reduced morphologic activity in the Wuerm--especially on the southern slopes--and to the general retreat of glaciers prior to a long interglacial period.
Les depots fluvio-glaciaires du Bas-Dauphine; leurs mineraux argileux, leur radioactivite
Authors: Martin Annie 
Published: March 2020

Abstract
X-ray analysis of the clay fraction of Wuermian fluvioglacial deposits of Bas-Dauphine (Bievre-Valloire, France) shows a predominance of illite, lesser amounts of chlorite, and traces of kaolinite. The Mindel-Riss sediments also contain illite and kaolinite along with interstratified minerals and swollen illite. Formation of the two latter elements was favored by circulation of ground water which produced neogenesis in the same sedimentation medium. The Mindel-Riss sediments can be distinguished from the Wuerm sediments by their radioactivity--32-39 counts/min. and 12-16 counts/min., respectively.
Etude sedimentologique de quelques depots quaternaires marins entre Nice et Grimaldi
Authors: Miskovsky Jean Claude 
Published: March 2020

Abstract
Samples studied correspond to the former levels of the sea recognized in the Quaternary deposits between Nice and Grimaldi (southern France). The highest level recognized is at 165 meters, representing the end of the Pliocene; the second level, at 108 meters, represents the Calabrian; deposits at 90 meters are early Quaternary; the sea level at 30 meters is also early Quaternary--pre-Mindel-Riss; deposits at 11 meters correspond to the type Tyrrhenian (Riss-Wuerm). Granulometric analysis of elements less than 35 microns shows that the littoral deposits have a smaller proportion of fine elements than those deposited under several meters of water. The beach pebbles and littoral deposits contain poorly sorted coarse sand, while above, the wind-deposited marine sand is fine and well-sorted. These sediments belong to an interglacial period when eolian forces were minimal--a conclusion based on the scarcity of round, dull quartz grains. Granulometric curves are included.
Comparaisons des grandes etapes morphogenetiques du Quaternaire dans le Midi mediterraneen francais et au Maroc
Authors: Raynal Rene , Tricart Jean 
Published: March 2020

Abstract
Comparison of continental Quaternary deposits shows a parallelism between the chronology and morphogenesis of the Quaternary in Midi (southern France) and Morocco (north Africa). In Midi, three totally different regions are distinguished by their paleoclimates: the Roussillon area, characterized by a relatively dry climate; the Languedocian wastes, where the cold winters were often violent with radical temperature changes; and the Provence Prealps, where the basins were sheltered but benefited from higher summer humidity than in the Roussillon area. The Moulouyan pluvial (upper Villafranchian) is represented in Morocco by periglacial climate and extreme temperature changes, and in the Alps, by a major glaciation. The Saletian pluvial (Guenz) was cold and humid in both areas with strong regional contrasts between the three Midi regions. The Amirian (Mindel) in Morocco was warm and pleasant with a predominance of chemical alteration. In Midi, however, there was harsh cold, a contrast possibly due to a difference in atmospheric circulation. The Tensiftian pluvial (Riss) in Morocco was extremely cold with widespread glaciation. In Midi a periglacial climate prevailed with the formation of congelifraction gravels. The Soltanian (Wuerm) was less cold in both areas; in Morocco erosion decreased while in Midi there was an increase with no interruption in pedogenesis. The Holocene is represented in Morocco by an accumulation of terrace deposits and increased pedogenesis, and in Midi by decreasing stream erosion and deposition of sandy material.
L'inter Mindel-Riss dans l'Apennin central
Authors: Demangeot Jean 
Published: March 2020

Abstract
Examination of sections in the vicinity of the Gran Sasso chain (northern Italy) has provided data leading to the determination of the inter-Mindel-Riss paleoclimatic evolution. The presence of calcite in rock fissures and on ancient soil surfaces indicates that an interglacial period followed the last cold of the Mindelian--a period of rapid warming which caused the calcite to be precipitated. The formation of travertine can also be attributed to this phase. Clays deposited in the low areas contain abundant organic matter suggesting the continuation of warm, humid conditions in which vegetation developed and pedogenesis progressed. The heat and humidity increased, causing the limestones to dissolve completely to decalcification clays. The ironstone caps observed in the Guimentina valley mark the end of the evolution. After this a climatic crisis developed which involved semitropical processes and mechanical erosion by running water.
Observations sur des formes et depots quaternaires en Syrie
Authors: Dresch Jean 
Published: March 2020

Abstract
Three levels of Quaternary glacial erosion are recognized on the Senonian and lower-middle Eocene marls and limestones which crop out on the flanks of the discontinuous SW-NE folds of the Palmyran chain. These levels are preserved by expanses of debris and by caliche. They are comparable to deposits described from north Africa and are indicative of a humid climate. Jabal Hayane and Jabal Kehnzir are typical examples of the Palmyran folds. The anticlines are asymmetrical, closed, and composed of Cenomanian and Turonian limestones. They are often faulted, exposing the underlying gray Aptian sandstones and Bathonian evaporites and clays. The synclines, larger than the anticlines, are formed in Senonian and Eocene strata and are sometimes broken by cuestas of middle-upper Eocene limestones.
Quelques precisions sur les classifications du Quaternaire marocain
Authors: Biberson Pierre 
Published: March 2020

Abstract
Recent examination of Quaternary stratigraphic sections at the Sidi Abderrahman quarry and at Casablanca (Morocco) resulted in the definition of two episodes: the Harounian stage, a marine transgression equivalent to the Mediterranean Eutyrrhenian; and the pre-Soltanian substage of the Soltanian. The continental pre-Soltanian deposits are post-Harounian and pre-Ouljian, corresponding to the first part of the Alpine Wuermian. The Soltanian, previously correlated with the Mediterranean Grimaldian, actually belongs to the Grimaldian II and cannot be correlated with the European Wuermian formations.