ForaminiferarudistsammonitesThe stratigraphic distribution of the principal Upper Cretaceous facies in Sardinia ispresented, with special reference to the eastern part of the Island. Included are remarks on the mid-Cretaceous tectonic activity, which marks the base of the Upper Cretaceous depositional ...
SardiniaAlgeriaGondwanaResearch on the influence of sea level variations on the benthic faunas have been carried out in the Upper Ordovician of Sardinia. Study of the depositional facies and sequence analysis of the upper part (Lower Ashgill) of the Portixeddu Formation led to the identification ...
Botquelen, A., Loi, A., Gourvennec, R., Leone, F., Dabard, M.-P., 2004. Formation et signification paleo-environnementale des concentrations coquillieres: exemples de l'Ordovicien de Sar- daigne et du Devonien du Massif armoricain. Comptes Rendus Palevol, vol. 3, pp. 353-360....
In spite of the 87Sr 86Sr difference between basalt and andesite, a cogenetic relationship between these two kinds of rocks cannot be precludeddoi:10.1016/0016-7037(74)90121-5C DupuyR.H McNuttC CoulonElsevier LtdGeochimica Et Cosmochimica Acta...
A paleomagnetic study has been made about the calc-alkaline lavas (Late Oligocene-Middle Miocene age) and the Plio-Quaternary basaltic alkaline lavas of the Logudoro and Bosano (North West Sardinia). This study is based on the chronological scale of the volcanic phases of this part of ...
Description of a new species of Dasycladaceae, the morphological features of which allow to set it in the genus Triploporella STEINMANN, 1880, emend BASSOULLET et al., 1978, 1978. Calpionellids and benthic Foraminifera ascertain the valanginian age of its type-locality.Michel Jaffrezo and ...
A north-south chemical zoning is observed in the Cenozo茂c andesitic lavas of Sardinia. This zoning expresses itself in a gradual increase in K, Li, Rb, Sr in the north and in an enrichment in Fe in the south. The lavas have tholeiitic tendencies in the southern part of the island, ...
In a recent publication, C.Guernet picks up again the accusations of fraud against J.Deprat, who, in the early 20th century, had suffered such attacks to the point to be removed from the Geological Society of France. At the end of the same century, one among us (M D.D.) reexamined...
A hydrothermal origin associated with a rifting event is suggested for the manganese.doi:10.1016/S1251-8050(00)01405-1Jean-Franois Ghienne aDanièle Bartier aFrancesco Leone bAlfredo Loi bElsevier B.V.Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary ScienceGhienne,...
Palynologie des niveaux émersifs du Berriasien du Jura. Comparaison avec des spectres de Sardaigne et des PyrénéesSome pollen and spores assemblages of the Berriasian emersive facies of the Jura, Sardinia and Pyrenees are described and compared to the palynofloras of the purbecko-wealdian ...