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The distribution of rudist facies in the Cretaceous carbonate platform deposits of the central-southern Apennines and Apulia have been compared from a biostratigraphic, palaeoecologic and palaeogeographic point of view. Particular time intervals related to the spreading of rudist communities inside a precise environmental setting have been considered. The analysis evidenced that sedimentological characters...
The taxonomy of caprinid rudists was hitherto mainly based on the arrangement of the pallial canals,the myocardinal organization being subordinate. Representatives of the Coalcomaninae, both primitive (Amphitriscoelus) and advanced (Coalcomana, Caprinuloidea, Mexicaprina) are here compared with those of the Caprininae (Caprina, Caprinula and Offneria), with emphasis on the myocardinal organization...
The Cenomanian and Turonian transgressions (Late Cretaceous) formed seaways through the Benue Trough (Nigeria) connecting the “Saharan Platforms” to the north (Niger) and the “Atlantic Margin” slope edge (“South Atlantic”) to the south. A biostratigraphical framework and precise correlations at the ammonite subzone and horizon level have been established providing a sound basis on which to compare...
A sedimentological analysis of the basal section of the Early Cretaceous, lacustrine LagarcitoFormation at “Loma del Pterodaustro” (San Luis, Argentina) and a summary of its biological components are presented. Three sedimentological facies can be recognized in the basal sequence of the Lagarcito Formation. Fossil remains are particularly abundant in laminated claystones of a facies interpreted as...
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