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Le Crétacé terminal portugais et son apport au problème de l'extinction des dinosaures

Miguel TELLES ANTUNES & Denise SIGOGNEAU-RUSSELL

fr Bulletin du Muséum national d'Histoire naturelle, 4ème série – section C – Sciences de la Terre, Paléontologie, Géologie, Minéralogie 18 (4) - Pages 595-606

Published on 28 October 1996

The terminal Cretaceous of Portugal and its contribution to the problem of dinosaur extinction

The Beira Litoral area, in Portugal, which has yielded three main Late Cretaceous vertebrate localities was, at that time, an island. It thus constitutes a choice area for studying the role of insularity in extinction phenomena. It is clear that, in this area, faunal impoverishment and dwarfing, resulting from the reduction of terrestrial surface, were the prelude to the extinction, first of the large dinosaurs, and later, by climatic deterioration, of the small remaining forms. Consequently, in this case at least, it is not necessary to evoke catastrophic events to account for the extinctions observed.
Keywords :
Portugal, dinosaurs, Maastrichtian, insularity, extinction