Alterites and bauxites as indicators of the European and Iberian margins of Western Pyrenees during Upper Jurassic-Lower Cretaceous, west of the Ossau valley (Pyrénées-Atlantiques, Franc

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• 作者：Combes ; Pierre-Jean ; Peybernè ; s ; Bernard ; Leyreloup ; André ; Franç ; ois
• 关键词：bauxites ; stratigraphy ; synsedimentary tectonics ; continental margin ; palaeoenvironment ; palaeoclimatology ; Pyrenees ; France ; bauxites ; stratigraphie ; tectonique synsé ; dimentaire ; marge continentale ; palé ; oenvironnement ; palé ; oclimatolog
• 刊名：Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science
• 出版年：1998
• 出版时间：August, 1998
• 年：1998
• 卷：327
• 期：4
• 页码：271-278
• 全文大小：731 K

文摘

Alterites and bauxites from Atlantic Pyrenees cropping out immediately west of the Ossau Valley (‘North-Pyrenean Zone’ in the literature) give information, by means of their ages within the Upper Jurassic-Aptian interval and of their depositional conditions (allochthonous or autochthonous) on the successive steps of the Iberian and European margins, about the extensional motions linked to the Lower Cretaceous rifting (opening of the Axial Basin). Pyrenean data are also interpreted in a larger Tethyan context where principal factors are the changes of climate, atmospheric CO₂-O₂ ratio and sea level.