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Basement blocks and tecto-sedimentary evolution in the Pyrenees during Mesozoic times

Published online by Cambridge University Press:  01 May 2009

Bernard Peybernès
Affiliation:
Laboratoire de Géologic Sédimentaire et Paléontologie, Université Paul-Sabatier, 39 allées Jules-Guesde, 31062 Toulouse Cédex, France
Pierre Souquet
Affiliation:
Laboratoire de Géologic Sédimentaire et Paléontologie, Université Paul-Sabatier, 39 allées Jules-Guesde, 31062 Toulouse Cédex, France

Abstract

The Alpine tectonics in the Pyrenean Range is controlled by motions of basement blocks (High Primary Range, North Pyrenean blocks). These blocks belong to different tectonic units; they are amygdaloid, wedge-shaped, squeezed at their roots, upthrust and displaced with their cover (detached or not) in a convergent shear zone between the European and Iberian plates. These basement blocks are distributed within isopic (isofacial) units with diachronous terrigenous prisms. The stratigraphical analysis of their Mesozoīc cover reveals their relative position during the Mid-Cretaceous continental break-up which induced the separation of the two previously joined plates.

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Copyright
Copyright © Cambridge University Press 1984

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