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Book Chapter

Diapirs in Western Pyrenees and Foreland, Spain1

By
Roland Brinkmann
Roland Brinkmann
Bonn and Bentheim, Germany
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Herbert Lögters
Herbert Lögters
Bonn and Bentheim, Germany
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Published:
January 01, 1968

Abstract

The diapirs of the western Pyrenees and their foreland have cores mainly of salt and evaporites of Triassic (Keuper) age. Their shapes and tectonic positions differ. They are surrounded or overlain mainly by Cretaceous and Tertiary strata. Groups of diapirs demonstrate distinct alignments. The distribution of the diapirs is believed to be controlled by variation in the thickness of the Upper and Lower Cretaceous strata. These strata, which reach a maximum thickness of at least 8,000 m, exerted the necessary pressure to start the movement of the saliferous beds toward the flanks of the trough. Shifting of the trough axis in Late Cretaceous time separated the salt accumulation into two distinct welts. Diapirism started in Early Cretaceous time and must have reached its maximum during Late Cretaceous time, because most of the diapirs had reached the surface prior to late Tertiary time.

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Contents

AAPG Memoir

Diapirism and Diapirs: a symposium

Jules Braunstein
Jules Braunstein
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Gerald D. O’Brien
Gerald D. O’Brien
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American Association of Petroleum Geologists
Volume
8
ISBN electronic:
9781629812304
Publication date:
January 01, 1968

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