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The early Tertiary deep-water sandstones near San Sebastian, Spain; some aspects of diagenesis

Published online by Cambridge University Press:  01 May 2009

G. J. Knox
G. J. Knox*
Affiliation:
The Shell-BP Petroleum Development Co. of Nigeria Ltd, Lagos, Nigeria
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Summary

Near San Sebastian, northern Spain, are outcrops of a system of deep-water fans deposited beyond the mouth of a submarine canyon from southward flowing currents. The sandstones consist of mixed siliciclastic detritals and carbonate fragments. The latter includes a derived heterogeneous marine fauna. Carbonate content varies and has played a major part in diagenesis. Early cementation by limited quartz and to a greater extent calcite involved local expansion. Later compaction has led to prominent pressure-solution phenomena of calcite and quartz with formation of microstylolites. Leaching owing to weathering has led to removal of some carbonate and formation of kaolinite from micas.

Type
Research Article
Information
Geological Magazine , Volume 113 , Issue 4 , July 1976 , pp. 341 - 348
Copyright
Copyright © Cambridge University Press 1976

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