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Syn-depositional deformation in a Cretaceous succession, James Ross Island, Antarctica. Evidence from vitrinite reflectivity

Published online by Cambridge University Press:  01 May 2009

A. G. Whitham
Affiliation:
British Antarctic Survey, Natural Environmental Research Council, High Cross, Madingley Road, Cambridge, CB3 0ET, U.K.
J. E. A. Marshall
Affiliation:
Department of Geology, University of Southampton, Southampton SO9 5NH, U.K.

Abstract

A detailed vitrinite reflectivity study has been made through the Cretaceous sedimentary rocks of northwest James Ross Island, Antarctica. The results show that a progressive increase in reflectivity does not occur with depth and that values (0.45 %) from the base of the succession are lower than expected for the sequence as described by previous authors. Using a synthesis of sedimentological and stratigraphic information, the sequence is reinterpreted as an apparent monoclinal syncline, strongly influenced by syndepositional tectonics, with a thickness appreciably less than previously described.

Type
Articles
Copyright
Copyright © Cambridge University Press 1988

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