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Cross-Folding in the Gramscatho Beds at Helford River, Cornwall

Published online by Cambridge University Press:  01 May 2009

J. L. M. Lambert
J. L. M. Lambert
Affiliation:
Department of Geology, University College, Keele, Staffordshire.
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Abstract

Minor folds in the Gramscatho Beds at the mouth of the Helford River have two predominant trends: W.S.W.-E.N.E., and N.W.-S.E. Main folds on W.S.W.-E.N.E. axes and cross folds on N.W.-S.E. axes have sub-parallel apical planes and occur in alternate zones which trend N.E.-S.W., parallel to the strike of the cleavage. The relations between the two systems of folding suggest that they are virtually synchronous.

It is concluded that the style of folding can be explained by a unidirectional regional stress acting normal to the apical planes of the folds.

Type
Articles
Information
Geological Magazine , Volume 96 , Issue 6 , December 1959 , pp. 489 - 496
Copyright
Copyright © Cambridge University Press 1959

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