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IV.—The Correlation of the Devonian Rocks of North Devon with those of other localities

Published online by Cambridge University Press:  01 May 2009

John W. Evans
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Extract

The Dartmouth Slates of South Devon and Cornwall, which correspond, it would seem, to the Schistes d'Oignies of the Ardennes, are not seen in North Devon, but may be concealed by later rocks and be represented in South Wales and the Welsh Border by the Red Marls of the Lower Old Red Sandstone. It is possible that the Foreland Grits are a local facies of the upper portion of the Dartmouth Slates, just as the arenaceous Cosheston Group is a local development of the upper part of the Red Marls. Both the Foreland Grits and the Cosheston Group appear to have yielded the typical Old Red Sandstone plant Psilophyton.

Type
Original Articles
Information
Geological Magazine , Volume 6 , Issue 12 , December 1919 , pp. 547 - 549
Copyright
Copyright © Cambridge University Press 1919

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References

1 The author is not inclined to accept the view that the Foreland Grits are a repetition of the Hangman Grits, by faulting.