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The buried channels of the Exe

Published online by Cambridge University Press:  01 May 2009

E. M. Durrance
E. M. Durrance
Affiliation:
Department of Geology, University of Exeter, Exeter, Devon.
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Summary

Seismic refraction surveys of the buried channels of the Exe near Exmouth indicate the presence of an early period of channelling into New Red Sandstone breccias to a base in excess of −52 m* followed by a period of gravel infilling of these channels and then their partial re-excavation to a base in excess of −30 m. Terraces formed during stillstands within the early regression occur at depths of −25, −31·4, and −36 m and within the later regression at −5·8, −10.4, −13.7, −17·1, −22 and −27·1 m. Control of the orientation of the channels by fault planes within the New Red Sandstone is also indicated. Correlation of the periods of channelling with early and late Weichselian sea-level lows is suggested, indicating a middle Weichselian (Paudorfian) age for the gravels. Similarities with buried channels occurring in Southern Ireland are noted and wider correlations attempted.

Type
Articles
Information
Geological Magazine , Volume 106 , Issue 2 , 20 April 1969 , pp. 174 - 189
Copyright
Copyright © Cambridge University Press 1969

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