Normal faulting in British Pleistocene deposits

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Abstract
Examples of normal faulting affecting Pleistocene deposits of Gipping (Riss) age are described and discussed. It is concluded that small-scale trough-faulting at Stretton on Fosse, Warwickshire, is due to tension induced by cooling of frozen ground in winter. Largerscale faulting has been temporarily exposed in motorway cuttings near Kilsby, Northamptonshire, and near Narborough, Leicestershire. The faults resemble those at Stretton, but are more widely spaced, have much larger throws, and lack associated minor faults. This largerscale faulting is interpreted in terms of reactivation of earlier fractures as a result of updoming due to isostatic recovery after retreat of the ice. There is some correlation in trend-direction between the Pleistocene faults and the post-Triassic faults in the Pre-Cambrian rocks of Charnwood Forest. The fault-movements appear to have been completed shortly after the Gipping Glaciation. Comparable faulting in the Netherlands and Germany and a few possibly similar cases in Britain are mentioned.

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