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Geological Society, London, Engineering Geology Special Publications
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Geological Society, London, Engineering Geology Special Publications; 1991; v. 7; p. 283-331;
DOI: 10.1144/GSL.ENG.1991.007.01.27
© 1991 Geological Society of London

Session 2 Periglacial and Slope Processes

Theme lecture: Periglacial and slope processes

J. N. Hutchinson

Imperial College of Science, Technology and Medicine, Department of Civil Engineering, Imperial College Road, London SW7 2BU, U.K.

Following a palaeoclimatic outline of the Late Quaternary, the paper reviews the periglacial and slope processes which have most effect on engineering works, particulary with regard to relic forms of such features in Britain. The first topics covered are; frost heave and thaw consolidation, thermokarst and periglacial mass movements, with particular attention to periglacial solifluction and slope development. Ground water discharge features, comprising pingos, anomalous depressions in the London Basin and perforated clay feather edges, are then discussed, as are superficial valley disturbances in various geological settings. The paper concludes by exploring theoretical and geological approaches to the determination of the former depths of permafrost in Britain.