Affiliation:
1. Soil Mechanics AssociatesGlossop House, Hogwood Lane, Finchampstead, Wokingham, Berkshire, RG11 4QW, U.K.
Abstract
AbstractIn the investigation for part of the M25 motorway near Denham, Buckinghamshire, several types of sheared and unsheared discontinuities were found within the Eocene London Clay and Reading Beds clays which are considered to have formed under Pleistocene periglacial conditions. These consisted of two types of low angle, near-surface solifluction shears with associated discontinuous, random accommodation shears. These overlay and truncated high angle shears believed to have formed by collapse on thawing of the top of the permafrost. Deeper, low angle shears of two types, one continuous, subhorizontal and planar, the other discontinuous, random and undulose, are tentatively attributed to shearing at the base of a permafrost layer at a thawing front. Subvertical, unsheared discontinuities are considered to be contraction cracks.
Publisher
Geological Society of London
Subject
Geotechnical Engineering and Engineering Geology
Cited by
8 articles.
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2. Engineering geomorphology of HS2: management of geohazards;Quarterly Journal of Engineering Geology and Hydrogeology;2022-05-13
3. Chapter 10 Periglacial geohazards in the UK;Geological Society, London, Engineering Geology Special Publications;2020
4. After the ice: Lateglacial and Holocene landforms and landscape evolution in Scotland;Earth and Environmental Science Transactions of the Royal Society of Edinburgh;2018-05-15
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