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Landslides and stratigraphy in the coastal outcrop of the Barton Clay

Landslides and stratigraphy in the coastal outcrop of the Barton Clay
Landslides and stratigraphy in the coastal outcrop of the Barton Clay
Geological surveying in soft rock landslide terrain with compound shaped landslides formed by slide prone horizons (SPH) cannot normally be comprehensive without subsurface investigations: the sharp angled shear surfaces of the compound slides result in the complete deformation of the in situ fabric and prevents exposure of the intact material located just above the SPH. The problem is illustrated with respect to the coastal outcrop of the Barton Clay in its type area in Christchurch Bay, Hampshire, UK. The extensive historical literature is briefly reviewed to show the difficulties experienced by the geologists seeking to give a comprehensive account of the stratigraphic sequence. Recent drilling through the most prominent SPH and a fortuitous exposure revealing details of a higher SPH has allowed details of the normally obscured part of the sequence to be revealed.
shear surfaces, compound landslides, lack of in situ exposure, previous studies
0016-7878
731-741
Barton, Max
eea85a67-8def-49a1-a48c-f332310388d9
Pearce, Richard B.
7d772b25-3ad0-4909-9a96-3a1a8111bc2f
Barton, Max
eea85a67-8def-49a1-a48c-f332310388d9
Pearce, Richard B.
7d772b25-3ad0-4909-9a96-3a1a8111bc2f

Barton, Max and Pearce, Richard B. (2015) Landslides and stratigraphy in the coastal outcrop of the Barton Clay. Proceedings of the Geologists' Association, 126 (6), 731-741. (doi:10.1016/j.pgeola.2015.10.001).

Record type: Article

Abstract

Geological surveying in soft rock landslide terrain with compound shaped landslides formed by slide prone horizons (SPH) cannot normally be comprehensive without subsurface investigations: the sharp angled shear surfaces of the compound slides result in the complete deformation of the in situ fabric and prevents exposure of the intact material located just above the SPH. The problem is illustrated with respect to the coastal outcrop of the Barton Clay in its type area in Christchurch Bay, Hampshire, UK. The extensive historical literature is briefly reviewed to show the difficulties experienced by the geologists seeking to give a comprehensive account of the stratigraphic sequence. Recent drilling through the most prominent SPH and a fortuitous exposure revealing details of a higher SPH has allowed details of the normally obscured part of the sequence to be revealed.

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More information

Accepted/In Press date: 21 October 2015
e-pub ahead of print date: 24 November 2015
Published date: December 2015
Keywords: shear surfaces, compound landslides, lack of in situ exposure, previous studies
Organisations: Civil Maritime & Env. Eng & Sci Unit, Paleooceanography & Palaeoclimate

Identifiers

Local EPrints ID: 387916
URI: http://eprints.soton.ac.uk/id/eprint/387916
ISSN: 0016-7878
PURE UUID: afb12c8b-d9d4-4c20-8944-0cf3056e56b1

Catalogue record

Date deposited: 16 Feb 2016 15:10
Last modified: 11 Dec 2018 17:39

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