Investigation of suspected gulls in the Jurassic limestone strata of the Cotswold Hills, Gloucestershire, England using electrical resistivity tomography

Barron, A.J.M.; Uhlemann, S.; Pook, G.G.; Oxby, L.. 2016 Investigation of suspected gulls in the Jurassic limestone strata of the Cotswold Hills, Gloucestershire, England using electrical resistivity tomography. Geomorphology, 268. 1-13. https://doi.org/10.1016/j.geomorph.2016.05.028

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Abstract/Summary

An electrical resistivity tomography survey has clearly indicated the presence of substantial vertical zones of contrasting material beneath a set of conspicuous linear surface hollows that cut across a spur forming part of the Cotswold Hills escarpment in Gloucestershire. These zones are compared with nearby quarry exposures and are inferred to be gulls – graben-like structures at least 80 m deep filled with collapsed blocks of bedrock with intervening air-filled spaces, lying within areas of relatively undisrupted gently dipping strata, and which under some circumstances would present a significant geohazard. Our results confirm the great potential of this non-invasive and rapid survey technique for investigating such phenomena, and provide an exemplar for comparison with surveys elsewhere, to assist identification of similar features.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1016/j.geomorph.2016.05.028
ISSN:	0169555X
Additional Keywords:	Cambering, Gull, Electrical resistivity tomography, Cotswold Hills
NORA Subject Terms:	Earth Sciences
Date made live:	14 Oct 2016 10:32 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/514814

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