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Bathymetric mapping of the coastal and offshore geology and structure of the Jurassic Coast, Weymouth Bay, UK

Bathymetric mapping of the coastal and offshore geology and structure of the Jurassic Coast, Weymouth Bay, UK
Bathymetric mapping of the coastal and offshore geology and structure of the Jurassic Coast, Weymouth Bay, UK
Four hundred square kilometres of 1 m binned, full coverage swath bathymetry data, integrated with similar resolution onshore topography, have been used to generate a seamless onshore to offshore bedrock map covering an extensive area adjacent to the ‘Jurassic Coast’ World Heritage site. Analysis of these data provides new insights into the structural development of the Purbeck Monocline Cenozoic inversion structure; in particular, variations in the expression of strain between the hanging-wall block and the fault inversion zone. The footwall to the basin-bounding faults compartmentalized deformation and uplift, and acted as a buttress to compression. The data also show a limited thickness changes within the major lithostratigraphical divisions, and a notable absence of basin-related extensional faulting in the offshore area that is in marked contrast to the more extensively studied onshore region. This indicates that prior to inversion, the basin evolved by intermittent activity on a few major extensional faults. This improved understanding of the development of the basin and inversion structures results from our ability to integrate and quantitatively manipulate these high-resolution and spatially extensive offshore and onshore datasets.
0016-7649
498-508
Sanderson, David J.
5653bc11-b905-4985-8c16-c655b2170ba9
Dix, Justin K.
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Westhead, Keith R.
27a78cbb-c11c-462a-b89b-b3b8b9576ee7
Collier, Jenny S.
04a0fcc8-caeb-4f08-a967-a19e57d1a5e1
Sanderson, David J.
5653bc11-b905-4985-8c16-c655b2170ba9
Dix, Justin K.
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Westhead, Keith R.
27a78cbb-c11c-462a-b89b-b3b8b9576ee7
Collier, Jenny S.
04a0fcc8-caeb-4f08-a967-a19e57d1a5e1

Sanderson, David J., Dix, Justin K., Westhead, Keith R. and Collier, Jenny S. (2017) Bathymetric mapping of the coastal and offshore geology and structure of the Jurassic Coast, Weymouth Bay, UK. Journal of the Geological Society, 174 (3), 498-508. (doi:10.1144/jgs2016-070).

Record type: Article

Abstract

Four hundred square kilometres of 1 m binned, full coverage swath bathymetry data, integrated with similar resolution onshore topography, have been used to generate a seamless onshore to offshore bedrock map covering an extensive area adjacent to the ‘Jurassic Coast’ World Heritage site. Analysis of these data provides new insights into the structural development of the Purbeck Monocline Cenozoic inversion structure; in particular, variations in the expression of strain between the hanging-wall block and the fault inversion zone. The footwall to the basin-bounding faults compartmentalized deformation and uplift, and acted as a buttress to compression. The data also show a limited thickness changes within the major lithostratigraphical divisions, and a notable absence of basin-related extensional faulting in the offshore area that is in marked contrast to the more extensively studied onshore region. This indicates that prior to inversion, the basin evolved by intermittent activity on a few major extensional faults. This improved understanding of the development of the basin and inversion structures results from our ability to integrate and quantitatively manipulate these high-resolution and spatially extensive offshore and onshore datasets.

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More information

Accepted/In Press date: 29 November 2016
e-pub ahead of print date: 18 January 2017
Published date: 1 May 2017
Organisations: Geology & Geophysics, Ocean and Earth Science, Infrastructure Group, Southampton Marine & Maritime Institute

Identifiers

Local EPrints ID: 408612
URI: http://eprints.soton.ac.uk/id/eprint/408612
ISSN: 0016-7649
PURE UUID: a0273632-f564-4e73-9f8f-6706b8a6da0c
ORCID for David J. Sanderson: ORCID iD orcid.org/0000-0002-2144-3527

Catalogue record

Date deposited: 25 May 2017 04:02
Last modified: 07 Oct 2020 01:54

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Contributors

Author: Justin K. Dix
Author: Keith R. Westhead
Author: Jenny S. Collier

University divisions

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