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Eustatic control of late Quaternary sea-level change in the Arabian/Persian Gulf

Eustatic control of late Quaternary sea-level change in the Arabian/Persian Gulf
Eustatic control of late Quaternary sea-level change in the Arabian/Persian Gulf
Accurate sea-level reconstruction is critical in understanding the drivers of coastal evolution. Inliers of shallow marine limestone and aeolianite are exposed as zeugen (carbonate-capped erosional remnants) on the southern coast of the Arabian/Persian Gulf. These have generally been accepted as evidence of a eustatically driven, last-interglacial relative sea-level highstand preceded by a penultimate glacial-age lowstand. Instead, recent optically stimulated luminescence (OSL) dating suggests a last glacial age for these deposits, requiring > 100 m of uplift since the last glacial maximum in order to keep pace with eustatic sea-level rise and implying the need for a wholesale revision of tectonic, stratigraphic and sea-level histories of the Gulf. These two hypotheses have radically different implications for regional neotectonics and land–sea distribution histories. Here we test these hypotheses using OSL dating of the zeugen formations. These new ages are remarkably consistent with earlier interpretations of the formations being last interglacial or older in age, showing that tectonic movements are negligible and eustatic sea-level variations are responsible for local sea-level changes in the Gulf. The cause of the large age differences between recent studies is unclear, although it appears related to large differences in the measured accumulated dose in different OSL samples.
Arabian Gulf, Persian Gulf, OSL, Luminescence, Sea level, Quaternary
0033-5894
175-184
Stevens, Thomas
06b0128b-bc73-46b0-aa48-777a01967b9e
Jestico, Matthew J.
fd30196d-280b-480a-bca3-e28240fcd7d3
Evans, Graham
91b97921-cf93-44fc-9f0d-d70b31a9d20d
Kirkham, Anthony
eaf838ea-6d22-4414-bae4-6ccaf49eeb7e
Stevens, Thomas
06b0128b-bc73-46b0-aa48-777a01967b9e
Jestico, Matthew J.
fd30196d-280b-480a-bca3-e28240fcd7d3
Evans, Graham
91b97921-cf93-44fc-9f0d-d70b31a9d20d
Kirkham, Anthony
eaf838ea-6d22-4414-bae4-6ccaf49eeb7e

Stevens, Thomas, Jestico, Matthew J., Evans, Graham and Kirkham, Anthony (2014) Eustatic control of late Quaternary sea-level change in the Arabian/Persian Gulf. Quaternary Research, 82 (1), 175-184. (doi:10.1016/j.yqres.2014.03.002).

Record type: Article

Abstract

Accurate sea-level reconstruction is critical in understanding the drivers of coastal evolution. Inliers of shallow marine limestone and aeolianite are exposed as zeugen (carbonate-capped erosional remnants) on the southern coast of the Arabian/Persian Gulf. These have generally been accepted as evidence of a eustatically driven, last-interglacial relative sea-level highstand preceded by a penultimate glacial-age lowstand. Instead, recent optically stimulated luminescence (OSL) dating suggests a last glacial age for these deposits, requiring > 100 m of uplift since the last glacial maximum in order to keep pace with eustatic sea-level rise and implying the need for a wholesale revision of tectonic, stratigraphic and sea-level histories of the Gulf. These two hypotheses have radically different implications for regional neotectonics and land–sea distribution histories. Here we test these hypotheses using OSL dating of the zeugen formations. These new ages are remarkably consistent with earlier interpretations of the formations being last interglacial or older in age, showing that tectonic movements are negligible and eustatic sea-level variations are responsible for local sea-level changes in the Gulf. The cause of the large age differences between recent studies is unclear, although it appears related to large differences in the measured accumulated dose in different OSL samples.

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More information

Published date: July 2014
Keywords: Arabian Gulf, Persian Gulf, OSL, Luminescence, Sea level, Quaternary
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 370808
URI: http://eprints.soton.ac.uk/id/eprint/370808
ISSN: 0033-5894
PURE UUID: c287362e-e2f7-403d-80c9-77db825c3ed5

Catalogue record

Date deposited: 06 Nov 2014 16:55
Last modified: 15 Jul 2019 21:39

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