Marine Isotope Stage 7-6 transition age for beach sediments at Morston, north Norfolk, UK: implications for Pleistocene chronology, stratigraphy and tectonics

Journal article


Hoare, Peter, Gale, Stephen, Robinson, Ruth, Connell, Rodger and Larkin, Nigel. (2009). Marine Isotope Stage 7-6 transition age for beach sediments at Morston, north Norfolk, UK: implications for Pleistocene chronology, stratigraphy and tectonics. Journal of Quaternary Science. 24(4), pp. 311 - 316. https://doi.org/10.1002/jqs.1267
AuthorsHoare, Peter, Gale, Stephen, Robinson, Ruth, Connell, Rodger and Larkin, Nigel
Abstract

Optically stimulated luminescence age estimates for the Pleistocene beach at Morston, north Norfolk, UK, obtained by the single‐aliquot regenerative‐dose protocol, indicate a Marine Isotope Stage (MIS) 7–6 transition date. The view that the beach is of Ipswichian (MIS 5e) age, held virtually unanimously for the last 75 years, may now be discarded. The extant beach sequence lies up to ∼5 m OD, yet global models suggest that MIS 7–6 sea levels were typically substantially below that of today. The explanation may lie with poorly understood regional tectonic movements. The MIS 7–6 date helps to constrain the ages of glacial deposits that bracket the beach sediments at Morston. The underlying Marly Drift till cannot be younger than MIS 8; this may also be true for the complex assemblage of glaciogenic landforms and sediments, including the Blakeney esker, in the adjacent lower Glaven valley. The well‐established Late Devensian (MIS 2) age of the Hunstanton Till is not compromised by the date of the Morston beach. There is no indication of a proposed Briton's Lane glaciation during MIS 6 times. Copyright © 2009 John Wiley & Sons, Ltd.

Year2009
JournalJournal of Quaternary Science
Journal citation24 (4), pp. 311 - 316
PublisherWiley-Blackwell
ISSN0267-8179
Digital Object Identifier (DOI)https://doi.org/10.1002/jqs.1267
Scopus EID2-s2.0-66249130410
Page range311 - 316
Research GroupSchool of Arts
Publisher's version
File Access Level
Controlled
Place of publicationUnited Kingdom
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