D. H. Keen

Queen Mary University of London

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G. Russell Coope

University of Birmingham

David R. Bridgland

Durham University

J. E. M. Robinson

North-West University

Kirsty Penkman

University of York

Robert L. Jones

The Ohio State University

Danielle C. Schreve

Royal Holloway University of London

Robert L. Jones

Northern Illinois University

D. Q. Bowen

Westmead Hospital

Michael H. Field

Leiden University

Richard C. Preece

University of Cambridge

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University of Cambridge

Royal Holloway University of London

University of Oxford

Centre National de la Recherche Scientifique

Natural History Museum

University College London

Quaternary Research Association

British Geological Survey

Durham University

University of Birmingham

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Pleistocene marine and periglacial deposits of the English Channel

Journal of Quaternary Science (2003)

Martin Bates D. H. Keen Jean‐Pierre Lautridou

Abstract The Pleistocene marine and associated periglacial deposits of the coasts of southern England from Cornwall to Sussex, the British Channel Islands, and northern France from Brittany and Normandy to the Pas de Calais are described. The deposition of almost all marine deposits is ascribed to temperate conditions, although large igneous erratic boulders may have been emplaced by shore‐ice rafting at the end or beginning of cold stages. The balance of the evidence from a variety of dating methods including U‐series dating, amino‐acid geochronology and biostratigraphy of associated terrestrial formations indicates that deposits of the last three pre‐Holocene temperate marine oxygen isotope stages (stages 9, 7 and substage 5e) can readily be identified along much of both coastlines of the Channel. Deposits attributable to stages 11 and 13 are uncommon and best seen in the staircase of marine terraces backing the Hampshire–Sussex coastal plain and perhaps in western Brittany and the Boulonnais. The height above modern sea‐level of the marine deposits is thought to be the result of slow uplift of the coastal zone caused by the isostatic response to sediment unloading during accelerated phases of erosion in cold stages, although deep‐seated tectonics also may have been partly responsible for uplift. However, the height above modern sea‐level of a deposit alone is not on its own an indicator of age. Periglacial head deposits are mainly exposed along the coasts, with the sections showing frost shattered debris moved downslope by cryoreptation (frost‐creep). The age of these deposits is uncertain, although they appear to be principally of marine oxygen isotope stages 4 and 2 in age. Some remnants of marine oxygen isotope stage 6 or 8 head deposits are present both in England and northern France. In a few places with good dating control, head deposits dating to the marine oxygen isotope stage 12 can be recognised. The age of the head deposits in most sections is based on their stratigraphical relationship with loess, palaeosols and on the dating of the underlying raised beaches. Copyright © 2003 John Wiley & Sons, Ltd.

Marine isotope stage

Geochronology

10.1002/jqs.747

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Citations (61)

Two long sedimentary records from Jersey, Channel Islands : Stratigraphie and pedological evidence for environmental change during the last 200 kyr [ Deux longues séquences sédimentaires de Jersey (Iles Anglo-Normandes) : Evidences stratigraphiques et pédologiques de changements environnementaux depuis 200 ka]

Quaternaire (1996)

D. H. Keen Brigitte Van Vliet‐Lanoë Jean Pierre Lautridou

L'étude des coupes littorales de Portelet et Belcroute situées sur la côte sud-ouest de Jersey, dans l'archipel anglo-normand, a permis de construire une séquence paléoenvironmentale détaillée remontant à la fin du Pléistocène moyen. La reconnaissance de 2 unités marines superposées permet de suggérer l'existence dans la Manche de 2 épisodes avec haut niveau marin: les stades 7 et 5. L'étude paléopédologique couplée à la micromorphologie a permis d'y reconnaître les fluctuations climatiques de la fin du stade S, vraisemblablement aux stades Sd à Sa. Une étude comparative avec la France occidentale et le sud de l'Angleterre est proposée.

10.3406/quate.1996.2053

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Citations (14)

Pleistocene cave sequences

Springer eBooks (1998)

S. Gordon Campbell D. H. Keen A. P. Currant S. N. Collcutt Anthony J. Stuart

Devonian

10.1007/978-94-011-4920-4_5

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Citations (1)

Marine CSEM Using a Bottom -Towed System to Explore Submarine Cold Vent Sites in Cascadia and New Zealand

Katrin Schwalenberg Carsten Scholl Eleanor C. Willoughby R. N. Edwards Marion Jegen

Seabed

Ocean bottom

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Late Pleistocene deposits and Mollusca from Portland, Dorset

Geological Magazine (1985)

D. H. Keen

Abstract The stratigraphy and fauna of terrestrial deposits at Portland Bill is described. The fauna is restricted to the head and is indicative of a cool climate rather than the temperate conditions suggested by earlier authors. An age in the Devensian Glacial Stage is tentatively suggested.

10.1017/s0016756800031095

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Citations (11)

Proceedings of the Geologists Association (1996)

D. H. Keen

10.1016/s0016-7878(96)80019-8

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The Upper Pleistocene deposits at Cassington, near Oxford, England

Journal of Quaternary Science (1998)

Darrel Maddy Simon G. Lewis R. Scaife D. Q. Bowen G. Russell Coope

For much of the Middle and all of the Upper Pleistocene the Upper Thames valley has remained outside the limit of ice advance. The main agents of landform evolution have been the River Thames and its tributaries, which have cut down episodically and in so doing have abandoned a series of river terraces. This study reports the findings of an investigation into exposures in the deposits underlying the Floodplain Terrace at Cassington, near Oxford, England. The sequence exposed reveals a stratigraphy of basal, predominantly fine-grained, lithofacies overlain by coarser gravel lithofacies. The fluvial architecture of these deposits indicates a major change in fluvial style from a low-energy (meandering) to a high energy (braided) channel system. The flora and fauna from the lower fine-grained lithofacies display a marked change from temperate at the base, to colder conditions towards the top, indicating a close association between deteriorating climate and changing fluvial depositional style. Amino acid and luminescence geochronology from the basal fine-grained lithofacies suggest correlation with Oxygen Isotope Stage 5 and hence it is argued that the major environmental change recorded at the site relates to the Oxygen Isotope Stage 5–4 transition. Deposition of much of the overlying gravel sequence probably occurred during Oxygen Isotope Stage 4, suggesting that the latter half of the Devensian may be less significant, in terms of fluvial landscape evolution in the Upper Thames valley, than was believed previously. © 1998 John Wiley & Sons, Ltd.

10.1002/(sici)1099-1417(199805/06)13:3<205::aid-jqs357>3.0.co;2-n

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Citations (71)

Middle Pleistocene molluscan and ostracod faunas from Allhallows, Kent, UK

Proceedings of the Geologists Association (2002)

Martin Bates D. H. Keen J. E. Whittaker J. S. Merry F.F. Wenban-Smith

Ostracod

10.1016/s0016-7878(02)80026-8

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Citations (15)

Middle Pleistocene raised beach anomalies in the English Channel: regional and global stratigraphic implications

Journal of Geodynamics (2000)