Toggle Main Menu Toggle Search

Open Access padlockePrints

A late Middle Pleistocene temperate-periglacial-temperate sequence (Oxygen Isotope Stages 7-5e) near Marsworth, Buckinghamshire, UK

Lookup NU author(s): Dr Andrew Baker


Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


River-channel and colluvial deposits, near Marsworth, Buckinghamshire, record a temperate-periglacial-temperate sequence during the late Middle Pleistocene. The deposits of a lower channel contain tufa clasts bearing leaf impressions that include Acer sp., and Sorbus aucuparia and containing temperate arboreal pollen attributed to ash-dominated woodland. The tufa probably formed at the mouth of a limestone spring before being redeposited in a small river whose deposits contain plant remains, Mollusca, Coleoptera, Ostracoda and vertebrate bones of temperate affinities. The sediments, sedimentary structures and limited biological remains above the Lower Channel deposits indicate that fluvial deposition preceded climatic cooling into periglacial conditions. Fluvial deposition recurred during a later temperate episode, as shown by the mammalian bone assemblage in stratigraphically higher channel deposits. The Upper Channel deposits are confidently attributed to Oxygen Isotope Sub-stage 5e (Ipswichian) on the basis of their vertebrate remains. However, the age of the Lower Channel deposits is less clear. The mammalian and coleopteran remains in the Lower Channel strongly suggest correlation with oxygen isotope stage 7 on the basis of their similarities to other sites whose stratigraphy is better known and the clear difference of the Lower Channel assemblage from well-established faunas of Ipswichian or any other age. By contrast, U-Th dating of the tufa clasts suggests an age post 160 ka BP, while Aile/Ile ratios on Mollusca point to an Ipswichian age and younger. Four ways of interpreting this age discrepancy are considered, the preferred one correlating the Lower Channel deposits with Oxygen Isotope Stage 7. © 2001 Elsevier Science Ltd. All rights reserved.

Publication metadata

Author(s): Murton JB, Baker A, Bowen DQ, Caseldine CJ, Coope GR, Currant AP, Evans JG, Field MH, Green CP, Hatton J, Ito M, Jones RL, Keen DH, Kerney MP, McEwan R, McGregor DFM, Parish D, Robinson JE, Schreve DC, Smart PL

Publication type: Article

Publication status: Published

Journal: Quaternary Science Reviews

Year: 2001

Volume: 20

Issue: 18

Pages: 1787-1825

ISSN (print): 0277-3791

ISSN (electronic): 1873-457X

Publisher: Pergamon


DOI: 10.1016/S0277-3791(01)00004-X


Altmetrics provided by Altmetric