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The Pleistocene College Farm Silty Clay at Great Blakenham, Suffolk, England – additional information on the course of the early River Thames

Published online by Cambridge University Press:  01 April 2016

B.S.P. Moorlock ,
J.B. Riding ,
R.J.O. Hamblin ,
P. Allen  and
J. Rose
B.S.P. Moorlock*
Affiliation:
British Geological Survey, Keyworth, Nottinghamshire, NG12 5GG, U.K.
J.B. Riding
Affiliation:
British Geological Survey, Keyworth, Nottinghamshire, NG12 5GG, U.K.
R.J.O. Hamblin
Affiliation:
British Geological Survey, Keyworth, Nottinghamshire, NG12 5GG, U.K. Department of Geography, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, U.K.
P. Allen
Affiliation:
Department of Geography, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, U.K. 13 Churchgate, Waltham Cross, Cheshunt, Herts, EN8 9NB, U.K.
J. Rose
Affiliation:
Department of Geography, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, U.K.
*
Corresponding author Dr. B. Moorlock; email:[email protected]

Abstract

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The Pleistocene College Farm Silty Clay Member of the Creeting Formation at Great Blakenham, Suffolk, south-east England is shown to contain indigenous and recycled dinoflagellate cysts and other derived palynomorphs. The indigenous dinoflagellate cysts indicate a marine influence during deposition of the clay, whilst the other palynomorphs demonstrate derivation of sediment from a wide catchment of Carboniferous, Jurassic and Cretaceous bedrocks. It is argued, by comparison with palynological data from the Chillesford Clay Member of the Norwich Crag Formation some 25km to the east, that these sediments were eroded from western, south-central and south-eastern Britain, and transported by the early River Thames to its estuary, where they were redeposited at the western margin of the Crag Basin, during the Early Pleistocene Tiglian TC3 Substage. This interpretation refines earlier research which concluded the College Farm Silty Clay was deposited in a predominantly freshwater environment, such as a lagoon, without any direct access to the sea or major river.

Keywords

EnglandSuffolkPleistoceneCragThames
Type
Regular Papers
Information
Netherlands Journal of Geosciences , Volume 81 , Issue 1 , March 2002 , pp. 9 - 17
Copyright
Copyright © Stichting Netherlands Journal of Geosciences 2002

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