Cromer Forest Bed

Cromer Forest-bed Formation
Stratigraphic range: Early Middle Pleistocene 0.8–0.5 Ma
Cromer Forest-bed Formation exposed at the base of the West Runton Cliffs
TypeGeological formation
Unit ofDunwich Group
Sub-unitsSheringham Member, Runton Member, West Runton Member, and Bacton Member
UnderliesMiddle Pleistocene glacial deposits
OverliesWroxham Crag Formation or unconformity with Chalk Group
Thickness6-to-8-metre (20 to 26 ft)
Lithology
Primarysands and silts
Otherpeat, mud, silty marl
Location
Coordinates52°56′28″N 1°15′11″E / 52.941°N 1.253°E / 52.941; 1.253
Region Norfolk
Country England
Type section
Named forCromer
Named byClement Reid
LocationThe coast of North Norfolk from Weybourne to Happisburgh
Year defined1882
CountryEngland

The Cromer Forest-bed Formation, sometimes known as the Cromer Forest Bed, is a geological formation in Norfolk, England. It consists of river gravels, estuary and floodplain sediments predominantly silt, sand, and muds as well as peat along the coast of northern Norfolk.[1] It is the type locality for the Cromerian Stage of the Pleistocene between 0.8 and 0.5 million years ago.[2] The deposit itself range varies in age from about 0.8 to 0.5 million years ago. It is about 6-to-8-metre (20 to 26 ft) thick and is exposed in cliff section near the village of West Runton.

  1. ^ "Cromer Forest-bed Formation". The BGS Lexicon of Named Rock Units. British Geological Survey.
  2. ^ Ashton, Nick (2017). Early Humans. London: William Collins. p. 314. ISBN 978-0-00-815035-8.