The BGS Lexicon of Named Rock Units — Result Details

Barnwell Station Member

Computer Code: BSTA Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: Typically sand and flint gravel containing a wide range of mammal bones, molluscs and plants presumably preserved in more silty and clay-rich layers.
Definition of Lower Boundary: Unconformable on Gault mudstone or Chalk bedrock.
Definition of Upper Boundary: At surface
Thickness: About 2m adjacent to type locality, but elsewhere thickness of 4m or more are common. An anomalous thickness of about 7m was recorded at the south-east corner of South Paddock of Trinity College; this probably represents infill of a channel.
Geographical Limits: Restricted to local area adjacent to Barnwell Station, Cambridge, but could possibly be extended to include other areas mapped as 1st terrace of River Cam by British Geological Survey
Parent Unit: Cam Valley Formation (CAMV)
Previous Name(s): none recorded or not applicable
Alternative Name(s): Mapped As 1st Terrace Of River Cam By The British Geological Survey
Stratotypes:
Type Section  Former pit west of the railway and close to Barnwell Station,Cambridge Bell and Dickson,1971 
Reference(s):
Penning, W H and Jukes-Browne, A J, 1881. Geology of the neighbourhood of Cambridge. Memoir of the Geological Survey, Old Series Sheets 51SW and part 51NW (England and Wales). 
Bell, F G and Dickson, C A.1971.The Barnwell Station arctic flora: a reappraisal of some plant identifications. New Phytologist, 70, 627-638. 
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
Worssam, B C and Taylor, J H. 1969. The geology of the country around Cambridge. Memoir of the Geological Survey of Great Britain, Sheet 188 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E188