The BGS Lexicon of Named Rock Units — Result Details

Petrockstow River Terrace Deposits, 4 Member

Computer Code: PET4 Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: Predominantly clay with gravel seams.
Definition of Lower Boundary: Unconformable on bedrock of palaeogene and Late Carboniferous age.
Definition of Upper Boundary: Surface.
Thickness: Unknown probably less than 5m.
Geographical Limits: The Petrockstow Basin, Devon.
Parent Unit: Petrockstow Valley Formation (PETRO)
Previous Name(s): River Terrace Deposits, 4 (Petrockstow) (-1118)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Petrockstow Basin valley. Freshney et al 1979. 
Reference(s):
Freshney, E C, Beer, K E and Wright, J E. 1979. Geology of the country around Chumleigh. Memoir of the Geological Survey of Great Britain, Sheet 309 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E309