The BGS Lexicon of Named Rock Units — Result Details

Pebble Gravel Formation [Obsolete Name And Code: See NBED And STGR]

Computer Code: PBGR Preferred Map Code: notEntered
Status Code: Index Level
Age range: Early Pleistocene Epoch (QPE) — Early Pleistocene Epoch (QPE)
Lithological Description: Gravel, pebble-grade (4-64mm) with subordinate sand and local silt or clay lenses; bedded or chaotic. [Generic description].
Definition of Lower Boundary: Rests on pre-Quaternary bedrock.
Definition of Upper Boundary: Generally at surface.
Thickness: none recorded or not applicable
Geographical Limits: None given.
Parent Unit: Not Applicable (-)
Previous Name(s): Pebble Gravel (-442)
Alternative Name(s): none recorded or not applicable
none recorded or not applicable
Gibbard, P L. 1999. The Thames Valley, its tributaries and their former courses. 45-58 in Bowen, D Q (Editor), A revised correlation of Quaternary deposits in the British Isles. [London: The Geological Society.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used: