The BGS Lexicon of Named Rock Units — Result Details

Allenton Sand And Gravel

Computer Code: ALSG Preferred Map Code: symb
Status Code: Index Level
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Sand and gravel with minor clay and silt lenses, commonly including deposits of head, both capping the terrace deposits and involuted with them.
Definition of Lower Boundary: The bedrock surface - commonly cryogenically involuted; other deposits may intervene.
Definition of Upper Boundary: Top of sand and gravel, commonly corresponding to terrace surface; commonly overlain by head that is involuted with sand and gravel to varying degrees.
Thickness: Typically to 4m
Geographical Limits: Derwent Valley.
Parent Unit: Not Entered (?)
Previous Name(s): Beeston Terrace (-2562)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Brandon, A, 1996. Geology of the Lower Derwent Valley: 1:10 000 Sheets SK33SE, SK43SW and SK43SE. British Geological Survey Technical Report WA/96/07. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable