The BGS Lexicon of Named Rock Units — Result Details

Dry valley deposits

Computer Code: DVY Preferred Map Code: notEntered
Status Code: Full
Age range: Quaternary Period (Q) — Quaternary Period (Q)
Lithological Description: Dry valley deposits are superficial deposits derived dominantly by solifluction processes in valleys cut into porous rocks, particularly limestones. Deposits may have a fluvially derived component. Normally soft to firm consolidated, compressible silty clay, but may contain layers of silt, sand, peat and a basal gravel. A stronger, desiccated surface zone may be present.
Definition of Lower Boundary: none recorded or not applicable
Definition of Upper Boundary: none recorded or not applicable
Thickness: none recorded or not applicable
Geographical Limits: none recorded or not applicable
Parent Unit: Mass movement deposits (MASMD)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
McMillan, A A and Powell, J H. 1999. The classification of artificial (man made) ground and natural superficial deposits. British Geological Survey Research Report, RR/99/04. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable