The BGS Lexicon of Named Rock Units — Result Details

Medway Valley Formation

Computer Code: MEVA Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Holocene Epoch (QH)
Lithological Description: River Terrace deposits comprising sand and gravel, characterised by clasts of Wealden sandstone, siltstone and sporadic flints, and Alluvium comprising silt, sand and gravel.
Definition of Lower Boundary: Overlies bedrock.
Definition of Upper Boundary: At surface, or locally overlain by head and brickearth.
Thickness: Not specified.
Geographical Limits: Valley of the River Medway and its tributaries from Tunbridge Wells to Sheerness, north Kent.
Parent Unit: Thames Catchments Subgroup (THCAT)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Valley of the River Medway from Tunbridge Wells to Sheerness. Gibbard, 56-57 in Bowen, 1999. 
Reference(s):
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.] 
Bristow, C R and Bazley, R A. 1972. Geology of the country around Royal Tunbridge Wells. Memoir of the Geological Survey of Great Britain, sheet 303 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E272 E288 E303