The BGS Lexicon of Named Rock Units — Result Details

Meon Formation

Computer Code: MEON Preferred Map Code: notEntered
Status Code: Full
Age range: Early Pleistocene Epoch (QPE) — Holocene Epoch (QH)
Lithological Description: Floodplain alluvium and river terrace deposits. The floodplain alluvium comprises overbank deposits of brown organic silty clay and peaty clay, yogether with peat, overlying sand and gravel. The surviving river terrace deposits comprise sand and gravel, commonly cross-bedded, locally overlain by overbank deposits of clayey sandy silts and silty clays. These fine-grained deposits may be partly aeolian in origin. The major gravel lithology is flint, dominantly sub-rounded to sub-angular, some of it well rounded. The sand fraction is composed of well rounded quartz grains and subangular flint. The older, higher terraces are commonly cryoturbated.
Definition of Lower Boundary: Unconformable on Palaeogene bedrock.
Definition of Upper Boundary: Surface.
Thickness: To c.12m
Geographical Limits: The catchment of the River Meon and its tributaries, in the Fareham to East Meon area.
Parent Unit: Solent Catchments Subgroup (SNTCA)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  The valley of the River Meon and its tributaries in the Fareham to East Meon area. Hopson, 2000. 
Reference(s):
Hopson, P M. 2000. Geology of the Fareham and Portsmouth district - a brief explanation of the geological map. Sheet explanation of the British Geological Survey, 1:50 000 Sheet 316 Fareham and part of Sheet 331 Portsmouth (England and Wales). 
Farrant, A R. 2002. Geology of the Alreford district - a brief explanation of the geological map. Sheet explanation of the British Geological Survey. 1:50 000 sheet 300 Alresford [England and Wales]. 30pp. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E300 E315