The BGS Lexicon of Named Rock Units — Result Details

Oulton Clay Member

Computer Code: OULT Preferred Map Code: notEntered
Status Code: Full
Age range: Anglian Stage (QA) — Anglian Stage (QA)
Lithological Description: Composed of horizontally laminated pale grey sandy silts and grey clays with sporadic isolated pale grey sand lenses.
Definition of Lower Boundary: The basal contact of the Oulton Clay Member with the underlying Lowestoft Till Member is sharp, and represented by an abrupt transition from clay-rich till, to laminated silts and clays.
Definition of Upper Boundary: The upper contact of the Oulton Clay Member with the overlying Pleasure Gardens Till Member is diffuse and represented by the interdigitation of beds of silt and clay with lenses of chalky till.
Thickness: Maximum thickness of 2.2m observed at stratotype.
Geographical Limits: Cliff sections between Corton Woods, Corton, north Norfolk. The deposit has been traced westwards inland in a series of shallow boreholes for some 400m.
Parent Unit: Lowestoft Formation (LOFT)
Previous Name(s): Oulton Beds (-4238)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Cliff sections sited some 200m north of the beach access south of the village of Corton, north Norfolk. Sections at this locality show up to 2.2m of laminated silts and clays (Oulton Clay Member) resting upon the upper surface of the Lowestoft Till Member. The Oulton Clay Member is, in turn, overlain by the Pleasure Gardens Till Member and Corton Woods Sand and Gravel Member. Banham. 1971. 
Reference(s):
Arthurton, R S, Booth, S J, Morigi, A N, Abbott, M A W and Wood, C J. 1994. Geology of the country around Great Yarmouth, Sheet Memoir 162, British Geological Survey. [London: HMSO.] 138pp 
Banham, P H. 1971. Pleistocene beds at Corton, Suffolk. Geological Magazine, Vol.108, 281-285. 
Pointon, K W. 1978. The Pleistocene succession at Corton, Suffolk. Bulletin of the Geological Society of Norfolk, Vol.30, 55-76. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E176