The BGS Lexicon of Named Rock Units — Result Details
Ditcheat Clay Member
Computer Code: | DICL | Preferred Map Code: | notEntered |
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Status Code: | Full | ||
Age range: | Pliensbachian Age (JE) — Pliensbachian Age (JE) | ||
Lithological Description: | Silty clays and silts | ||
Definition of Lower Boundary: | Upward change from dominantly limestone succession of Spargrove Limestone or, where absent, from the dark grey mudstones of the Pylle Clay. | ||
Definition of Upper Boundary: | Somewhat transitional, but marked by upward passage into fine-grained sandy clays of the Pennard Sand Member. | ||
Thickness: | 40-60m | ||
Geographical Limits: | From Wraxhall [ST 600 365] in west (limit of current mapping) in an arc north-eastwards through Milton Clevedon to north of Stoney Stratton. | ||
Parent Unit: | Charmouth Mudstone Formation (CHAM) | ||
Previous Name(s): | Belemnitiferous and Micaceous Marls (upper part) [Obsolete Name and Code: Use DICL]
(-3993)
Lower Lias Marls (upper part) [Obsolete Name and Code: Use DICL] (-3994) |
||
Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Around the village of Ditcheat, Somerset | ||
Reference(s): | |||
Wilson, V, Welch, F B A, Robbie, J A, and Green, G W. 1958. Geology of the country around Bridport and Yeovil. Memoir of the Geological Survey of Great Britain, Sheets 327 and 312 (England and Wales). | |||
Kellaway, G A and Wilson, V. 1941. An outline of the geology of Yeovil, Sherborne and Sparkford Vale. Proceedings of the Geologists' Association, Vol.52, 131-174. | |||
Bristow, C R, and Westhead R K. 1993. Geology of the Evercreech-Batcombe area (Somerset). British Geological Survey Technical Report WA/93/89. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
none recorded or not applicable |