The BGS Lexicon of Named Rock Units — Result Details

Shapwick Member [Obsolete Name And Code: Use BDNS]

Computer Code: SHWK Preferred Map Code: Shap
Status Code: Index Level
Age range: Albian Age (KA) — Albian Age (KA)
Lithological Description: Calcareous sandstones and calcarenites with several chert horizons in the lower part; glauconitic at most levels.
Definition of Lower Boundary: Top of mineralised surface (Whitecliff Hardground).
Definition of Upper Boundary: Erosion surface at base of Cenomanian Limestone.
Thickness: c.6m.
Geographical Limits: Devon and West Dorset. Recorded on Sheets 326 (Sidmouth), 327 (Bridport) and 311 Wellington). Now considered obsolete, being a redundnat synonym of the Bindon Sandstone Member.
Parent Unit: Upper Greensand Formation (UGS)
Previous Name(s): Chert Beds (*642)
Alternative Name(s): Bindon Sandstone Member
Stratotypes:
Reference Section  Beer Head, Beer, Devon. 
Reference Section  Whitecliff, Seaton, Devon. 
Type Section  Shapwick Quarry, Uplyme, Devon. 
Reference(s):
Jukes-Browne, A J and Hill, W. 1900. The Cretaceous Rocks of Britain. 1. Gault and Upper Greensand. Memoir of the Geological Survey of Great Britain. 
Edwards, R A, Gallois, R W and Hamblin, R J O. 2004. Geology of the Sidmouth district. Sheet Explanation of the British Geological Survey, Sheets 326 and 340 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable