The BGS Lexicon of Named Rock Units — Result Details

Spargrove Limestone Member

Computer Code: SPLI Preferred Map Code: notEntered
Status Code: Full
Age range: Pliensbachian Age (JE) — Pliensbachian Age (JE)
Lithological Description: Interbedded muddy limestones and thin silty mudstones.
Definition of Lower Boundary: Upward change from thick mudstone sequence to a dominantly limestone sequence.
Definition of Upper Boundary: Upward change from a dominantly limestone sequence to silty and fine-grained sandy clays.
Thickness: 0-2.5m
Geographical Limits: From just southwest of Ditcheat [ST 620 361] in an arc northeastward through Spargrove to just north of Stoney Stratton (limit of current mapping on 1:50 000 sheets 296 and 297).
Parent Unit: Charmouth Mudstone Formation (CHAM)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Small exposures around the hamlet of Spargrove, Somerset, 2km ESE of Evercreech. 
Reference(s):
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:
E296 E297