The BGS Lexicon of Named Rock Units — Result Details

Southacre Clay And Lignite Member

Computer Code: SO Preferred Map Code: notEntered
Status Code: Full
Age range: Oligocene Epoch (GO) — Oligocene Epoch (GO)
Lithological Description: Lignites and brown and black carbonaceous clays, with subordinate grey to greyish brown silty clays and rare sands.
Definition of Lower Boundary: Conformable upon the Abbrook Clay and Sand Member, from which lignites and brown carbonaceous clays are absent.
Definition of Upper Boundary: Passes upwards into the undifferentiated upper parts of the Bovey Formation, marked by the absence of lignite beds and a considerable increase in fine sand and stiff, silty clay beds.
Thickness: 30 to 67m
Geographical Limits: Bovey Basin, Devon.
Parent Unit: Bovey Formation (BOF)
Previous Name(s): Southacre Clay And Lignite (-4892)
Southacre Clay-And-Lignite Member (-4893)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  The Southacre area of the Bovey Basin, Devon. Selwood et al., 1984. 
Type Area  Exposed in unnamed working clay pits between New Bridge Claypit and Pinsent Claypit, where the sequence is exposed from time to time. Access is limited, and strictly by appointment with the operators. Sections rapidly degrade due to the oxidation of lignite.Selwood et al., 1984. 
Reference(s):
Selwood, E B, Edwards, R A, Simpson, S, Chesher, J A, Hamblin, R J O, Henson, M R, Riddolls, B W and Waters, R A. 1984. Geology of the countryside around Newton Abbot. Memoir of the British Geological Survey, Sheet 339 (England and Wales). 
Edwards, R A. 1970. The geology of the Bovey Basin. Unpublished PhD thesis, University of Exeter. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E339