The BGS Lexicon of Named Rock Units — Result Details

Newton Clay Member

Computer Code: NEC Preferred Map Code: NeC
Status Code: Full
Age range: Oxfordian Age (JO) — Oxfordian Age (JO)
Lithological Description: Clay, oolitic; thin limestone beds or concretions. In the southern part of the outcrop, sand is only a minor component; in the north, sandy clay is common, and beds of fine-grained sand occur.
Definition of Lower Boundary: Rests with a sharp junction on the Sturminster Pisolite.
Definition of Upper Boundary: Passes up into micritic oolitic limestones of the Todber Freestone.
Thickness: 0 - 15m: (12.24m in the East Stour Borehole - ST82SW/9; 6.7m at the type locality; 3.65m in the Sturminster railway cutting).
Geographical Limits: Across the whole of the Shaftesbury Sheet (313) and the southern part of the Wincanton Sheet (297).
Parent Unit: Stour Formation (STOU)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Road section on the south side of the A357, 250m at 250 degrees from Newton Bridge. 
Reference Section  East Stour Borehole (ST82SW/9) from 9.25 - 21.49m depth. 
Reference Section  Hazelbury Bryan Borehole (ST70NE/3) from 6.1 - 13.1m depth. 
Reference(s):
Bristow, C R, 1990. Geology of the West Stour - Cucklington district. British Geological Survey Technical Report WA/90/48. 
Bristow, C R, 1989. Geology of Sheets 71NE and 71SE. (Marnhull-Sturminster Newton, Dorset) Part of 1:10,000 Sheet 313 (Shaftesbury). British Geological Survey Technical Report WA/89/59. 
Bristow, C R, 1989. Geology of the East Stour - Shaftesbury district (Dorset) British Geological Survey Technical Report WA/89/58. 
Bristow, C R, Cox, B M, Woods, M A, Prudden, H C, Sole, D, Edmunds, M and Callomon, J H, 1992. The geology of the A303 trunk road between Wincanton, Somerset and Mere, Wiltshire. Proceedings of the Dorset Natural History and Archaeological Society, Vol.113, 139-143. 
Arkell W J, 1933. The Jurassic System in Great Britain [Oxford: Clarendon Press.] 
Wright, J K, 1985. A new exposure of the Corallian Beds in north Dorset. Dorset Proceedings, Vol.106, p.168. (for 1984,). 
Freshney, E C. 1989. Geology of Sheets ST70NW and ST70NE. (Hazelbury Bryan-Mappowder district, Dorset). British Geological Survey Technical Report WA/90/51. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E313 E297 E281