| 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. 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. 1990. Geology of the West Stour - Cucklington district. British Geological Survey Technical Report WA/90/48. |
| Wright, J K, 1985. A new exposure of the Corallian Beds in north Dorset. Dorset Proceedings, Vol.106, p.168. (for 1984,). |
| Arkell, W J. 1933. The Jurassic System in Great Britain (Oxford: Clarendon Press.) |
| 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. |
| 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
|
