| Computer Code: |
HSM |
Preferred Map Code: |
HSM |
| Status Code: |
Full |
| Age range: |
Oxfordian Age (JO)
— Oxfordian Age (JO) |
| Lithological Description: |
Clay, grey, commonly oolitic. |
| Definition of Lower Boundary: |
Fairly abrupt change from the oolitic shelly limestones of the Cucklington Oolite. |
| Definition of Upper Boundary: |
Fairly abrupt change to the pisolitic limestones of the Sturminster Pisolite. |
| Thickness: |
0 - 5.5m |
| Geographical Limits: |
Across the central part of the Shaftesbury Sheet (313) - from Fifehead Street, Quintin (ST 772 102) - Marnhull (ST 783 189). |
| Parent Unit: |
Stour Formation (STOU)
|
| Previous Name(s): |
Nothe Clay [Obsolete Name and Code: Use HSM]
(-326)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Best developed around the village of Hinton St Mary, Dorset. |
| Reference(s): |
| Wright, J K, 1981. The Corallian rocks of north Dorset. Proceedings of the Geologists' Association, Vol.92, 17-32. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E313
|
