Computer Code: |
WCL |
Preferred Map Code: |
WwC |
Status Code: |
Full |
Age range: |
Oxfordian Age (JO)
— Oxfordian Age (JO) |
Lithological Description: |
Clay; grey, locally ooidal, slightly sandy, patchily fossilferous. |
Definition of Lower Boundary: |
Change from sandy clay and clayey fine-grained sand to commonly ooidal, generally sand-free clay. |
Definition of Upper Boundary: |
At the change to the dominantly limestone sequence of the Cucklington Oolite. |
Thickness: |
0 - 5m (3 - 4m in the type area); 2.7m in the East Stour Borehole - ST82SW/9. |
Geographical Limits: |
Across much of the Shaftesbury Sheet (313). |
Parent Unit: |
Stour Formation (STOU)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Reference Section |
East Stour Borehole ST82SW/9; 25.50 to 28.20m depth. |
Type Section |
Temporary section (Wright, 1981). 640m at 251 degrees from Fifehead Neville Church. |
Reference(s): |
Wright, J K, 1981. The Corallian rocks of north Dorset. Proceedings of the Geologists' Association, Vol.92, 17-32. |
Wright, J K, 1980. Oxfordian Correlation Chart. "In" Cope, C J W, (Editor). A correlation of Jurassic rocks in the British Isles, Part two: Middle and Upper Jurassic. Geological Society of London Special Report No.15. (p.61-76 in Correlation Chart). |
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
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