| Computer Code: |
SSH |
Preferred Map Code: |
SSh |
| Status Code: |
Full |
| Age range: |
Comley Series (EC)
— Tremadoc Series (O1) |
| Lithological Description: |
Pale to medium grey or dark grey to black micaceous mudstone, locally calcareous and pyritic, with silty or organic laminae and bands. Burrowed and bioturbated intervals. Some intercalated grey quartzose sandstone beds. |
| Definition of Lower Boundary: |
Sharp contact of mudstone on massive grey, glauconitic sandstone of the Woodlands Member (Hartshill Sandstone Formation). Some sediment mixing and flame structures at junction. |
| Definition of Upper Boundary: |
Hard, grey, commonly fractured mudstone overlain with unconformity by beds that may comprise: Devonian sandstone or conglomerate, Carboniferous mudstone, sandstone and Triassic breccia or mudstone. |
| Thickness: |
775m in type area (maximum aggregate of partial type sections). |
| Geographical Limits: |
Extends from Bedworth, northwestwards to just northeast of Woodlands Farm (SP 3688 8633 - 2849 9870). |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
Stockingford Shales [Obsolete Name and Code: Use SSH]
(-4900)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Merevale No.3 Borehole (SP39NW/7) 10ft 0ins-819ft 0ins |
| Reference Section |
Merevale No.2 Borehole (SP39NW/6)701ft 0ins-846ft 6ins. |
| Reference Section |
Merevale No.1 Borehole (SP29NE/16) 105ft 0ins-714ft 0ins. |
| Type Area |
Area extending from Hartshill northwestward to Atherstone. |
| Reference(s): |
| Lapworth, C, 1882. On the discovery of Cambrian rocks in the neighbourhood of Birmingham. Geological Magazine, (2), Vol.9, p.563-565. |
| Baldock, J W. 1991. Geology of the Hartshill and Stockingford districts, Nuneaton. British Geological Survey Technical Report, WA/91/60. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E169
E141
|
