| Computer Code: |
PSH |
Preferred Map Code: |
PSh |
| Status Code: |
Full |
| Age range: |
Comley Series (EC)
— St David's Series (ED) |
| Lithological Description: |
Blocky to shaly red or maroon mudstone and siltstone at the base; green and grey fissile mudstones in the middle and red and green interbedded shaly mudstones at the top. |
| Definition of Lower Boundary: |
Sharp contact of red mudstone on grey, massive or bioturbated glauconitic sandstone of the Woodlands Member (Hartshill Formation). Some sediment mixing along junction. |
| Definition of Upper Boundary: |
Gradational passage upwards into Abbey Shales. Faunal definition not specified. |
| Thickness: |
200m in type area. |
| Geographical Limits: |
From Nuneaton, extending northwestwards to the southern suburbs of Atherstone (SP 3629 9197 - 3064 9712). |
| Parent Unit: |
Stockingford Shale Group (SSH)
|
| Previous Name(s): |
Purley Shales [Obsolete Name and Code: Use PSH]
(-1129)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
Partial type section in upper part of formation. Purley Park Lane. |
| Type Area |
The area extending from the southwest face of Hartshill Quarry to the Woodlands Quarry (SSSI) and including the northeastern part of Hartshill village. |
| Reference(s): |
| Lapworth, C, Watts, W W and Harrison, W J, 1898. Sketch of the geology of the Birmingham district. Proceedings of the Geologists' Association of London, Vol.15, p.313-389. |
| 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: |
|
E155
|
