| Computer Code: |
ASGP |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Actonian Substage (OT)
— Actonian Substage (OT) |
| Lithological Description: |
Grey rubbly micaceous silty mudstones with siltstone bands, in places orange-stained and weathering shaly. |
| Definition of Lower Boundary: |
Drawn at the base of the Acton Scott Formation where mudstone facies rest conformably on blocky and rubbly mudstones and siltstones of the Cheney Longville Flags. |
| Definition of Upper Boundary: |
Drawn at the conformable upward passage of the Acton Scott Formation where the division from the overlying Onny Shales has been based on palaeontological grounds because of difficulty differentiating. |
| Thickness: |
c. 60 m near Church Stretton to c. 150 m in the Caradoc (south) area. |
| Geographical Limits: |
Caradoc - Wrekin District, Shropshire. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
Acton Scott Group [Obsolete Name and Code: Use ASGP]
(-30)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
River Onny Valley, Shropshire. |
| Reference(s): |
| Cobbold, E S. 1900. The Geology of the Church Stretton District, in Church Stretton, 1, Shrewsbury, 47. |
| Pocock, R W and Whitehead, T H, 1948. British Regional Geology: The Welsh Borderland. 2nd Ed, p.51, British Geological Survey. |
| Greig D C, Wright, J E, Hains, B A, and Mitchell, G H. 1968. Geology of the country around Church Stretton, Craven Arms, Wenlock Edge and Brown Clee. Memoir of the Geological Survey, Sheet 166 (England and Wales). (London: HMSO.) 379pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
