| Computer Code: |
BSF |
Preferred Map Code: |
BSF |
| Status Code: |
Full |
| Age range: |
Sheinwoodian Age (SS)
— Sheinwoodian Age (SS) |
| Lithological Description: |
Mudstone, bedding-fissile, medium-dark grey, variously bioturbated, graptolitic. Sparse thin argillaceous limestone layers with shelly faunas. |
| Definition of Lower Boundary: |
Not seen in type area but presumed to rest conformably on Llandovery Purple Shales. |
| Definition of Upper Boundary: |
Overlain conformably (by rapid passage) by Aston Mudstone Formation. Unnamed dingle (SO 3038 9094). |
| Thickness: |
May be 500m |
| Geographical Limits: |
Southern and western surround of the Shelve Ordovician outcrops, ie the Camlad Valley. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
Bromleysmill Shales Formation [Obsolete Name and Code: Use BSF]
(-4503)
|
| Alternative Name(s): |
Coalbrookdale Formation
|
| Stratotypes: |
| Reference Section |
Quarry and stream 300m south of road junction A488 and A489, (SO 332 917) at Bromleysmill. |
| Type Section |
Quarry and stream 300m south of road junction A488 and A489, [SO 332 917] at Bromleysmill. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E165
|
