| Computer Code: |
SCBR |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Tournaisian Age (CT)
— Visean Age (CV) |
| Lithological Description: |
Green to grey, medium- to coarse-grained pebbly argillaceous sandstones with subordinate calcareous mudstones and layers of white, nodular, micritic limestone. The Member contains marine fossils (brachiopods and algae). |
| Definition of Lower Boundary: |
At the top of a medium- to coarse-grained pebbly sandstone, overlain by green, slickensided, smectite-rich mudstone with about 4mm ferruginous concretions of the Arch Farm Sandstone Formation, sharply overlain by pale grey to white calcareous sandstone of the Scot's Brook Member. |
| Definition of Upper Boundary: |
Sharply overlain by grey, nodular limestone of the Cloud Hill Dolostone Formation ('Carboniferous Limestone'). |
| Thickness: |
3.5m in the Ticknall Borehole. |
| Geographical Limits: |
Not identified at the surface. |
| Parent Unit: |
Cloud Hill Dolostone Formation (CLHD)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
British Geological Survey Ticknall Borehole SK32SE/103, between 92.3m and 88.8m depth. |
| Reference(s): |
| Ambrose, K, and Carney, J N. 1997. Geology of the Calke Abbey area: 1:10 000 Sheet SK32SE. BGS Technical Report WA/97/17. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
