| Computer Code: |
TKS |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Langsettian Substage (CA)
— Langsettian Substage (CA) |
| Lithological Description: |
The Thick Stone is generally a fine-grained sandstone, split in places into two leaves. It lies between the Black Bed Coal and the Better Bed Band Coal but in some sections coalesces with a sandstone above the Better Bed, cutting out the Better Bed Band. |
| Definition of Lower Boundary: |
none recorded or not applicable
|
| Definition of Upper Boundary: |
none recorded or not applicable
|
| Thickness: |
To c.15m |
| Geographical Limits: |
West Yorkshire area. |
| Parent Unit: |
Pennine Lower Coal Measures Formation (PLCM)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E077
E078
|
