| Computer Code: |
HEMS |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Bolsovian Substage (CC)
— Bolsovian Substage (CC) |
| Lithological Description: |
Grey mudstones, siltstones and sandstones with thin coals. |
| Definition of Lower Boundary: |
Base of Fourth Cherry Tree Marker (mudstones with bivalves and euestheriids). |
| Definition of Upper Boundary: |
Base of First Cherry Tree Marker (mudstones with bivalves). |
| Thickness: |
c.90m |
| Geographical Limits: |
Yorkshire Coalfield. |
| Parent Unit: |
Pennine Upper Coal Measures Formation (PUCM)
|
| Previous Name(s): |
Hemsworth Division
(-955)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Cherry Tree Borehole (near South Elmsall, Yorkshire). SE41SE/9. Depths of member 16.61-105.38m (samples RG 4241-4455 from 50' to 1946'). |
| Reference(s): |
| Goossens, R F, and Smith, E G. 1973. The stratigraphy and structure of the Upper Coal Measures in the exposed Yorkshire Coalfield between Pontefract and South Kirkby. Proceedings of the Yorkshire Geological Society, Vol. 39, 487-514. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
