| Computer Code: |
RYSA |
Preferred Map Code: |
Ry |
| Status Code: |
Index Level |
| Age range: |
Langsettian Substage (CA)
— Langsettian Substage (CA) |
| Lithological Description: |
A medium-bedded, very fine- to mediium-grained, trough cross-bedded and part ripple cross-laminated, micaceous, buff to pale brown sandstone. |
| Definition of Lower Boundary: |
Sharp upward change in a conformable succession from predominately grey mudstone/siltstone to sandstone - base of first sandstone above the Arley Coal. |
| Definition of Upper Boundary: |
Sharp upward change in a conformable succession from sandstone to predominantly grey mudstone - top of last sandstone bed below the New Coal (South Lancashire). |
| Thickness: |
0-18m |
| Geographical Limits: |
Between Royton [SD 9150 0750] and Lees [SD 9550 0450] near Oldham, Lancashire. |
| 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: |
| Reference Section |
Elly Clough Quarry, Royley, Royton, Lancashire; 10m visible, base and top not seen. Crofts, R G et al, in press. |
| Reference Section |
Hanging Bank Colliery Shaft, SD 90 NW/33, Oldham, Lancashire. Full thickness recorded between 6.7 and 24.1m below ground level. Crofts, R G et al, in press. |
| Reference(s): |
| Crofts, R G, Hough, E and Humpage, A J. In press. Geology of the Manchester district. British Geological Survey, Sheet Explanation. 1:50 000 Sheet 85 Manchester (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E085
|
