| Computer Code: |
WIS |
Preferred Map Code: |
WiS |
| Status Code: |
Index Level |
| Age range: |
Langsettian Substage (CA)
— Langsettian Substage (CA) |
| Lithological Description: |
A medium to thickly bedded, grey fine-to coarse-grained, cross-bedded sandstone. |
| Definition of Lower Boundary: |
A sharp upward change in a conformable succession from a predominantly grey mudstone to sandstone. The base of the first sandstone bed above the Subcrenatum Marine Band (where present) or the coarse-grained, Laverton Sandstone. |
| Definition of Upper Boundary: |
A sharp upward change in a conformable succession from sandstone, to predominantly mudstone. The top of the last sandstone bed below the Nook House Sandstone. |
| Thickness: |
From 8 m to 30 m thick. |
| Geographical Limits: |
The Pennine foothills between Masham and Winksley, North Yorkshire. |
| 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 |
Disconnected sections on the banks of the River Laver at Winksley, Banks Wood, Winksley, near Ripon, North Yorkshire; neither top nor bottom seen. Wilson and Thompson, 1965. |
| Reference Section |
Sporadic exposures around Nook House, 4 km north-west of Kirkby Malzeard, North Yorkshire; neither top nor bottom seen. Wilson and Thompson, 1965 |
| Reference(s): |
| Wilson, A A and Thompson, A T. 1965. The Carboniferous section in the Kirkby Malzeard area, Yorkshire. Proceedings of the Yorkshire Geological Society. Vol 35, 203-227. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E051
|
