| Computer Code: |
WCR |
Preferred Map Code: |
WCr |
| Status Code: |
Index Level |
| Age range: |
Chokierian Substage (CH)
— Alportian Substage (CO) |
| Lithological Description: |
[Obsolete: use ACHS]
Sandstone, medium to coarse-grained, cross-bedded; seatearth at top. |
| Definition of Lower Boundary: |
Abrupt change from siltstones of Crossdale Mudstone to sandstone. |
| Definition of Upper Boundary: |
Top of seatearth sandstone; dark grey mudsone of the Dolphinholme Mudstone above. |
| Thickness: |
35m-60m. |
| Geographical Limits: |
Ellel and Forton, Lancashire. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
50m north of Wellington Crag Farm. |
| Reference(s): |
| Aitkenhead, N, Bridge, D M, Riley, N J, and Kimbell, S F. 1992. Geology of the country around Garstang. Memoir of the British Geological Survey, Sheet 67 (England and Wales) |
| Wilson, A A, Brandon, A and Johnson, E W, 1989. Abbeystead: Geological context of the Wyresdale Tunnel methane explosion. Technical Report of the British Geological Survey WA/89/30. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E067
E059
|
