| Computer Code: |
LWS |
Preferred Map Code: |
LwS |
| Status Code: |
Full |
| Age range: |
Cautleyan Stage (OU)
— Cautleyan Stage (OU) |
| Lithological Description: |
Greenish grey, weakly bedded, coarse- and medium-grained volcaniclastic sandstone with subordinate conglomerate, siltstone and mudstone, and with a bed at the top of well sorted, white weathered feldspathic sandstone with sporadic shell detritus.
Ashgill (Cautleyan). |
| Definition of Lower Boundary: |
Taken at the base of the heterogeneous clastic sedimentary succession, unconformably overlying Borrowdale Volcanic Group rocks. |
| Definition of Upper Boundary: |
Taken at the abrupt, apparently conformable change to limestone at the base of the Kirkley Bank Limestone Formation. |
| Thickness: |
Up to about 160 m. |
| Geographical Limits: |
Waterblean to south of Beck Wood [SD 177 824 to 158 806], south-west Lake District. |
| Parent Unit: |
Stile End Formation (SEN)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
The type section is in Low Scales Beck [SD 1618 8141 to SD 1625 8129]. |
| Reference(s): |
| Johnson, E W, Soper, N J, Burgess, I C, Ball, D F, Beddoe-Stephens, B, Carruthers, R M, Fortey, N J, Hirons, S, Merritt, J W, Millward, D, Roberts, B, Walker, A B and Young, B. 2001. Geology of the country around Ulverston. Memoir of the British Geological Survey, England and Wales, Sheet 48. |
| Millward, D, and Stone, P. 2012. Stratigraphical framework for the Ordovician and Silurian sedimentary strata of northern England and the Isle of Man. British Geological Survey Research Report, RR/12/04. 119pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E048
|
