| Computer Code: |
BKCG |
Preferred Map Code: |
BkCg |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Locally brecciated andesite lavas, with thin intercalations of lapilli-tuff and volcaniclastic sandstone. |
| Definition of Lower Boundary: |
Taken at the base of the autobrecciated andesite overlying a few metres of sandstone of the Esk Pike Sandstone Formation. In some poorly exposed areas it may overlie silicic lapilli-tuff of the Lincomb Tarns Tuff Formation. |
| Definition of Upper Boundary: |
Not seen. |
| Thickness: |
To at least 290m |
| Geographical Limits: |
Brock Crags to Angle Tarn, south of Ullswater, Cumbria. |
| Parent Unit: |
Borrowdale Volcanic Group (BVG)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Brock Crags, about 1 km northeast of Hartsop, Ullswater, Cumbria. |
| Reference(s): |
| Woodhall, D G. 2000. The geology of the Haweswater and Martindale areas of the north-eastern Lake District. British Geological Survey Technical Report WA/00/55. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E030
E039
|
