| Computer Code: |
SCD |
Preferred Map Code: |
ScD |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Pale-weathered dacite, locally flow-banded and folded, with garnet phenocrysts; marginal autobreccia. |
| Definition of Lower Boundary: |
Base of dacite; unconformable - overlies older parts of the Lingmell Tuff Formation, and locally rests on the Airy's Bridge Tuff Formation (rhyolitic tuffs). |
| Definition of Upper Boundary: |
Overlain by the Seathwaite Fell Sandstone Formation (volcaniclastic sandstone and breccia). |
| Thickness: |
0 - 425m |
| Geographical Limits: |
Between Little Narrowcove (NY 2250 0675) and Aaron Crags (NY 2293 1038), Cumbria. |
| Parent Unit: |
Lingmell Tuff Formation (LME)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Little Narrowcove to Aaron Crags (NY 2293 1038); Criscliffe Knotts maximum thickness. |
| Reference(s): |
| Millward, D, Johnson, E W, Beddoe-Stephens, B, Young, B, Kneller, B C, Lee, M K, Fortey, N J, Allen, P M, Branney, M J, Cooper, D C, Hirons, S, Kokelaar, B P, Marks, R J, McConnell, B J, Merritt, J W, Molyneux, S G, Petterson, M G, Roberts, B, Rundle, C C, Rushton, A W A, Scott, R W, Soper, N J, and Stone, P. 2000. Geology of the Ambleside district. Memoir of the British Geological Survey, England and Wales, Sheet 38. |
| Kneller, B C, Kokelaar, B P and Davis, N C, 1993. The Lingmell Formation. British Geological Survey Technical Report, WA/93/43. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E038
E029
|
