| Computer Code: |
SIPI |
Preferred Map Code: |
SiPi |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
A chaotic, coarse volcanotectonic megabreccia comprising successions of tuff, lapilli-tuff, volcaniclastic sandstone, andesite and rhyolite. Some megablocks may be assigned to established formations, but other blocks are not recognizably parts of formations. The volcanic-complex passes laterally into more coherent stratigraphy. |
| Definition of Lower Boundary: |
Base faulted, passes into more coherant stratigraphy. |
| Definition of Upper Boundary: |
Faulted, passes into more coherant stratigraphy. |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Restricted to the area between Great Langdale and Wrynose Pass, Lake District, Cumbria. |
| Parent Unit: |
Borrowdale Volcanic Group (BVG)
|
| Previous Name(s): |
Side Pike Complex [Obsolete Name and Code: Use SIPI]
(-4884)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Great Langdale to Wrynose Pass, Cumbria. Millward et al., 2000. |
| Reference(s): |
| Branney, M J, and Kokelaar, B P. 1994. Volcanotectronic faulting, soft sediment deformation and rheomorphism of tuffs during development of a piecemeal caldera, English Lake District. Geological Society of America, Bulletin, Vol. 106, 507-530. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E038
|
