| Computer Code: |
DGY |
Preferred Map Code: |
Dgy |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Volcaniclastic siltstone, sandstone and breccia characterised by widespread syndepositional deformation and slumping such that bedding, particularly in the finer lithologies, is rarely preserved |
| Definition of Lower Boundary: |
Taken at the base of dominantly disrupted units overlying volcaniclastic rocks of the Three Tarns, Cam Crags and Harrison Stickle members |
| Definition of Upper Boundary: |
Defined by the base of overlyig pyroclastic rocks of the Pavey Ark Breccia Member |
| Thickness: |
Up to 60m |
| Geographical Limits: |
Scafell Pike to the Langdale Pikes, and from Seathwaite Fell (Borrowdale) to Thirlmere, Cumbria |
| Parent Unit: |
Seathwaite Fell Sandstone Formation (SET)
|
| Previous Name(s): |
Dungeon Ghyll Member [Obsolete Name and Code: Use DGY]
(-4604)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Langdale Pikes, Cumbria Kneller and McConnell, 1993 |
| 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 and McConnell, B J . 1993. The Seathwaite Fell Formation in the central Fells. British Geological Survey Technical Report WA/93/43 |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
