| Computer Code: |
CKY |
Preferred Map Code: |
Cky |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Dacitic ignimbrite in the form of massive lapilli-tuff but with a lithologically distinct basal layer of parataxitic lapilli-tuff. |
| Definition of Lower Boundary: |
Most distinct where basal parataxitic lapilli-tuff rests on bedded sandstone (Deepdale Sandstone Formation). |
| Definition of Upper Boundary: |
Indistinct, but overlain by bedded sandstone (Deepdale Sandstone Formation). |
| Thickness: |
45m (maximum) |
| Geographical Limits: |
Confined to areas south and east of Deepdale Park, Deepdale, northeastern Lake District (between Grasmere and Patterdale). |
| Parent Unit: |
Deepdale Sandstone Formation (DPD)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Crags adjacent to Cockley How, 1-8km south-south-west of Deepdale. |
| Reference(s): |
| Woodhall, D G, 1998. The geology of the Wythburn, Thirlmere and Fairfield areas of the north-east Lake District. British Geological Survey Technical Report WA/98/07. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E029
E030
|
