| Computer Code: |
NPN |
Preferred Map Code: |
NPN |
| Status Code: |
Index Level |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
[Obsolete: use LME] Varied tuffs, lapilli tuffs and pyroclastic breccias with intercalated sedimentary rocks. |
| Definition of Lower Boundary: |
Base of the varied sequence of pyroclastic rocks, etc that unconformably overlie the Crinkle Tuff Member (high-grade rhyolitic tuff) in the Airy's Bridge Tuff Formation. |
| Definition of Upper Boundary: |
Defined by base of overlying members of the Lingmell Formation, usually the Scafell Dacite, and by the succeeding Seathwaite Fells Formation volcaniclastic sandstone. |
| Thickness: |
0 to 65m |
| Geographical Limits: |
Rosthwaite Fell (NY 25 12) to Scafell (NY 20 06), Bell Crag (NY 29 14) and Great Langdale (NY 28 06), Cumbria. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Scafell to Rosthwaite Fell. |
| Reference(s): |
| 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
|
