| Computer Code: |
CAWD |
Preferred Map Code: |
Cawd |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
A massive, coarse tuff and tuff-breccia, with localised pyroclastic breccia and pebbly volcaniclastic sandstone. |
| Definition of Lower Boundary: |
Taken at the abrupt change to bedded pyroclastic rocks from either silicic lapilli-tuff of the Whelter Knotts Formation or from bedded volcaniclastic sandstone within the Mardale Formation. |
| Definition of Upper Boundary: |
Taken at the abrupt change to bedded volcaniclastic sandstone of the main part of the Mardale Formation. |
| Thickness: |
To 80m |
| Geographical Limits: |
Between Ullswater and the Haweswater Reservoir, eastern Lake District, Cumbria. |
| Parent Unit: |
Mardale Sandstone Formation (MRL)
|
| Previous Name(s): |
Cawdale Member [Obsolete Name and Code: Use CAWD]
(-111)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Four Stones Hill Beddoe-Stephens, 2000. |
| Reference(s): |
| Beddoe-Stephens, B. 2000. The Borrowdale Volcanic Group between Haweswater and eastern Ullswater. British Geological Survey Technical Report WG/00/04. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E030
E039
|
