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
|