| Computer Code: |
BLBR |
Preferred Map Code: |
BlBr |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Volcaniclastic breccia and pebbly volcaniclastic sandstone with some intercalated volcaniclastic sandstone. |
| Definition of Lower Boundary: |
Base of lowest thick unit (c.75m) of breccia and/or pebbly sandstone, resting with probable conformity on sandstone of the Deepdale Sandstone Formation. |
| Definition of Upper Boundary: |
Top of highest thick (c.20 - 30m) unit of breccia and/or pebbly sandstone, overlain by sandstone of the Deepdale Sandstone Formation. |
| Thickness: |
200m (maximum) |
| Geographical Limits: |
Hart Crag and Hartsop above How, northeastern Lake District. (Between Grasmere and Patterdale). |
| Parent Unit: |
Deepdale Sandstone Formation (DPD)
|
| Previous Name(s): |
Blake Brow Member [Obsolete Name and Code: Use BLBR]
(-2617)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Crags at Blake Brow, 3.5km southwest of Deepdale. |
| Type Section |
(Of the Deepdale Formation). Crags along the south side of Link Cove, 3.9km southwest 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
|
