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
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