Computer Code: |
KBF |
Preferred Map Code: |
KbF |
Status Code: |
Index Level |
Age range: |
Alportian Substage (CO)
— Kinderscoutian Substage (CK) |
Lithological Description: |
[Obsolete: use HEBD, SAML] Ripple laminated shallow marine mudstones, siltstones and fine-grained sandstones with thick coarse-grained sandstones (Knott Copy Grit and Lane Foot Sandstone). |
Definition of Lower Boundary: |
Lower boundary taken at base of coal and seatearths at the base of the Kirkbeck Member, which overlie cross-bedded coarse-grained sandstone (Accerhill Sandstone). |
Definition of Upper Boundary: |
Top marked by first coarse-grained cross-bedded sandstone of the Eldroth Grit, resting conformably on mudstones and siltstones of the Kirkbeck Member. |
Thickness: |
c.160m |
Geographical Limits: |
SD66NE and SD66NW. |
Parent Unit: |
none recorded or not applicable
|
Previous Name(s): |
Kirkbeck Member [Obsolete Name and Code: Use KBF]
(-337)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Section |
Stream section west of Kirkbeck Farm. |
Reference Section |
Bentham Station Borehole. SD66NE/1 |
Reference(s): |
Ellison, R A, 1991. Geology of Bentham. British Geological Survey Technical Report, WA/91/83. |
Brandon, A, Aitkenhead, N, Crofts, R G, Ellison, R A, Evans, D J, and Riley, N J. 1998. Geology of the country around Lancaster. Memoir of the British Geological Survey, Sheet 59 (England and Wales). |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E059
|