Computer Code: |
HRO |
Preferred Map Code: |
Hro |
Status Code: |
Index Level |
Age range: |
Pendleian Substage (CE)
— Pendleian Substage (CE) |
Lithological Description: |
A grey, medium- to coarse-grained, thinly to thickly bedded, crinoidal limestone, interpreted to have a turbiditic origin. Individual beds show slumping at the base, are massive bedded above and the tops may be ripple cross-laminated. |
Definition of Lower Boundary: |
A sharp upward change in a conformable succession from predominantly grey mudstone to limestone. The base of the first limestone bed above the Harlow Hill Sandstone. |
Definition of Upper Boundary: |
A sharp upward change in a conformable succession from limestone to predominantly mudstone. The top of the last limestone bed below the Cravenoceras malhamense (E1c1) Marine Band. |
Thickness: |
20m |
Geographical Limits: |
The Harrogate area, |
Parent Unit: |
Pendleton Formation (PENDL)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Reference Section |
Crimple Beck Borehole, SE25SE/12, near Beckwithshaw, Harrogate, North Yorkshire; between 38.8 m and 59.4 m depth. Cooper and Burgess, 1993. |
Reference(s): |
Cooper, A H and Burgess, I C. 1993. Geology of the country around Harrogate. Memoir for 1:50000 geological sheet 62 (England and Wales). London: HMSO for the British Geological Survey. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E062
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