| 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
|
