| Computer Code: |
BES |
Preferred Map Code: |
BES |
| Status Code: |
Full |
| Age range: |
Kinderscoutian Substage (CK)
— Kinderscoutian Substage (CK) |
| Lithological Description: |
Sandstone, protoquartzitic, in sharp-based medium-bedded units with some preserved sole marks on the bases of units, and mudstone with ironstone beds and nodules. Soft sediment deformation structures common in places. |
| Definition of Lower Boundary: |
The lower boundary is taken at the base of the first protoquartzitic sandstone-dominated unit above black fissile mudstone that includes a Hodsonites magistrorum Marine Band. |
| Definition of Upper Boundary: |
The upper boundary is taken at the base of mudstone-dominated succession overlying the Blackstone Edge Sandstone, below black fissile mudstone that includes a Reticuloceras reticulatum Marine Band. |
| Thickness: |
30m |
| Geographical Limits: |
West Derbyshire - north-east Staffordshire. Revidge [SK075 598] - Blackbank [SK032 666]. |
| Parent Unit: |
Morridge Formation (MORRI)
|
| Previous Name(s): |
Ballbrook Sandstone Member [Obsolete Name and Code: Use BES]
(-3841)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
Blackstone Edge (Staffordshire); natural cliff section exposing partial section of the unit (no further details available). Aitkenhead et al., 1985. |
| Reference Section |
Stream section at Blake Brook (Shawfield, Staffordshire) exposes 29.8m full section of the unit, section logged and lodged as borehole SK06SE/17. (no further details available). Aitkenhead et al., 1985. |
| Reference(s): |
| Aitkenhead, N, Chisholm, J I, and Stevenson, I P. 1985. Geology of the country around Buxton, Leek and Bakewell. Memoir of the British Geological Survey, England and Wales Sheet 111. |
| Holdsworth, B K, 1963. The palaeontology, stratigraphy, and sedimentology of Namurian rocks in the Longnor-Hollinsclough-Morridge region, north-east Staffordshire and south-west Derbyshire. Unpublished PhD thesis, University of Manchester. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E111
|
