| Computer Code: |
ABR |
Preferred Map Code: |
AbR |
| Status Code: |
Index Level |
| Age range: |
Duckmantian Substage (CB)
— Duckmantian Substage (CB) |
| Lithological Description: |
A thinly bedded, fine-grained, ripple cross-laminated, yellowish brown sandstone. |
| Definition of Lower Boundary: |
Sharp upward change in a conformable succession from predominantly grey mudstone to sandstone - base of first sandstone above the Abdy or Winter Coal. |
| Definition of Upper Boundary: |
Sharp upward change in a conformable succession from sandstone to predominantly mudstone - top of last sandstone bed below the Two-Foot Coal and overlying Maltby (Two-Foot) Marine Band. |
| Thickness: |
0 to 53m |
| Geographical Limits: |
From southwest of Wath upon Dearne around the hamlet of Abdy [SK4430 9880], South Yorkshire, to Staincross Common, [SE3300 1100] Barnsley, South Yorkshire. |
| Parent Unit: |
Pennine Middle Coal Measures Formation (PMCM)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Section 250m north of Darton Lane Head, Stainscross Common, South Yorkshire. Mitchell et al, 1947. |
| Reference Section |
Yorkshire Main Colliery shaft (SK59NW/4), full thickness recorded from 698.0 to 724.5m. Mitchell et al, 1947. |
| Reference(s): |
| Mitchell, G H, Stephens, J V, Bromehead, C E N and Wray, D A. 1947. Geology of the Country around Barnsley. Memoir of the British Geological Survey, Sheet 87 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E087
|
