| Computer Code: |
DHMR |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Langsettian Substage (CA)
— Langsettian Substage (CA) |
| Lithological Description: |
Sandstone, highly siliceous, with subordinate mudstone. |
| Definition of Lower Boundary: |
The lower boundary in the Mary Ann Opencast Borehole (SD83SW/78), is taken at the base of a silty sandstone of the Doghole Rock, that lies above the Doghole Coal. |
| Definition of Upper Boundary: |
The upper boundary in the Mary Ann Opencast Borehole (SD83SW/78), is taken at the base of a silty sandstone of the Doghole Rider Coal, a thin coal at the base of a shale-dominated sequence overlying the Doghole Rock. |
| Thickness: |
4.2m |
| Geographical Limits: |
Burnley [SD 83 32] to Ightenhill [SD 81 34] areas. |
| Parent Unit: |
Pennine Lower Coal Measures Formation (PLCM)
|
| Previous Name(s): |
Doghole Mine Rock [Obsolete Name and Code: Use DHMR]
(-3991)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Fulledge Colliery, shaft (SD83SW/17) [84560 32290], from 37 feet 6 inches to 51 feet, 6 inches below ground level. Wild, 1864. |
| Type Section |
Mary Anne Opencast Borehole (SD83SW/78) [81740 33810], from 91 feet to 103 feet 1 inch below ground level. This is the full thickness of the unit, and both top and base are present. Earp et al., 1961. |
| Reference(s): |
| Earp, J R, Magraw, D, Poole, E G, Land, D H, and Whiteman, A J. 1961. Geology of the country around Clitheroe and Nelson. Memoir of the Geological Survey of Great Britain, Sheet.68, England and Wales, p. 346. |
| Wright, W B, Sherlock, R L, Wray, D A, Lloyd, W and Tonks, L H, 1927. The Geology of the Rossendale Anticline. Memoir of the Geological Survey, England. England and Wales Sheet 76. |
| Wild, G, 1864. On the Fulledge section of the Burnley Coalfield. Transactions of the Manchester Geological Society, Vol.4, 179-190. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E068
E076
|
