| Computer Code: |
LMN |
Preferred Map Code: |
LMN |
| Status Code: |
Full |
| Age range: |
Cisuralian Epoch (PLC)
— Cisuralian Epoch (PLC) |
| Lithological Description: |
Red, irregularly bedded siltstone and fine-grained sandstone that may be cross-bedded. It includes beds of coarse-grained sandstone with well-rounded frosted grains in a fine matrix, slump structures, small gypsiferous nodules, breccio-conglomerate and near-horizontal gypsum-cemented veins. |
| Definition of Lower Boundary: |
Apparently conformable lithostratigraphical boundary with underlying coarse, red sandstone of "millet seed" grains of Corncockle Sandstone Formation as noted in the log of borehole NY08SE/1 at the Princes Street Dairy, Lochmaben. |
| Definition of Upper Boundary: |
Not seen; any rocks deposited over the Lochmaben Formation are no longer preserved. |
| Thickness: |
More than 54m proven in the Lochmaben Hospital Trial Borehole. |
| Geographical Limits: |
Lochmaben Basin, Dumfriesshire, southwestern Scotland [Southern Uplands]. |
| Parent Unit: |
Stewartry Group (STEW)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Lochmaben OBS [Lochmaben Hospital Trial Borehole] NY08SE/1. Bedrock concealed under 36m superficial deposits. 54m of bedrock drilled, to a total depth of 90m. Cored intervals 49-52m, 53-55m, 65-67.8m and 80-83m; samples taken 49m, 49.6m,49.7m, 52.7m, 65.1m, 65.4m, 65.7m, 66.3m, 80.1m, 80.2m, 80.7m, 80.9m, 81.7m, 81.9m depth. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S010
|
