| Corncockle Sandstone Formation | |
| Type: | Geological formation |
| Age: | Cisuralian |
| Period: | Cisuralian |
| Prilithology: | Sandstone |
| Namedfor: | Corncockle Quarry |
| Country: | Scotland |
| Unitof: | Stewartry Group |
| Underlies: | Lochmaben Formation |
| Overlies: | Hartfield Formation |
| Thickness: | 900+ m |
| Area: | Lochmaben Basin |
The Corncockle Sandstone Formation is a formation of Cisuralian age (Early Permian). It is part of the fill of the Lochmaben Basin in the Southern Uplands. It forms part of the Stewartry Group.[1]