BGS mineralogy and petrology collection record
| Sample number | S52649; COLLNOYR1304; |
|---|---|
| Sample Donor | Smith,D.I. |
| Rock name | 'Original entry: Dark Microdiorite' |
| Stratigraphy | Not entered |
| Comments | Dark microdiorite dyke |
| Locality details | Cruachan Main Tunnel, Chainage 13400 ft from outfall portal |
| 50k map sheet | Oban (45) |
| Map reference | NN 1049 3195 |
| Year collected | Not entered |
| Bore name | Not applicable |
| Confidentiality | No restrictions |
Petrological thin sections
Links to high resolution images
Transition from XPL to PPL light
S52649
