BGS mineralogy and petrology collection record
| Sample number | E23885; COLLNOBN29; |
|---|---|
| Sample Donor | Bisson,G. |
| Rock name | 'Original entry: Sodic Lava (Keratophyre/Quartz) In Crystal Lithic Tuff' |
| Stratigraphy | Not entered |
| Comments | Surface outcrop or large boulder. Within 524 ft. of W. portal. |
| Locality details | Prewley Tunnel, from dump at W. end. |
| 50k map sheet | Okehampton (324) |
| Map reference | SX 549 909 |
| 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
E23885
