BGS mineralogy and petrology collection record
| Sample number | E28227; COLLNOJW161; |
|---|---|
| Sample Donor | Wright,J.E. |
| Rock name | 'Original entry: Microdiorite' |
| Stratigraphy | Not entered |
| Comments | ? Microdiorite, pyritous; from irregular veins; c 10ft thick dyke |
| Locality details | Ffestiniog HE Tunnel No.1. 680 ft from chainage zero point |
| 50k map sheet | Snowdon (119) |
| Map reference | |
| 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
E28227
