BGS mineralogy and petrology collection record
| Sample number | E28016 |
|---|---|
| Sample Donor | Collins,G.H. |
| Rock name | 'Original entry: Tuff' |
| Stratigraphy | Not entered |
| Comments | Welded tuff, Lower Rhyolite Tuff |
| Locality details | Roadside Crags, 600 yds SE of Pont y Gromlech, Llanberis Pass |
| 50k map sheet | Snowdon (119) |
| Map reference | SH 633 563 |
| Year collected | Not entered |
| Bore name | Not applicable |
| Confidentiality | No restrictions |