BGS mineralogy and petrology collection record
| Sample number | MR851 |
|---|---|
| Sample Donor | Not entered |
| Rock name | 'Original entry: Granite Porphyry' |
| Stratigraphy | Not entered |
| Comments | Intrusive into Bala. 354/41, B/158 |
| Locality details | Bwlch-yr-Eifl, NW face, Caernarvonshire |
| 50k map sheet | Nefyn (118) |
| Map reference | SH 363 454 |
| Year collected | Not entered |
| Bore name | Not applicable |
| Confidentiality | No restrictions |