BGS mineralogy and petrology collection record
| Sample number | E72172; COLLNODMA220; |
|---|---|
| Sample Donor | Millward, D. |
| Rock name | Porphyry. |
| Stratigraphy | Caradoc. |
| Comments | quartz-phyric felsite, dyke |
| Locality details | Ash Knott, Mardale |
| 50k map sheet | Appleby (30) |
| Map reference | NY 5042 -189 |
| Year collected | 1998 |
| Bore name | Not applicable |
| Confidentiality | No restrictions |