BGS mineralogy and petrology collection record
| Sample number | MR22628 |
|---|---|
| Sample Donor | Not entered |
| Rock name | Felsite, Porphyritic. 'Original entry: Porphyritic Felsite' |
| Stratigraphy | Not entered |
| Comments | porphyritic felsite, ,Collected by D C Knill:166 |
| Locality details | Derryhassan School. Derryhassan, Rosguill, Co. Donegal,surface exposure,Republic of Ireland |
| 50k map sheet | Not entered |
| Map reference | Not entered |
| Year collected | 1960 |
| Bore name | Not applicable |
| Confidentiality | No restrictions |