| Collection | ABDUG University of Aberdeen, Geological Collections |
| Object Name | Porphyrite |
| Object Number | ABDUG Rock.8462 |
| Brief Description | Anorthoclase, oligoclase porphyrite (specimen from centre) Specimen from margin represented by 8463 |
| Place Key | 100 yds S of Carraig Mhòr, G.R. NM 367176, Ross of Mull, Strathcylde/Argyll & Bute, Scotland |
| Aquisition Source | H.W. Topham 84 |
| Aquisition Date | 01/01/1972 |