BGS mineralogy and petrology collection record
| Sample number | S18486 |
|---|---|
| Sample Donor | Tait,D. |
| Rock name | 'Original entry: Glassy Acid Interior Of Sill' |
| Stratigraphy | Not entered |
| Comments | Sapphire-bearing sill; Memoir, pp. 273, 286-287; QJGS, Vol 78, 1922, Plate VI, Fig. 1; between the two sapphire-bearing sills (sheath and cone); blade-like and acicular crystals of augite, small porphyritic crystals of labradorite |
| Locality details | Rubh' a' Chromain, N side of promontory |
| 50k map sheet | Mull (44) |
| Map reference | NM 5237 2031 |
| Year collected | Not entered |
| Bore name | Not applicable |
| Confidentiality | No restrictions |
Petrological thin sections
Links to high resolution images
Transition from XPL to PPL light
S18486
