BGS mineralogy and petrology collection record
| Sample number | S37850 |
|---|---|
| Sample Donor | Phemister,J. |
| Rock name | 'Original entry: Quartz-Feldspar Porphyry' |
| Stratigraphy | Not entered |
| Comments | Quartz-feldspar porphyry. See Min Mag 1950, Vol XXIX, p. 365; with chloritised microphenoicrysts of biotite |
| Locality details | E shore of Birka Water, 10 deg S of E of outflow |
| 50k map sheet | Yell (130) |
| Map reference | HU 317 874 |
| 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
S37850
