BGS mineralogy and petrology collection record
| Sample number | E28877; COLLNO109; |
|---|---|
| Sample Donor | Road Research Laboratory |
| Rock name | 'Original entry: Porphyritic Trachyte' |
| Stratigraphy | Not entered |
| Comments | Claimed to be horneblende-porphyrite (P) Described as Qtz-Oligoclase-Trachyte (P) |
| Locality details | Downhead Qy., Shepton Mallet |
| 50k map sheet | Frome (281) |
| Map reference | ST 688 461 |
| 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
E28877
