BGS mineralogy and petrology collection record

Sample number E6947; NEG642M;
Sample Donor Usher,W.A.E.
Rock name Rhyolite. 'Original entry: Elvan'
Stratigraphy Not entered
Comments Micropegmatite phenocrysts. Zincblende, feldspar, micaceous.
Locality details Quarry near Brannel.
50k map sheet Bodmin (347)

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Map reference SW 956 517
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


Cross Polarized, E6947

Plane Polarized, E6947

Plane Polarized, E6947