BGS mineralogy and petrology collection record

Sample number E61950; COLLNOMH1551;
Sample Donor Howells,M.F.
Rock name Metavolcaniclastic-Sand.
Stratigraphy Not entered
Comments Acid tuff, ? Granophyre
Locality details 1 Km ESE of Tyran Mawr
50k map sheet Barmouth (149)

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Map reference SN 6907 1128
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


E61950

Cross Polarized, E61950

Plane Polarized, E61950

Plane Polarized, E61950