BGS mineralogy and petrology collection record

Sample number E49050; COLLNOLA537;
Sample Donor Allen,P.M.
Rock name 'Original entry: Microdiorite'
Stratigraphy Not entered
Comments Siltstone
Locality details Glasdir Copper Mine; Bridge in Mid Pit
50k map sheet Harlech (135)

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Map reference SH 7410 2232
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


E49050

Cross Polarized, E49050

Plane Polarized, E49050

Plane Polarized, E49050