BGS mineralogy and petrology collection record

Sample number E23601
Sample Donor Fearnsides,W.G.
Rock name Tuff. 'Original entry: Crystal Tuff'
Stratigraphy Not entered
Comments Not entered
Locality details Trescastell Lead Mine. 95 fathom Level E
50k map sheet Bangor (106)

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Map reference SH 763 745
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, E23601

Plane Polarized, E23601

Plane Polarized, E23601