BGS mineralogy and petrology collection record

Sample number E30782; COLLNOA280;
Sample Donor Blake,J.F.
Rock name Not entered
Stratigraphy Not entered
Comments 11
Locality details Penrhyn Quarry., ca 1 mile S of Bethesda. Water Tunnel
50k map sheet Bangor (106)

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Map reference SH 62 65
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


E30782

Cross Polarized, E30782

Plane Polarized, E30782

Plane Polarized, E30782