BGS mineralogy and petrology collection record

Sample number E20220; COLLNOAWW53;
Sample Donor Woodland,A.W.
Rock name 'Original entry: Grit With Superimposed Pisolitic And Concretionary Structure'
Stratigraphy Not entered
Comments Low grade ore. No "Waterfall" on lowest level. Concretionary and fragmental structures. Fractures filled with quartz and albite.
Locality details Nant Manganese Mine (after dewatering July 1943) Nant-y-Gadwen, Llanyael Rhys.
50k map sheet Aberdaron and Bardsey Island (133)

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Map reference
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


E20220

Cross Polarized, E20220

Plane Polarized, E20220

Plane Polarized, E20220