BGS mineralogy and petrology collection record

Sample number E20217; COLLNOAWW50;
Sample Donor Woodland,A.W.
Rock name 'Original entry: Siltstone With Pebbly Laminae'
Stratigraphy Not entered
Comments Unmetasomatized ?. A vein in this rock is composed of carbonate, mica and barytes. Near junction of cross measure drift in waste in Northern part of middle lead. believing it to be a lateral development of the ore bed.
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


E20217

Cross Polarized, E20217

Plane Polarized, E20217

Plane Polarized, E20217