BGS mineralogy and petrology collection record

Sample number E19786; MR17651; COLLNOAWW44;
Sample Donor Woodland,A.W.
Rock name 'Original entry: Chlorite, Carbonate, Manganese Ore And Collophane'
Stratigraphy Not entered
Comments Variations of beds containing rolled pellets of sponge-bearing collophanite. The field relations of this rock are not known but there is some reason for believing it to be a lateral development of the ore bed.
Locality details Old shaft on Crown land. cf. 150 Yds. N. of Benallt Mine.
50k map sheet Aberdaron and Bardsey Island (133)

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Map reference SH 222 283
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


E19786

Cross Polarized, E19786

Plane Polarized, E19786

Plane Polarized, E19786