BGS mineralogy and petrology collection record

Sample number E18610; E18610/A; E18610/B;
Sample Donor Dines,H.G.
Rock name 'Original entry: Acid Tuff With Phosphorite'
Stratigraphy Not entered
Comments Phosphatized bed in stream bottom
Locality details Blaeny Cwm Mine, 0.5 ml NW of Church Pennant, Melangell
50k map sheet Bala (136)

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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


E18610

Cross Polarized, E18610

Plane Polarized, E18610

Plane Polarized, E18610


E18610/A

Cross Polarized, E18610/A

Plane Polarized, E18610/A

Plane Polarized, E18610/A


E18610/B

Cross Polarized, E18610/B

Plane Polarized, E18610/B

Plane Polarized, E18610/B