BGS mineralogy and petrology collection record

Sample number E25372; COLLNO8;
Sample Donor Hoare,R.H.
Rock name Tuff. 'Original entry: Crystal Tuff'
Stratigraphy Not entered
Comments Not entered
Locality details Trecastell Lead Mine. No.4 Borehole (1953)
50k map sheet Bangor (106)

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Map reference SH 763 745
Year collected Not entered 
Bore name Trecastell Lead Mines No.4
Confidentiality No restrictions

Petrological thin sections

Links to high resolution images

Transition from XPL to PPL light


Cross Polarized, E25372

Plane Polarized, E25372

Plane Polarized, E25372