BGS mineralogy and petrology collection record

Sample number E25412; COLLNORH46;
Sample Donor Hoare,R.H.
Rock name Tuff. 'Original entry: Crystal Tuff'
Stratigraphy Not entered
Comments Isolated crags in field
Locality details 250 yds. at 300o from Tan-Yr-Alt; 1200 yds. at 250o from chapel at Henrhyd
50k map sheet Bangor (106)

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Map reference SH 763 745
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


Cross Polarized, E25412

Plane Polarized, E25412

Plane Polarized, E25412