BGS mineralogy and petrology collection record

Sample number E64400; COLLNOTL31;
Sample Donor Not entered
Rock name Tuff. 'Original entry: Acid Ash Flow Tuff'
Stratigraphy Not entered
Comments Top (approx. 40m above base) of ash-flow unit(GROUP= Snowdon Volcanic Group)(FORM= Lower Crafnant Volc. Fm.)(MEMB= No.3 Tuff.)(IE=E)(TEXTURE=
Locality details Creigiau Gleision, Cowlyd
50k map sheet Bangor (106)

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Map reference SH 7323 6206
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, E64400

Plane Polarized, E64400

Plane Polarized, E64400