BGS mineralogy and petrology collection record

Sample number E63673; COLLNOKB673;
Sample Donor Not entered
Rock name Tuff. 'Original entry: Ash Flow Tuff'
Stratigraphy Not entered
Comments Analysis suggests intermediate composition(GROUP= )(FORM= Nant Ffrancon Fm.)(MEMB= Y Glog Unit 2.)(IE=E)(TEXTURE=
Locality details Tremadoc
50k map sheet Snowdon (119)

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Map reference SH 5613 4095
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, E63673

Plane Polarized, E63673

Plane Polarized, E63673