BGS mineralogy and petrology collection record

Sample number E67090; COLLNOWPR271;
Sample Donor Pratt, W.
Rock name 'Original entry: Tuff'
Stratigraphy Not entered
Comments Arthog Formation. Lithic tuff
Locality details 830 m at 293 deg from Pen y Wen
50k map sheet Barmouth (149)

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View the geology near 'Barmouth'

Map reference SH 5752 0374
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


E67090

Cross Polarized, E67090

Plane Polarized, E67090

Plane Polarized, E67090