BGS mineralogy and petrology collection record

Sample number E67081; COLLNOWPR138B;
Sample Donor Pratt, W.
Rock name 'Original entry: Dolerite'
Stratigraphy Not entered
Comments Penygader Formation. Dolerite (volcanic)
Locality details 750 m at 328 deg from Pen y Wen
50k map sheet Barmouth (149)

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Map reference SH 5791 0406
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


E67081

Cross Polarized, E67081

Plane Polarized, E67081

Plane Polarized, E67081