BGS mineralogy and petrology collection record

Sample number E8371; MR8025;
Sample Donor Reynolds, Professor
Rock name Trachytic-Rock. 'Original entry: Quartz Keratophyre'
Stratigraphy Not entered
Comments Porphyritic soda orthoclase with Qtz.
Locality details Careg y Defaid, W of Pwllheli
50k map sheet Pwllheli (134)

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Map reference SH 342 325
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, E8371

Plane Polarized, E8371

Plane Polarized, E8371