BGS mineralogy and petrology collection record

Sample number E54237; COLLNOFU29;
Sample Donor Fletcher, Chris J.N
Rock name 'Original entry: Dolerite'
Stratigraphy Not entered
Comments Dolerite dyke in slates. Possibly brecciated.
Locality details Quarry face, 1050 m. at 75 deg from Central Chapel, Talysarn.
50k map sheet Nefyn (118)

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Map reference SH 4988 5331
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


E54237

Cross Polarized, E54237

Plane Polarized, E54237

Plane Polarized, E54237