BGS mineralogy and petrology collection record

Sample number E46333; COLLNOBP35;
Sample Donor Lowe,D.J.
Rock name 'Original entry: Porphyritic Volcanic Rock'
Stratigraphy Not entered
Comments Feldspar porphyry intrusion, Ordovician
Locality details Stream Bank, 370 m at 131 deg from Allt Lwyd
50k map sheet Harlech (135)

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Map reference SH 8002 2865
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


E46333

Cross Polarized, E46333

Plane Polarized, E46333

Plane Polarized, E46333