BGS mineralogy and petrology collection record

Sample number S52165; COLLNOYS451;
Sample Donor Armstrong,M.
Rock name 'Original entry: Biotite-Feldspar Porphyrite, Grey Altered Variety'
Stratigraphy Not entered
Comments Biotite-feldspar porphyrite, grey altered variety, in Lower ORS
Locality details Excavations, Eton St, Dundee
50k map sheet Perth (48)

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Map reference NO 3726 3032
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


S52165

Cross Polarized, S52165

Plane Polarized, S52165

Plane Polarized, S52165