BGS mineralogy and petrology collection record

Sample number S11546
Sample Donor Grabham, G.W.
Rock name 'Original entry: Quartz-Biotite Porphyry'
Stratigraphy Not entered
Comments Vein in quartz porphyry; Memoir, p. 174
Locality details 440 yds N 33 deg E of mouth of Coire Ghiubhasan, on W foot of Beinn Mhic Chasgaig
50k map sheet Ben Nevis (53)

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Map reference NN 2015 5018
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


S11546

Cross Polarized, S11546

Plane Polarized, S11546

Plane Polarized, S11546