BGS mineralogy and petrology collection record

Sample number S11056
Sample Donor Barrow, G.
Rock name 'Original entry: Grey Gneiss'
Stratigraphy Not entered
Comments Much parallel biotite, but a few crystals of biotite at a high angle with foliation, i.e. a slightly speckled gneiss; abundant microcline, a little plagioclase and some quartz.The muscovite crystals are not common but they show a plumose, pegmatite s
Locality details NW corner of 146NW(W)
50k map sheet Kingussie (64)

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Map reference NN 718 810
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


S11056

Cross Polarized, S11056

Plane Polarized, S11056

Plane Polarized, S11056