BGS mineralogy and petrology collection record

Sample number S11088
Sample Donor Barrow, G.
Rock name 'Original entry: Quartz-Biotite Rock'
Stratigraphy Not entered
Comments Lenticular structure. Altered by granite. Alternating lenticles of quartzofeldspathic material and decomposed biotite and cordierite or garnet. Feldspar fresh like that of the feldspar hornfels.
Locality details Hill top north of Clach Glas, Tilt
50k map sheet Kingussie (64)

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Map reference NN 914 730
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


S11088

Cross Polarized, S11088

Plane Polarized, S11088

Plane Polarized, S11088