BGS mineralogy and petrology collection record

Sample number S28200
Sample Donor Read, H.H.
Rock name 'Original entry: Muscovite-Biotite Quartzite'
Stratigraphy Not entered
Comments Streaky biotite-feldspar gneiss, Burra Firth Group; feldspathic laminae
Locality details The Framd, Burra Firth
50k map sheet Unst (131)

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Map reference HP 613 176
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


S28200

Cross Polarized, S28200

Plane Polarized, S28200

Plane Polarized, S28200