BGS mineralogy and petrology collection record

Sample number S28240
Sample Donor Read, H.H.
Rock name 'Original entry: Granular Quartz-Oligoclase Gneiss'
Stratigraphy Not entered
Comments Gneiss; Valla Field Gneiss Group
Locality details Valla Field, above Loch of Bogligarths
50k map sheet Unst (131)

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Map reference HP 582 079
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


S28240

Cross Polarized, S28240

Plane Polarized, S28240

Plane Polarized, S28240