BGS mineralogy and petrology collection record

Sample number S28239
Sample Donor Read, H.H.
Rock name 'Original entry: Epidotic Muscovite-Biotite-Oligoclase Gneiss'
Stratigraphy Not entered
Comments Gneiss (lowest); Valla Field Gneiss Group
Locality details Valla Field, above Loch of Bogligarths
50k map sheet Unst (131)

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Map reference HP 581 079
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


S28239

Cross Polarized, S28239

Plane Polarized, S28239

Plane Polarized, S28239