BGS mineralogy and petrology collection record

Sample number S30740; COLLNOTR267;
Sample Donor Robertson,T.
Rock name 'Original entry: Porphyritic Granodiorite; Acid Porphyrite'
Stratigraphy Not entered
Comments Porphyritic granodiorite; acid porphyrite; W Shetland Mem, p. 256
Locality details J2. Northernmost Point of Longa Voe, Braga Ness
50k map sheet Central Shetland (128)

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Map reference HU 319 601
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


S30740

Cross Polarized, S30740

Plane Polarized, S30740

Plane Polarized, S30740