BGS mineralogy and petrology collection record

Sample number S13504
Sample Donor Wright, William Bourke (only Wright in Survey before 1935, prob. same as H B Wright above)
Rock name 'Original entry: Hornblende Gneiss'
Stratigraphy Not entered
Comments Some quartz and biotite; Colonsay Mem, pp. 11-12
Locality details Leac Buidhe, Colonsay
50k map sheet Colonsay (35)

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Map reference NM 426 004
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


S13504

Cross Polarized, S13504

Plane Polarized, S13504

Plane Polarized, S13504