BGS mineralogy and petrology collection record

Sample number S13545
Sample Donor Wright, William Bourke (only Wright in Survey before 1935, prob. same as H B Wright above)
Rock name 'Original entry: Cleaved Lamprophyre'
Stratigraphy Not entered
Comments Very rotten; contains quartz and quartzite xenocrysts
Locality details E of Creag Bhan, 0.5 mile SSE of Balnahard
50k map sheet Colonsay (35)

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Map reference NR 4170 9891
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


S13545

Cross Polarized, S13545

Plane Polarized, S13545

Plane Polarized, S13545