BGS mineralogy and petrology collection record

Sample number S13568
Sample Donor Wright, William Bourke (only Wright in Survey before 1935, prob. same as H B Wright above)
Rock name 'Original entry: Quartzite Dissolving In Hornblendite'
Stratigraphy Not entered
Comments Dissolving boulders and feldspathic halos
Locality details 0.33 mile W of Carnan Eoin, Colonsay
50k map sheet Colonsay (35)

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Map reference NR 4036 9835
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


S13568

Cross Polarized, S13568

Plane Polarized, S13568

Plane Polarized, S13568