BGS mineralogy and petrology collection record

Sample number S13499
Sample Donor Wright, William Bourke (only Wright in Survey before 1935, prob. same as H B Wright above)
Rock name 'Original entry: Biotite Gneiss (Curshed)'
Stratigraphy Not entered
Comments Rutile in biotite; Colonsay Mem, pp. 11-12
Locality details On shore, Croisebrig, Colonsay
50k map sheet Colonsay (35)

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Map reference NM 429 004
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


S13499

Cross Polarized, S13499

Plane Polarized, S13499

Plane Polarized, S13499