BGS mineralogy and petrology collection record

Sample number S13641
Sample Donor Wright, William Bourke (only Wright in Survey before 1935, prob. same as H B Wright above)
Rock name 'Original entry: Grit'
Stratigraphy Not entered
Comments Balnahard kentallenite mass: Peculiar glomeratic structure; Colonsay Mem, p. 33
Locality details Balnahard, Colonsay
50k map sheet Colonsay (35)

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Map reference NR 4123 9907
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


S13641

Cross Polarized, S13641

Plane Polarized, S13641

Plane Polarized, S13641