BGS mineralogy and petrology collection record

Sample number S21549
Sample Donor Richey, James E.
Rock name 'Original entry: Quartz-Monzonite'
Stratigraphy Not entered
Comments Biotite gabbro or tonalite; Memoir, p. 339
Locality details 700 yds E 10 deg S of Achnaha
50k map sheet Coll (51)

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Map reference NM 4693 6823
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


S21549

Cross Polarized, S21549

Plane Polarized, S21549

Plane Polarized, S21549