BGS mineralogy and petrology collection record

Sample number S21393
Sample Donor Simpson,J.B.
Rock name 'Original entry: Grey Orthogneiss, Very Igneous-Looking; Quartz, Oligoclase, Biotite'
Stratigraphy Not entered
Comments In biotite granite series close to where the igneous rock S. 21391-21393 is intruded; Memoir pp. 11, 20
Locality details Shore 720 yds E 5 deg S of Lochan a' Chuirn
50k map sheet Coll (51)

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Map reference NM 1265 5200
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


S21393

Cross Polarized, S21393

Plane Polarized, S21393

Plane Polarized, S21393