BGS mineralogy and petrology collection record

Sample number S21368
Sample Donor Simpson,J.B.
Rock name 'Original entry: Dark Orthogneiss; Hornblende, Plagioclase, A Little Quartz And Garnet'
Stratigraphy Not entered
Comments A sill of horblende schist, sometimes splitting and including bands of paragneiss; Memoir, p. 11
Locality details W shore of Loch Breachacha, 500 yds S 5 deg W of fort
50k map sheet Coll (51)

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Map reference NM 1554 5254
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


S21368

Cross Polarized, S21368

Plane Polarized, S21368

Plane Polarized, S21368