BGS mineralogy and petrology collection record

Sample number S21990
Sample Donor Phemister,J.
Rock name 'Original entry: Perthosite'
Stratigraphy Not entered
Comments Typical syenite of locality; fully more mafic minerals than in usual perthosite
Locality details On E branch of Allt Sail an Ruathair, 115 yds from fork
50k map sheet Lairg (102)

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Map reference NC 33706 14166
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


S21990

Cross Polarized, S21990

Plane Polarized, S21990

Plane Polarized, S21990