BGS mineralogy and petrology collection record

Sample number S30351
Sample Donor Macgregor,A.G.
Rock name 'Original entry: Biotite Quartz-Diorite'
Stratigraphy Not entered
Comments Coarse-grained biotitic rock recalling Strontian tonalite; semiconcordant intrusion in schists
Locality details Allt Coire Mhic Gugain 1270 yds E 27 deg N of spot ht 2136 ft Beinn na Cille
50k map sheet Tobermory (52)

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Map reference NM 8620 5558
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


S30351

Cross Polarized, S30351

Plane Polarized, S30351

Plane Polarized, S30351