BGS mineralogy and petrology collection record

Sample number S45345; COLLNOYW25;
Sample Donor May,F.
Rock name 'Original entry: Sphene-Bearing Hornblende-Biotite Tonalite'
Stratigraphy Not entered
Comments Very large intrusion
Locality details 820 yds S 43 deg W of summit (1122 ft) of Cnocan Dubh
50k map sheet Loch Eil (62)

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Map reference NH 1679 0300
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


S45345

Cross Polarized, S45345

Plane Polarized, S45345

Plane Polarized, S45345