BGS mineralogy and petrology collection record

Sample number S42800; COLLNOYB617;
Sample Donor Lawrie,T.R.M.
Rock name 'Original entry: Basic Hornblende Gneiss With Large Feldspar Porphyroblasts'
Stratigraphy Not entered
Comments Basic hornblende gneiss with large feldspar porphyroblasts. From band a few feet thick here, in ultrabasic pegmatised rock of S. 42798-432799 type between acid gneiss and psammite to W. The band with porphyroblasts is a few feet from the psammitic ju
Locality details Coir' a' Bhoganaich, 930 yds S 43 deg W of A' Chuil
50k map sheet Loch Eil (62)

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Map reference NM 9387 9177
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


S42800

Cross Polarized, S42800

Plane Polarized, S42800

Plane Polarized, S42800