BGS mineralogy and petrology collection record

Sample number S40423; S40423/A; S40423/B; S40423/C; COLLNOXT8;
Sample Donor McCall, J.
Rock name 'Original entry: Trondhjemite Porphyry'
Stratigraphy Not entered
Comments Felsic porphyrite (?of trondhjemitic affinities). Irregular intrusive body cutting permeation granite gneiss (Moine pelitic host) and foliated lamprophyre (S. 40424). Summ Prog 1954, pp. 59-60. Summ Prog 1955, pp. 58, 60-61
Locality details Allt an Fhaing, 1100 yds S 34 deg W of Callop
50k map sheet Loch Eil (62)

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Map reference NM 9199 7806
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


S40423

Cross Polarized, S40423

Plane Polarized, S40423

Plane Polarized, S40423


S40423/A

Cross Polarized, S40423/A

Plane Polarized, S40423/A

Plane Polarized, S40423/A


S40423/B

Cross Polarized, S40423/B

Plane Polarized, S40423/B

Plane Polarized, S40423/B


S40423/C

Cross Polarized, S40423/C

Plane Polarized, S40423/C

Plane Polarized, S40423/C