BGS mineralogy and petrology collection record

Sample number S38112; COLLNOXJ53;
Sample Donor Johnstone,G.S.
Rock name 'Original entry: Autobrecciated Trachyte Cf. Quartz Trachyte'
Stratigraphy Not entered
Comments Immediately below clayey tuff below mugearite. Calciferous Sandstone Lavas - ?trachyandesite. Autobrecciation or xenolithic trachyandesite. About 9 inches from S. 38111 and a few inches lower.
Locality details Rough Burn 800 yds due E of Hannah Law
50k map sheet Glasgow (30)

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Map reference NS 3140 6172
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


S38112

Cross Polarized, S38112

Plane Polarized, S38112

Plane Polarized, S38112