BGS mineralogy and petrology collection record

Sample number S4902
Sample Donor Geikie,A.; Peach, B.N.;
Rock name 'Original entry: Andesite Or Dacite F'
Stratigraphy Not entered
Comments Silicified porphyrite (andesite) H
Locality details Castlelaw Hill, 800 ft SSE of Trig Station, Pentlands
50k map sheet Edinburgh (32)

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Map reference NT 226 645
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


S4902

Cross Polarized, S4902

Plane Polarized, S4902

Plane Polarized, S4902