BGS mineralogy and petrology collection record

Sample number S29457
Sample Donor Macgregor,A.G.
Rock name 'Original entry: Rotten Acid Porphyrite (Fp)'
Stratigraphy Not entered
Comments Rotten acid porphyrite (fP), 9-12 foot NE felsitic dyke cuts strongly baked Silurian sediments
Locality details Spango Water left bank 220 yards E 37 deg N of Fingland
50k map sheet Sanquhar (15)

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Map reference NS 755 177
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


S29457

Cross Polarized, S29457

Plane Polarized, S29457

Plane Polarized, S29457