BGS mineralogy and petrology collection record

Sample number S27582
Sample Donor Simpson,J.B.
Rock name 'Original entry: Acid Biotite Porphyrite (Fp)'
Stratigraphy Not entered
Comments Acid biotite porphyrite (fP), block in ash. Not shown on 1inch map
Locality details Roadside pit 500 yards W of Corsencon Farm
50k map sheet Sanquhar (15)

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Map reference NS 664 138
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


S27582

Cross Polarized, S27582

Plane Polarized, S27582

Plane Polarized, S27582