BGS mineralogy and petrology collection record

Sample number S25885
Sample Donor Macgregor,A.G.
Rock name 'Original entry: Acid Porphyrite (F.P.)'
Stratigraphy Not entered
Comments Acid porphyrite (f.p.), fine-grained dark red intrusion in baked L.O.R.S. conglomerate
Locality details 570 yards E 5 deg N from Knockdon
50k map sheet Ayr (14)

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Map reference NS 438 007
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


S25885

Cross Polarized, S25885

Plane Polarized, S25885

Plane Polarized, S25885