BGS mineralogy and petrology collection record

Sample number S23868
Sample Donor Read, H.H.
Rock name 'Original entry: Porphyry'
Stratigraphy Not entered
Comments Porphyry, pebble in quartzite conglomerate
Locality details Old quarries and road bank, 0.5 miles 220 yards W 30 deg N of Eastfield
50k map sheet Hamilton (23)

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Map reference NS 958 334
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


S23868

Cross Polarized, S23868

Plane Polarized, S23868

Plane Polarized, S23868