BGS mineralogy and petrology collection record

Sample number E21960
Sample Donor Shannon,W.G.
Rock name Porphyry; Rhyolite;. 'Original entry: Porphyritic Rhyolite Or Felsite'
Stratigraphy Not entered
Comments Not entered
Locality details Withnoe
50k map sheet Plymouth (348)

View images in GeoScenic related to 'Plymouth'

Map reference Not entered
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


E21960

Cross Polarized, E21960

Plane Polarized, E21960

Plane Polarized, E21960