BGS mineralogy and petrology collection record

Sample number E7253; COLLNO280;
Sample Donor Thomas, Dr.
Rock name 'Original entry: Tuff Or Decomposed Porphyry'
Stratigraphy Not entered
Comments Not entered
Locality details 2. Crags, S. end of Porth-my-nawyd.
50k map sheet St. Davids (209)

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Map reference
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


E7253

Cross Polarized, E7253

Plane Polarized, E7253

Plane Polarized, E7253