BGS mineralogy and petrology collection record

Sample number E53290; E53290/A; E53290/B; COLLNOLA880;
Sample Donor Allen,P.M.
Rock name Not entered
Stratigraphy Not entered
Comments Acid volcanic
Locality details Treffynnon No. 6 BH, 250 m 45 deg from Treffynnon Chapel
50k map sheet St. Davids (209)

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Map reference SM 8486 2875
Year collected Not entered 
Bore name Treffynnon Chapel
Confidentiality No restrictions

Petrological thin sections

Links to high resolution images

Transition from XPL to PPL light


E53290/A

Cross Polarized, E53290/A

Plane Polarized, E53290/A

Plane Polarized, E53290/A


E53290/B

Cross Polarized, E53290/B

Plane Polarized, E53290/B

Plane Polarized, E53290/B