BGS mineralogy and petrology collection record

Sample number E67340
Sample Donor Rushton,A.A.
Rock name Rhyodacite.
Stratigraphy Not entered
Comments Rhyodacite
Locality details Gilfach Farm No. 2 BH. 1 Km 324 deg from Gilfach Fm. 2.5 Km N of Llanwrtyd Wells
50k map sheet Builth (196)

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Map reference SN 8760 4920
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


Cross Polarized, E67340

Plane Polarized, E67340

Plane Polarized, E67340