BGS mineralogy and petrology collection record

Sample number E64349; COLLNOKB1349;
Sample Donor Not entered
Rock name Rhyolite. 'Original entry: Rhyolite (Gamallt)'
Stratigraphy Not entered
Comments Loose block. XR PM 1(GROUP= )(FORM= )(MEMB= .)(IE=)(TEXTURE=Brecciated
Locality details Cwm Penmachno - stream section
50k map sheet Snowdon (119)

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Map reference SH 7507 4664
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, E64349

Plane Polarized, E64349

Plane Polarized, E64349