BGS mineralogy and petrology collection record

Sample number E63338; COLLNOKB338;
Sample Donor Not entered
Rock name Rhyodacite. 'Original entry: Feldspar Porphyry Composite'
Stratigraphy Not entered
Comments From 4m acid centre of comp sill as KB337(GROUP= )(FORM= )(MEMB= .)(IE=I)(TEXTURE=
Locality details Bwlch y rhydd
50k map sheet Snowdon (119)

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Map reference SH 6658 4586
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


E63338

Cross Polarized, E63338

Plane Polarized, E63338

Plane Polarized, E63338