BGS mineralogy and petrology collection record

Sample number E63268; COLLNOKB268;
Sample Donor Not entered
Rock name Rhyodacite. 'Original entry: Feldspar Porphyry Composite'
Stratigraphy Not entered
Comments 4m from contact with dolerite, composite sill(GROUP= )(FORM= )(MEMB= .)(IE=I)(TEXTURE=Spherulitic, porph.
Locality details Nant Mor/Croesor
50k map sheet Snowdon (119)

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Map reference SH 6310 4523
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, E63268

Plane Polarized, E63268

Plane Polarized, E63268