BGS mineralogy and petrology collection record

Sample number E63374; COLLNOKB374;
Sample Donor Not entered
Rock name Rhyodacite. 'Original entry: Feldspar Porphyry Composite'
Stratigraphy Not entered
Comments Interior of comp sill 40m from contact see KB373(GROUP= )(FORM= )(MEMB= .)(IE=I)(TEXTURE=Coarse-grained
Locality details Croesor
50k map sheet Snowdon (119)

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Map reference SH 6199 4440
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, E63374

Plane Polarized, E63374

Plane Polarized, E63374