BGS mineralogy and petrology collection record

Sample number	E64350; COLLNOKB1350;
Sample Donor	Not entered
Rock name	Rhyolite. 'Original entry: Rhyolite (Gamallt)'
Stratigraphy	Not entered
Comments	Weathered and silicified, carbonate rich. XR PM 2(GROUP= )(FORM= )(MEMB= .)(IE=)(TEXTURE=
Locality details	Penmachno slate quarry
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View the geology near 'Snowdon'
Map reference	SH 7520 4657
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.