BGS mineralogy and petrology collection record

Sample number	E63250; COLLNOKB250;
Sample Donor	Not entered
Rock name	Rhyolite. 'Original entry: Rhyolite'
Stratigraphy	Not entered
Comments	Dome overling acid tuff, part intrusive(GROUP= Snowdon Volcanic Group)(FORM= Upper Rhyolitic Tuff Fm.)(MEMB= .)(IE=E)(TEXTURE=Much sulphide
Locality details	Gallt y Wenallt
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View a geological map near 'Snowdon'
Map reference	SH 6390 5343
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.