BGS mineralogy and petrology collection record

Sample number	E39355; COLLNOCE109;
Sample Donor	Evans,C.D.R.
Rock name	'Original entry: Tuff'
Stratigraphy	Not entered
Comments	Section up Lower Rhyolite Tuff; 54 ft above Base of Unit.
Locality details	1520 ft 185 deg E of N of Dolwyddelan Castle
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View the geology near 'Snowdon'
Map reference	SH 7214 5186
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.