BGS mineralogy and petrology collection record

Sample number	E38727; COLLNOCE20;
Sample Donor	Evans,C.D.R.
Rock name	'Original entry: Tuff'
Stratigraphy	Not entered
Comments	Tuff of S.V Series. muddy rock with mudstone blocks in Upper Rhyolite
Locality details	380 yds 190 deg from Dolwyddelan Castle
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View the geology near 'Snowdon'
Map reference	SH 7215 5209
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.