BGS mineralogy and petrology collection record

Sample number	E38743; COLLNOCE36;
Sample Donor	Evans,C.D.R.
Rock name	'Original entry: Tuff'
Stratigraphy	Not entered
Comments	Top of the coarse tuff at base of Lower Rhyolitic Tuffs
Locality details	530 yds 3 deg from Tyn y Ddol Qry.
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View the geology near 'Snowdon'
Map reference	SH 7009 5188
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.