BGS mineralogy and petrology collection record

Sample number	E26941; COLLNOFD51;
Sample Donor	Dunning,F.W.
Rock name	Not entered
Stratigraphy	Not entered
Comments	Slate enclosure in Rhyolite Tuff, Basal Bed of Upper Tuff Bed (B2)
Locality details	S end of Central Wall, Reservoir 200 yds. S of Bwlch-Y-Gwynt
50k map sheet	Bangor (106) View images in GeoScenic related to 'Bangor' View a geological map near 'Bangor'
Map reference	SH 775 601
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.