BGS mineralogy and petrology collection record

Sample number	E30774; COLLNOA254;
Sample Donor	Blake,J.F.
Rock name	Not entered
Stratigraphy	Not entered
Comments	No.3
Locality details	Penrhyn Quarry., ca 1 mile S of Bethesda. Water Tunnel
50k map sheet	Bangor (106) View images in GeoScenic related to 'Bangor' View a geological map near 'Bangor'
Map reference	SH 62 65
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.