BGS mineralogy and petrology collection record

Sample number	MR841
Sample Donor	Rutley, J
Rock name	'Original entry: Sphentitic Felsite'
Stratigraphy	Not entered
Comments	See Geol. Jnl for 1879. Bala. B/183
Locality details	Y-Glyder Fawr, 100 ft above main road, Llanberis Pass, Carnarvonshire
50k map sheet	Bangor (106) View images in GeoScenic related to 'Bangor' View the geology near 'Bangor'
Map reference	SH 631 568
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions