BGS mineralogy and petrology collection record

Sample number	MR853
Sample Donor	Butler
Rock name	'Original entry: Riebeckite Microgranite'
Stratigraphy	Not entered
Comments	Intrusive into Bala
Locality details	Mynydd Mawr, Llyn Cwellyn Caernarvonshire
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View the geology near 'Snowdon'
Map reference	SH 540 548
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions