BGS mineralogy and petrology collection record

Sample number	E27182; COLLNO11;
Sample Donor	Thomas,H.H.
Rock name	'Original entry: Mineral Sample'
Stratigraphy	Not entered
Comments	Dark patch. Sillimanite needles
Locality details	Tan-y-Grisiau (Qry), Ffestiniog
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View the geology near 'Snowdon'
Map reference	SH 680 450
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.