BGS mineralogy and petrology collection record

Sample number	E25318; COLLNO4;
Sample Donor	Archer,A.A.
Rock name	Wacke. 'Original entry: Greywacke'
Stratigraphy	Not entered
Comments	Not entered
Locality details	Cwm Ystradllynn, nr NE of Cwm-y-Fedw
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View a geological map near 'Snowdon'
Map reference	SH 560 415
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.