BGS mineralogy and petrology collection record

Sample number	MR27143; COLLNODAN573;
Sample Donor	Dangerfield,J.; Merriman,R.J.;
Rock name	'Original entry: Hornfels'
Stratigraphy	Not entered
Comments	Lingula flags altered by dolerite.
Locality details	Craig-y-tan quarry: at 200 yds due N of Trawsfyneydd station Merioneth
50k map sheet	Harlech (135) View images in GeoScenic related to 'Harlech' View the geology near 'Harlech'
Map reference	SH 714 364
Year collected	1964
Bore name	Not applicable
Confidentiality	No restrictions