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 a geological map near 'Harlech'
Map reference	SH 714 364
Year collected	1964
Bore name	Not applicable
Confidentiality	No restrictions