BGS mineralogy and petrology collection record

Sample number	MR21631
Sample Donor	Chaperlin,K.
Rock name	'Original entry: Slate'
Stratigraphy	Ordovician. Ordovician.
Comments	Dark grey Slate. NGR as in register.
Locality details	Quarry name: not recorded: at Disused Qry. 200 yd NW of Four Crosses, 2.7 ml SW of Amlwch Church
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View a geological map near 'Holyhead'
Map reference	SH 418 898
Year collected	1958
Bore name	Not applicable
Confidentiality	No restrictions