Locality	Layer
	Belgium, Liège, Saive	R1a3
	Germany, Rhenish Mountains, Langerwehe, Gerhardine Stollen	R2c
	Great Britain, England,Yorkshire, Bradfield, Rocher End Brook	R2
	Great Britain, England,Yorkshire, Sugworth, S end of Strines reservoir	R2
	Ireland, Cavan Co., Kingscourt, Monaghan Coalfield	R2