Locality	Layer
	Russian Federation, Moscow Basin, Afanas'evo quarry	Ratmirov Fm.
	USA, Oklahoma, Okfuskee Co., Okfuskee, OKM-12	Coffeyville Fm., basal Tacket shale bed
	USA, Oklahoma, Tulsa Co., Collinsville, S of, T.22N., R.14E.	Seminole Fm., just above Dawson coal