Locality	Layer
	USA, Oklahoma, Okfuskee Co., Okfuskee, OKM-12	Coffeyville Fm., basal Tacket shale bed
	USA, Texas, Brewster Co., Beckwith Hills, TX MAR M1	Gaptank Fm., unrecognized
	USA, Texas, Brewster Co., Lenox, 4.5 mls ESE of	Gaptank Fm., upper part (?)