Locality	Layer
	USA, Texas, Brewster Co., Arnold's Ranch, 1.75 mls S of	Gaptank Fm., upper part
	USA, Texas, Brewster Co., Marathon, 4 mls W of	Gaptank Fm., upper part
	USA, Texas, Brewster Co., Wolf Camp, 5 mls NE of, Glass Mts.	Gaptank Fm., near top
	USA, Texas, Wise Co., Bridgeport, Br. Brick Co. clay pit	Graford Fm.