Locality	Layer
	Great Britain, England,Lancashire, Dinckley, River Ribble	P2 unrecorded
	USA, Arkansas, Independence Co., Buffalo Wallow 2 mls S of Moorefield	Ruddel Shale of Moorefield Fm.
	USA, Illinois, St.Clair Co., Hecker	Beech Creek Limestone
	USA, Kentucky, Rockcastle Co., Crab Orchard	Newman Fm.
	USA, Texas, Culberson Co., Sierra Diablo	Helms Fm.
	USA, Utah, Millard Co., Confusion Range, Chainman	Chainman Shale
	USA, Utah, Millard Co., Cowboy Pass area, Skunk spring	Chainman Shale