IODP SEDIS - Thesaurus -

Eau Claire Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Upper Cambrian
	.....Eau Claire Formation
RT	Iowa
	Illinois
	Indiana
	Ohio
	Wisconsin
	Minnesota
	Michigan
SN	NE Illinois, Indiana, Iowa, W Michigan, SE Minnesota, SW Ohio and W Wisconsin. Added to Thesaurus in 1989.