IODP SEDIS - Thesaurus -

Pierre Shale
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Pierre Shale
RT	Wyoming
	Montana
	Colorado
	Nebraska
	North Dakota
	Minnesota
	South Dakota
	Montana Group
	Gammon Ferruginous Member
	Sharon Springs Member
SN	In Montana Group. E Colorado, W Minnesota, E Montana, Nebraska, North Dakota, South Dakota, and E Wyoming.