IODP SEDIS - Thesaurus -

Maquoketa Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Upper Ordovician
	.....Maquoketa Formation
RT	Iowa
	Missouri
	Illinois
	Wisconsin
	Minnesota
SN	In Missouri, it is typically thin laminated shale interbedded with shaly limestone members. W Illinois, E Iowa, S Minnesota, E Missouri, and SW Wisconsin.