IODP SEDIS - Thesaurus -

Calvert Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Miocene
	.....middle Miocene
	......Calvert Formation
RT	Virginia
	Maryland
	Delaware
	Chesapeake Group
SN	In Chesapeake Group. Delaware, E Maryland, and Virginia.