IODP SEDIS - Thesaurus -

Tongue River
RT	North Dakota
	Montana
	Wyoming
	Yellowstone River
SN	Tributary of the Yellowstone River, N central Wyoming and SE Montana. Also a tributary of the Pembina River, NE North Dakota. Indexed with counties and states as applicable. Added to Thesaurus in 1985.

Tongue River Member
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Paleocene
	.....Tongue River Member
RT	Wyoming
	Montana
	North Dakota
	South Dakota
	Fort Union Formation
SN	In Fort Union Formation. In Montana and North Dakota, composed of light-yellow, tan, and gray sandstones and shales; thin lenses of limestone; and numerous beds of lignite. Found in E Montana, SW North Dakota, South Dakota and NW Wyoming.