IODP SEDIS - Thesaurus -

Grande Ronde Basalt
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Miocene
	.....Grande Ronde Basalt
RT	Idaho
	Washington
	lower Miocene
	Oregon
	middle Miocene
	Hanford Reservation
	Picture Gorge Basalt
	Columbia River Basalt Group
	Yakima Basalt
SN	SE Washington, Oregon and W Idaho. Lower to middle Miocene. Has been considered part of the Yakima Basalt of the Columbia River Basalt Group. Indexed with ages as applicable. Added to Thesaurus in 1985.