Picture Gorge Basalt  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....Picture Gorge Basalt
RTOregon
 middle Miocene
 Columbia Plateau
 Columbia River Basalt Group
 Grande Ronde Basalt
SNMiocene. NE Oregon. In Columbia River Basalt Group. May be considered part of Grande Ronde Basalt. Added to Thesaurus in 1993.