Frenchman Springs Member  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....Frenchman Springs Member
RTWashington
 Oregon
 Columbia River Basalt Group
 Wanapum Basalt
SNOf Wanapum Basalt, which is part of the Columbia River Basalt Group. S and central Washington and NW Oregon. Added to Thesaurus in 1989.