CLICK ON A COLORED AREA OF THE GEOLOGY MAP TO SHOW INFORMATION HERE
	wtr	---	water	---
	Qa	Quaternary	alluvium	---
	Qaf	Quaternary	alluvial fan deposits	---
	Qafo	Quaternary	alluvial fan deposits, older	---
	Ql	Quaternary	loess	Palouse Formation
	Qls	Quaternary	mass-wasting deposits, mostly landslides	---
	Qt	Quaternary	terraced deposits	---
	Qfs(t)	Pleistocene	outburst flood deposits, late Wisconsin	Touchet Beds, glacial Lake Missoula
	QPLcg	Pleistocene-Pliocene	continental sedimentary deposits, conglomerate	---
	QPLvb(s)	Pleistocene-Pliocene	basalt flows	Simcoe Mountains, volcanic rocks of
	QPLvd(s)	Pleistocene-Pliocene	dacite flows	Simcoe Mountains, volcanic rocks of
	QPLvr(s)	Pleistocene-Pliocene	rhyolite flows	Simcoe Mountains, volcanic rocks of
	Mcg(e)	Miocene, upper	continental sedimentary deposits, conglomerate	Ellensburg Formation
	Mv(sem)	Miocene, upper	basalt flows	Elephant Mountain Member, Saddle Mountains Basalt
	Mc(e)	Miocene, mid-upper	continental sedimentary deposits, conglomerate	Ellensburg Formation
	Mv(gN2)	Miocene, middle	basalt flows	Grande Ronde Basalt, N2 (upper flows of norm.mag.pol.)
	Mv(gR2)	Miocene, middle	basalt flows	Grande Ronde Basalt, R2 (upper flows of rev.mag.pol.)
	Mv(sp)	Miocene, middle	basalt flows	Pomona Member, Saddle Mountains Basalt
	Mv(su)	Miocene, middle	basalt flows	Umatilla Member, Saddle Mountains Basalt
	Mv(wfs)	Miocene, middle	basalt flows	Frenchman Springs Member, Wanapum Basalt
	Mv(wpr)	Miocene, middle	basalt flows	Priest Rapids Member, Wanapum Basalt
	Mv(wr)	Miocene, middle	basalt flows	Roza Member, Wanapum Basalt