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	wtr	---	water	---
	Qf	Holocene	artificial fill, including modified land	---
	Qa	Holocene-Pleistocene	alluvium	---
	Qd	Holocene-Pleistocene	dune sand	---
	Ql	Holocene-Pleistocene	loess	Palouse Formation
	Qls	Holocene-Pleistocene	mass-wasting deposits, mostly landslides	---
	Qfg	Pleistocene	outburst flood deposits, gravel, late Wisconsin	Missoula, glacial Lake, deposits of
	Qfs	Pleistocene	outburst flood deposits, sand and silt, late Wisconsin	Missoula, glacial Lake, deposits of
	Qgd	Pleistocene	continental glacial drift, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgl	Pleistocene	glaciolacustrine deposits, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgo	Pleistocene	continental glacial outwash, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgt	Pleistocene	continental glacial till, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	PLMc(r)	Pliocene-Miocene	continental sedimentary deposits or rocks	Ringold Formation
	Mc(e)	Miocene, middle to upper	continental sedimentary deposits or rocks	Ellensburg Formation
	Mv(g)	Miocene, middle	basalt flows	Grande Ronde Basalt, Columbia River Basalt Group
	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(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
	Mv(wrf)	Miocene, middle	basalt flows	Roza & Frenchman Springs Members, Wanapum Basalt
	Eian	Eocene	intrusive andesite	---
	Eida	Eocene	intrusive dacite	---
	Eida(b)	Eocene	intrusive dacite	Banks Lake, hypabyssal dacite porphyry dikes near
	Eida(g)	Eocene	intrusive dacite	Goat Mountain, prophyry dike swarm of
	Eigd(cm)	Eocene	granodiorite	Cooper Mountain batholith, main phase
	Eimd	Eocene	monzodiorite	---
	Eir	Eocene	intrusive rhyolite	---
	Eitr	Eocene	intrusive trachyte	---
	EPAig(c)	Eocene-Paleocene	granite	Coffee Lake, granite of
	EPAig(s)	Eocene-Paleocene	granite	Swawilla Basin, granite of
	EPAigd	Eocene-Paleocene	granodiorite	---
	TKit(a)	Tertiary-Cretaceous	tonalite	Arbuckle Mountain, tonalite of
	Kbg(c)	Cretaceous	banded gneiss	Chelan complex
	Kigb(c)	Cretaceous	gabbro	Chelan complex, gabbro of
	Kmg(c)	Cretaceous	migmatite	Chelan complex, migmatite of the
	Kog(c)	Cretaceous	orthogneiss	Chelan complex
	Kogm(c)	Cretaceous	orthogneiss, mesocratic	Chelan complex
	KJmg(a)	Cretaceous-Jurassic	migmatite	Alta Lake, migmatite of
	KJog(cj)	Cretaceous-Jurassic	orthogneiss	Chief Joseph Dam, tonalite gneiss near
	pKam(c)	pre-Cretaceous	amphibolite	Chelan complex
	pKhm(a)	pre-Cretaceous	heterogeneous metamorphic rocks	Alta Lake, amphibolite,schist,&gneiss
	pKhm(c)	pre-Cretaceous	heterogeneous metamorphic rocks	Chelan complex
	pKhm(tm)	pre-Cretaceous	heterogeneous metamorphic rocks	Twentyfive Mile Creek, amphibolite and schist of
	pJhm(l)	pre-Jurassic	heterogeneous metamorphic rocks	Leahy, metamorphic rocks east of
	MZmg(g)	Mesozoic	migmatite	Gibraltar Rock, migmatitic granodiorite of