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	wtr	---	water	---
	Qa	Holocene-Pleistocene	alluvium	---
	Ql	Holocene-Pleistocene	loess	Palouse Formation
	Qls	Holocene-Pleistocene	mass-wasting deposits, mostly landslides	---
	Qs	Holocene-Pleistocene	sedimentary deposits or rocks	---
	Qgd	Pleistocene	continental glacial drift, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgl(n)	Pleistocene	glaciolacustrine deposits, Fraser-age	Nespelem Silt
	Qglf(n)	Pleistocene	glaciolacustrine and outburst flood deposits, undivided, Fraser-age	Nespelem Silt
	Qgo	Pleistocene	continental glacial outwash, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgpt	Pleistocene	continental glacial till, pre-Fraser	---
	Qgt	Pleistocene	continental glacial till, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Mv(gN2)	Miocene, middle	basalt flows	Grande Ronde Basalt, N2 (upper flows of norm.mag.pol.)
	Mv(wpr)	Miocene, middle	basalt flows	Priest Rapids Member, Wanapum Basalt
	Ec(o)	Eocene	continental sedimentary deposits, conglomerate	O'Brien Creek Formation
	Eid(l)	Eocene	diorite	Little Moses Mountain, diorite of
	Eida	Eocene	intrusive dacite	---
	Eig(dh)	Eocene	granite	Deadhorse Creek, granite of
	Eig(gm)	Eocene	granite	Granite Mountain pluton
	Eig(s)	Eocene	granite	Stepstone Creek, varied granite near
	Eigd(j)	Eocene	granodiorite	Joe Moses Creek, granodiorite of
	Eimd(d)	Eocene	monzodiorite	Devils Elbow suite
	Eimd(k)	Eocene	monzodiorite	Kettle Crest pluton, Devils Elbow suite
	Eiqm(f)	Eocene	quartz monzonite	Fire Mountain pluton
	Eir(w)	Eocene	intrusive rhyolite	West Fork, intrusive rhyolite near
	Ev(sc)	Eocene	volcanic rocks	Cub Hill, rhyodacite of, Sanpoil Volcanics
	Evc(s)	Eocene	volcaniclastic deposits or rocks	Sanpoil Volcanics
	Evd(s)	Eocene	dacite flows	Sanpoil Volcanics
	Evs(s)	Eocene	volcanic and sedimentary rocks	Sanpoil Volcanics
	Evt(s)	Eocene	tuffs and tuff breccias	Sanpoil Volcanics
	EPAia(j)	Eocene-Paleocene	acidic intrusive rocks	Johnny George, plutonic complex of
	EPAia(mc)	Eocene-Paleocene	acidic intrusive rocks	Manila Creek,porphyritic granodiorite of,Keller Butte pluton
	EPAia(s)	Eocene-Paleocene	acidic intrusive rocks	Swawilla Basin, biotite granite of, Keller Butte pluton
	EPAiaa(mg)	Eocene-Paleocene	alaskite-aplite-pegmatite	McGinnis Lake, garnet-bearing granite of
	EPAiaa(mm)	Eocene-Paleocene	alaskite-aplite-pegmatite	Moses Mountain, varied granite of
	EPAig(cc)	Eocene-Paleocene	granite	Coyote Creek, porphyritic granite of
	EPAig(d)	Eocene-Paleocene	granite	Daisy Trail, granite of
	EPAig(kb)	Eocene-Paleocene	granite	Keller Butte pluton, porphyritic granite of
	EPAig(mc)	Eocene-Paleocene	granite	Meadow Creek, altered granite of
	EPAig(mm)	Eocene-Paleocene	granite	Moses Mountain, medium-grained granite of
	EPAig(mmf)	Eocene-Paleocene	granite	Moses Mountain, fine-grained granite of
	EPAig(mt)	Eocene-Paleocene	granite	Mount Tolman, quartz porphyry of, Keller Butte pluton
	TKia	Tertiary-Cretaceous	acidic intrusive rocks	---
	TKia(h)	Tertiary-Cretaceous	acidic intrusive rocks	Huckleberry Range, intrusive rocks in
	pTam	pre-Tertiary	amphibolite	---
	pTgn(h)	pre-Tertiary	gneiss	Hall Creek gneiss
	pThm(h)	pre-Tertiary	heterogeneous metamorphic rocks	Hall Creek gneiss
	pTog(d)	pre-Tertiary	orthogneiss	Deerhorn Creek, gneissic and mylonitic rocks of
	pTog(h)	pre-Tertiary	orthogneiss	Hall Creek gneiss
	pTqz(h)	pre-Tertiary	quartzite, high grade	Hall Creek gneiss
	pTsc	pre-Tertiary	schist, high grade	---
	pTsc(h)	pre-Tertiary	schist, high grade	Hall Creek gneiss
	Kia(m)	Cretaceous	acidic intrusive rocks	Midnite mine pluton
	Kia(o)	Cretaceous	acidic intrusive rocks	Owl Creek, porphyry near
	Kig(g)	Cretaceous	granite	Germania mine, granite near the
	Kigd(f)	Cretaceous	granodiorite	Fruitland, granodiorite near
	KJia(bc)	Cretaceous-Jurassic	acidic intrusive rocks	Barnaby Creek, granodiorite of
	KJia(g)	Cretaceous-Jurassic	acidic intrusive rocks	Gold Creek, granodiorite near
	KJia(m)	Cretaceous-Jurassic	acidic intrusive rocks	Meteor, granite and granodiorite near
	KJid(s)	Cretaceous-Jurassic	diorite	Stepstone Creek, diorite of
	KJigd(r)	Cretaceous-Jurassic	granodiorite	Rogers Bar, granodiorite of
	pKid(n)	pre-Cretaceous	diorite	N Star Creek, metadiorite of
	pKigb(b)	pre-Cretaceous	gabbro	Bridge Creek, ultramafic and mafic bodies of
	pKigb(s)	pre-Cretaceous	gabbro	Stranger Creek, mafic intrusive rocks of
	MZPZu(p)	Mesozoic-Paleozoic	ultrabasic rocks	Parmenter Creek, serpentinite near
	PMmm	Permian	marine metasedimentary rocks	---
	COar	Carbon.-Ordovician	argillite	---
	COcb	Carbon.-Ordovician	metacarbonate	---
	COcg	Carbon.-Ordovician	continental sedimentary deposits, conglomerate	---
	COmm	Carbon.-Ordovician	marine metasedimentary rocks	---
	COmv	Carbon.-Ordovician	metavolcanic rocks	---
	COw	Carbon.-Ordovician	wacke	---
	Dcb	Devonian	metacarbonate	---
	Ocb(c)	Ordovician	metacarbonate	Covada Group
	Oigb	Ordovician	gabbro	---
	Omm(c)	Ordovician	marine metasedimentary rocks	Covada Group
	Omm(l)	Ordovician	marine metasedimentary rocks	Ledbetter Slate
	Omv(c)	Ordovician	metavolcanic rocks	Covada Group
	Ow(c)	Ordovician	wacke	Covada Group
	OCcb(m)	Ordovician-Cambrian	metacarbonate	Metaline Formation
	Cph(m)	Cambrian	phyllite, low grade	Maitlen Phyllite
	CZq(a)	Cambrian-Proterozoic	quartzite, low grade	Addy Quartzite
	PZar	Paleozoic	argillite	---
	PZcb	Paleozoic	metacarbonate	---
	PZhm	Paleozoic	heterogeneous metamorphic rocks	---
	PZmm	Paleozoic	marine metasedimentary rocks	---
	PZw	Paleozoic	wacke	---
	Zcg(h)	upper Proterozoic	continental sedimentary deposits, conglomerate	Huckleberry Formation, Windermere Group
	Zib	upper Proterozoic	basic intrusive rocks	---
	Zmv(h)	upper Proterozoic	metavolcanic rocks	Huckleberry Formation, greenstone member, Windermere Group
	Yar(b)	middle Proterozoic	argillite	Buffalo Hump Formation, Deer Trail Group
	Yar(m)	middle Proterozoic	argillite	McHale Slate, Deer Trail Group
	Yar(t)	middle Proterozoic	argillite	Togo Formation, Deer Trail Group
	Ycb(e)	middle Proterozoic	metacarbonate	Edna Dolomite, Deer Trail Group
	Ycb(s)	middle Proterozoic	metacarbonate	Stensgar Dolomite, Deer Trail Group
	Yq(b)	middle Proterozoic	quartzite, low grade	Buffalo Hump Formation, Deer Trail Group
	Yq(t)	middle Proterozoic	quartzite, low grade	Togo Formation, Deer Trail Group