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	wtr	---	water	---
	Qa	Holocene	alluvium	---
	Qd	Holocene	dune sand	---
	Qls	Holocene	mass-wasting deposits, mostly landslides	---
	Qp	Holocene	peat deposits	---
	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
	Qoa	Pleistocene	alluvium, older	---
	Ec	Eocene	continental sedimentary deposits or rocks	---
	Ec(k)	Eocene	continental sedimentary deposits or rocks	Klondike Mountain Formation
	Ec(o)	Eocene	continental sedimentary deposits or rocks	O'Brien Creek Formation
	Ecg	Eocene	continental sedimentary deposits or rocks, conglomerate	---
	Eian	Eocene	intrusive andesite	---
	Eian(o)	Eocene	intrusive andesite	Oroville, trachyandesite plugs near
	Eid	Eocene	diorite	---
	Eida	Eocene	intrusive dacite	---
	Eimd(s)	Eocene	monzodiorite	Swimptkin Creek pluton
	Ev	Eocene	volcanic rocks	---
	Evc(a)	Eocene	volcaniclastic deposits or rocks	Antoine Creek, volcaniclastic rocks of
	Evc(o)	Eocene	volcaniclastic deposits or rocks	Oroville, volcaniclastic rocks near
	Evd	Eocene	dacite flows	---
	Evd(s)	Eocene	dacite flows	Sanpoil Volcanics
	Evdv(k)	Eocene	dacite and andesite flows, vitrophyric	Klondike Mountain Formation
	Evt	Eocene	tuffs and tuff breccias	---
	EPAia(b)	Eocene-Paleocene	acidic intrusive rocks	Mount Bonaparte pluton, Keller Butte suite
	EPAia(m)	Eocene-Paleocene	acidic intrusive rocks	Moses pluton, Keller Butte suite
	EPAiaa(b)	Eocene-Paleocene	alaskite-aplite-pegmatite	Mount Bonaparte pluton
	EPAid(b)	Eocene-Paleocene	diorite	Mount Bonaparte pluton
	TKik	Tertiary-Cretaceous	alkalic intrusive rocks	---
	pTbg(t)	pre-Tertiary	banded gneiss	Tonasket Gneiss
	pTbg(tm)	pre-Tertiary	banded gneiss	Tonasket Gneiss, mesocratic
	pTgn	pre-Tertiary	gneiss	---
	pTmb	pre-Tertiary	marble	---
	pTog(a)	pre-Tertiary	orthogneiss	Anglin, orthogneiss of
	pTog(c)	pre-Tertiary	orthogneiss	Crawfish Lake, tonalite gneiss of
	pTog(m)	pre-Tertiary	orthogneiss	Mission Creek, gneissic granodiorite of
	pTsc	pre-Tertiary	schist, high grade	---
	Kia(a)	Cretaceous	acidic intrusive rocks	Aeneas Creek pluton
	Kia(b)	Cretaceous	acidic intrusive rocks	Bottle Spring pluton
	Kia(cb)	Cretaceous	acidic intrusive rocks	Cathedral batholith
	Kia(e)	Cretaceous	acidic intrusive rocks	Evans Lake pluton
	Kid(a)	Cretaceous	diorite	Aeneas Creek pluton
	Kigd(c)	Cretaceous	granodiorite	Conconully, granodiorite of, main phase
	Kiq(l)	Cretaceous	quartz diorite	Lone Frank pluton
	Kiqm(h)	Cretaceous	quartz monzonite	Horseshoe Mountain pluton
	KJia(w)	Cretaceous-Jurassic	acidic intrusive rocks	Whisky Mountain pluton
	KJid(b)	Cretaceous-Jurassic	diorite	Buckhorn Mountain pluton
	KJigb(g)	Cretaceous-Jurassic	gabbro	Goat gabbro
	KJigd(a)	Cretaceous-Jurassic	granodiorite	Anderson Creek pluton
	KJigd(b)	Cretaceous-Jurassic	granodiorite	Buckhorn Mountain pluton
	KJigd(d)	Cretaceous-Jurassic	granodiorite	Dunn Mountain pluton
	KJigd(w)	Cretaceous-Jurassic	granodiorite	Wauconda pluton
	KJii(s)	Cretaceous-Jurassic	intermediate intrusive rocks	Silver Nail Lake pluton
	KJii(w)	Cretaceous-Jurassic	intermediate intrusive rocks	Whisky Mountain pluton
	KJiq(b)	Cretaceous-Jurassic	quartz diorite	Bowers, quartz diorite of
	KJmi(t)	Cretaceous-Jurassic	mixed metamorphic and igneous rocks	Tiffany Mountain, gneissic trondhjemite of
	KJmi(tx)	Cretaceous-Jurassic	mixed metamorphic and igneous rocks	Tiffany complex
	KJog(l)	Cretaceous-Jurassic	orthogneiss	Leader Mountain, granodioritic gneiss of
	KJog(w)	Cretaceous-Jurassic	orthogneiss	Windy Peak, orthogneiss near
	Jcg(e)	Jurassic	continental sedimentary deposits or rocks, conglomerate	Ellemeham Formation
	Jia(s)	Jurassic	acidic intrusive rocks	Similkameen pluton
	Jik(s)	Jurassic	alkalic intrusive rocks	Similkameen pluton
	Jik(sb)	Jurassic	alkalic intrusive rocks	Shankers Bend, alkalic complex of
	Jiqm(s)	Jurassic	quartz monzonite	S Fork, quartz monzonite of
	Jmi(n)	Jurassic	mixed metamorphic and igneous rocks	N Fork Camp, hybrid gneiss of
	Jmv(e)	Jurassic	metavolcanic rocks	Ellemeham Formation
	JTRigd(b)	Jurassic-Triassic	granodiorite	Blue Goat pluton
	JTRigd(l)	Jurassic-Triassic	granodiorite	Loomis pluton
	JTRog(t)	Jurassic-Triassic	orthogneiss	Tillman Mountain, tonalitic gneiss of
	pJhm(c)	pre-Jurassic	heterogeneous metamorphic rocks	Conconully, metamorphic complex of
	pJhm(tc)	pre-Jurassic	heterogeneous metamorphic rocks	Toats Coulee Creek, heterogeneous metamorphic rocks of
	pJmb(c)	pre-Jurassic	marble	Conconully, metamorphic complex of
	TRcb(c)	Triassic	metacarbonate	Cave Mountain Formation
	TRib(m)	Triassic	basic intrusive rocks	Mud Lake, metagabbro and amphibolite of
	TRmm(c)	Triassic	marine metasedimentary rocks	Cave Mountain Formation
	TRmm(cx)	Triassic	marine metasedimentary rocks	Conconully, metamorphic complex of
	TRmv(c)	Triassic	metavolcanic rocks	Cave Mountain Formation
	TRog(o)	Triassic	orthogneiss	Osoyoos, orthogneiss of
	TRPMib	Traissic-Permian	basic intrusive rocks	---
	TRPMib(c)	Triassic-Permian	basic intrusive rocks	Chopaka intrusive complex
	TRPMmt(k)	Triassic-Permian	metasedimentary and metavolcanic rocks	Kobau Formation
	TRPMmv(p)	Triassic-Permian	metavolcanic rocks	Palmer Mountain Greenstone
	TRPMu(c)	Triassic-Permian	ultrabasic rocks	Chopaka intrusive complex
	MZi	Mesozoic	intrusive rocks, undivided	---
	MZia	Mesozoic	acidic intrusive rocks	---
	MZog(ll)	Mesozoic	orthogneiss	Lemansky Lake, meta-quartz diorite of
	MZog(s)	Mesozoic	orthogneiss	Salmon Creek, granodioritic gneiss of
	PMcb(s)	Permian	metacarbonate	Spectacle Formation, Anarchist Group
	PMmm(a)	Permian	marine metasedimentary rocks	Anarchist Group
	PMmm(b)	Permian	marine metasedimentary rocks	Bullfrog Mountain Formation, Anarchist Group
	PMmm(s)	Permian	marine metasedimentary rocks	Spectacle Formation, Anarchist Group
	PMmv(s)	Permian	metavolcanic rocks	Spectacle Formation, Anarchist Group
	PZmm	Paleozoic	marine metasedimentary rocks	---