CLICK ON A COLORED AREA OF THE GEOLOGY MAP TO SHOW INFORMATION HERE
	wtr	---	water	---
	ice	Holocene	ice	---
	Qa	Holocene	alluvium	---
	Qls	Holocene	mass-wasting deposits, mostly landslides	---
	Qs	Holocene-Pleistocene	sedimentary deposits or rocks	---
	Qao	Pleistocene	alpine glacial outwash, Fraser-age	---
	Qgd	Pleistocene	continental glacial drift, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qoa	Pleistocene	alluvium, older	---
	Mit(cp)	Miocene	tonalite	Cloudy Pass Pluton and associated rocks
	Ec(i)	Eocene	continental sedimentary deposits or rocks	Island Mountain, volcanic rocks of
	Eian(g)	Eocene	intrusive andesite	Goat Wall, andesite(?) dikes near
	Eib(m)	Eocene	basic intrusive rocks	Middle Mountain, basalt of
	Eidaa	Eocene	intrusive dacite and andesite	---
	Eig(g)	Eocene	granite	Golden Horn batholith
	Eig(m)	Eocene	granite	Monument Peak stock
	Eigd(c)	Eocene	granodiorite	Castle Peak stock
	Eigd(l)	Eocene	granodiorite	Lost Peak stock
	Eiq(c)	Eocene	quartz diorite	Castle Peak stock
	Eir(dc)	Eocene	intrusive rhyolite	Diamond Creek, rhyolite dikes near
	Ev(i)	Eocene	volcanic rocks	Island Mountain, volcanic rocks of
	Eva(i)	Eocene	andesite flows	Island Mountain, volcanic rocks of
	PAKog(g)	Paleocene-Cretaceous	orthogneiss	Gabriel Peak, orthogneiss of
	TKi	Tertiary-Cretaceous	intrusive rocks, undivided	---
	TKi(h)	Tertiary-Cretaceous	intrusive rocks, undivided	Heather Creek, stock near
	TKib(c)	Tertiary-Cretaceous	basic intrusive rocks	Cathedral Creek, basalt dikes near
	TKida(r)	Tertiary-Cretaceous	intrusive dacite	Remmel Lake, dacite dikes near
	TKit(r)	Tertiary-Cretaceous	tonalite	Ruby Creek heterogeneous plutonic belt
	TKog(s)	Tertiary-Cretaceous	orthogneiss	Skagit Gneiss
	pTph(j)	pre-Tertiary	phyllite, low grade	Jack Mountain phyllite of Misch (1966)
	pTu	pre-Tertiary	ultrabasic rocks	---
	Kc(m)	Cretaceous	continental sedimentary deposits or rocks	Midnight Peak Formation
	Kc(w)	Cretaceous	continental sedimentary deposits or rocks	Winthrop Sandstone
	Kcg(v)	Cretaceous	continental sedimentary deposits or rocks, conglomerate	Virginian Ridge Formation
	Kian	Cretaceous	intrusive andesite	---
	Kid(lc)	Cretaceous	diorite	Lightning Creek stocks
	Kid(m)	Cretaceous	diorite	Middle Creek, diorite near
	Kig(p)	Cretaceous	granite	Park, granite stock of
	Kigb(a)	Cretaceous	gabbro	Ashnola Gabbro
	Kigd(cb)	Cretaceous	granodiorite	Cathedral batholith
	Kigd(p)	Cretaceous	granodiorite	Pasayten stock
	Kigd(r)	Cretaceous	granodiorite	Rock Creek stock
	Kii(f)	Cretaceous	intermediate intrusive rocks	Fawn Peak stock
	Kiqm(cb)	Cretaceous	quartz monzonite	Cathedral batholith
	Kiqm(e)	Cretaceous	quartz monzonite	Ewart Creek, quartz monzonite near
	Kit	Cretaceous	tonalite	---
	Kit(b)	Cretaceous	tonalite	Black Peak batholith
	Km(v)	Cretaceous	marine sedimentary rocks	Virginian Ridge Formation
	Kms(v)	Cretaceous	metasedimentary rocks	Virginian Ridge Formation, metamorphosed conglomerate of
	Kmv	Cretaceous	metavolcanic rocks	---
	Kog(e)	Cretaceous	orthogneiss	Eldorado Orthogneiss
	Ks(wv)	Cretaceous	sedimentary deposits or rocks	Winthrop Sandstone/Virginian Ridge Formation, undivided
	Kv(m)	Cretaceous	volcanic rocks	Midnight Peak Formation, volcanic member of
	Kvc(m)	Cretaceous	volcaniclastic deposits or rocks	Midnight Peak Formation
	Km(g)	Cretaceous, lower	marine sedimentary rocks	Goat Creek Formation
	Km(h)	Cretaceous, lower	marine sedimentary rocks	Harts Pass Formation
	Km(p)	Cretaceous, lower	marine sedimentary rocks	Panther Creek Formation
	Kva(i)	Cretaceous, lower	andesite flows	Isabella Ridge, andesite of
	Kvs(b)	Cretaceous, lower	volcanic and sedimentary rocks	Buck Mountain Formation
	KJit(b)	Cretaceous-Jurassic	tonalite	Bald Mountain, trondhjemite of
	KJit(d)	Cretaceous-Jurassic	tonalite	Doe Mountain, trondhjemite of
	KJmg(s)	Cretaceous-Jurassic	migmatite	Spanish Creek, migmatitic rocks near
	KJmi(t)	Cretaceous-Jurassic	mixed metamorphic and igneous rocks	Tiffany Mountain, gneissic trondhjemite of
	KJog(e)	Cretaceous-Jurassic	orthogneiss	Eightmile Creek, trondhjemite of
	KJog(lb)	Cretaceous-Jurassic	orthogneiss	Lamb Butte, trondhjemite of
	KJog(p)	Cretaceous-Jurassic	orthogneiss	Pasayten fault, mylonitic gneiss along the
	KJogm(r)	Cretaceous-Jurassic	orthogneiss, mesocratic	Ramsey Creek, metagabbro near
	KJvs(n)	Cretaceous-Jurassic	volcanic and sedimentary rocks	Newby Group
	Jit(b)	Jurassic	tonalite	Button Creek stock
	Jm(l)	Jurassic	marine sedimentary rocks	Ladner Group
	Jm(t)	Jurassic	marine sedimentary rocks	Twisp Formation
	JPMmt(h)	Jurassic-Permian	metasedimentary and metavolcanic rocks	Hozameen Group
	pJam(s)	pre-Jurassic	amphibolite	Sheep Mountain area, hornblende gneisses of the
	pJbg(q)	pre-Jurassic	banded gneiss	Quartz Mountain area, granodiorite gneiss of
	TRpg(c)	Triassic	paragneiss	Cascade River unit, Chelan Mountains terrane
	TRpg(s)	Triassic	paragneiss	Skagit Gneiss
	TRPMhmc(n)	Triassic-Permian	heterogeneous metamorphic rocks, chert bearing	Napeequa unit, Chelan Mtns. terr., Napeequa Schist