CLICK ON A COLORED AREA OF THE GEOLOGY MAP TO SHOW INFORMATION HERE
	wtr	---	water	---
	ice	Holocene	ice	---
	Qa	Holocene	alluvium	---
	Qaf	Holocene	alluvial fan deposits	---
	Qls	Holocene	mass-wasting deposits, mostly landslides	---
	Qls(i)	Holocene	mass-wasting deposits	incipient blockslides
	Qp	Holocene	peat deposits	---
	Qta	Holocene	talus deposits	---
	Qvb(wc)	Holocene	basalt flows	White Chuck cinder cone, Glacier Peak
	Qvl(s)	Holocene	lahars	Suiattle fill deposits, Glacier Peak
	Qvp(gp)	Holocene	pyroclastic flows	Glacier Peak, volcanic rocks of
	Qa(m)	Holocene-Pleistocene	alluvium	alluvium and mass-wasting deposits, undivided
	Qad	Holocene-Pleistocene	alpine glacial drift, Fraser-age	---
	Qls(m)	Holocene-Pleistocene	mass-wasting deposits, other than landslides	mass-wasting deposits, other than landslides
	Qoa	Holocene-Pleistocene	alluvium, older	---
	Qva(lc)	Holocene-Pleistocene	andesite flows	Lightning Creek, andesite at, Glacier Peak
	Qvd(g)	Holocene-Pleistocene	dacite flows	Glacier Peak, volcanic rocks of
	Qvd(gd)	Holocene-Pleistocene	dacite flows	Glacier Peak, dacite of Disappointment Peak
	Qvd(go)	Holocene-Pleistocene	dacite flows	Glacier Peak, older flows of
	Qvd(gy)	Holocene-Pleistocene	dacite flows	Glacier Peak, younger flows of
	Qvl(gp)	Holocene-Pleistocene	lahars	Glacier Peak, volcanic rocks of
	Qvl(w)	Holocene-Pleistocene	lahars	White Chuck fill, Glacier Peak volcanic rocks
	Qvt(w)	Holocene-Pleistocene	tuffs and tuff breccias	White Chuck fill, Glacier Peak volcanic rocks
	Qga	Pleistocene	advance continental glacial outwash, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qga(tb)	Pleistocene	advance continental glacial outwash, Fraser-age	transitional beds of Booth (1989)
	Qgo	Pleistocene	continental glacial outwash, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgo(i)	Pleistocene	continental glacial outwash, Fraser-age	ice-contact recessional outwash
	Qgos(s)	Pleistocene	continental glacial outwash, sand, Fraser-age	Stillaguamish Sand Member, Vashon Drift
	Qgpc	Pleistocene	glacial drift, pre-Fraser, and nonglacial deposits	---
	Qgt	Pleistocene	continental glacial till, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	PLcg(g)	Pliocene	continental sedimentary deposits, conglomerate	Gamma Ridge, volcanic rocks of
	PLida(c)	Pliocene	intrusive dacite	Cool Glacier stock
	PLigd(c)	Pliocene	granodiorite	Cool Glacier stock
	PLix(c)	Pliocene	intrusive breccia	Cool Glacier stock
	PLv(g)	Pliocene	volcanic rocks	Gamma Ridge, volcanic rocks of
	PLvd(g)	Pliocene	dacite flows	Gamma Ridge, volcanic rocks of
	Mig(c)	Miocene	granite	Cloudy Pass batholith and associated rocks
	Migd(c)	Miocene	granodiorite	Cloudy Pass batholith and associated rocks
	Migd(cd)	Miocene	granodiorite	Cloudy Pass batholith, dark-colored rocks of
	Mit(b)	Miocene	tonalite	Mount Buckindy pluton
	Mit(c)	Miocene	tonalite	Cascade Pass, tonalite of
	Mit(cp)	Miocene	tonalite	Cloudy Pass Pluton and associated rocks
	Mit(d)	Miocene	tonalite	Downey Mountain stock
	Mix(b)	Miocene	intrusive breccia	Mount Buckindy pluton
	Mix(c)	Miocene	intrusive breccia	Cascade Pass dike
	Mix(cp)	Miocene	intrusive breccia	Cloudy Pass batholith and associated rocks
	Mvdb(r)	Miocene	dacite and andesite flows, breccia	Round Lake, breccia of
	MOigd(d)	Miocene-Oligocene	granodiorite	Dead Duck pluton, Grotto Batholith
	MOigd(m)	Miocene-Oligocene	granodiorite	Monte Cristo stock, Grotto Batholith
	Oiq(s)	Oligocene	quartz diorite	Squire Creek stock at Granite Lakes
	Oit(s)	Oligocene	tonalite	Squire Creek stock and related rocks
	Oit(ss)	Oligocene	tonalite	Shake Creek stock of Squire Creek stock
	Oit(sv)	Oligocene	tonalite	Squire Creek stock on Vesper Peak
	OEc	Oligocene-Eocene	continental sedimentary deposits, conglomerate	---
	OEida(s)	Oligocene-Eocene	intrusive dacite	Sauk ring dike of Squire Creek stock
	OEn	Oligocene-Eocene	nearshore sedimentary rocks	---
	Ec	Eocene	continental sedimentary deposits, conglomerate	Bald Mountain, sedimentary rocks on S side of
	Ec(b)	Eocene	continental sedimentary deposits, conglomerate	Barlow Pass Volcanics
	Ec(s)	Eocene	continental sedimentary deposits, conglomerate	Straight Creek Fault, unnamed rocks along the
	Eig(p)	Eocene	granite	Mount Pilchuck stock
	Eigb(b)	Eocene	gabbro	Barlow Pass Volcanics
	Eigd(g)	Eocene	granodiorite	Granite Falls stock and associated plutons
	Ev(b)	Eocene	volcanic rocks	Barlow Pass Volcanics
	Evb(b)	Eocene	basalt flows	Barlow Pass Volcanics
	Evr(b)	Eocene	rhyolite flows	Barlow Pass Volcanics
	Evr(h)	Eocene	rhyolite flows	Hansen Lake, rhyolite of
	Evs(b)	Eocene	volcanic and sedimentary rocks	Barlow Pass Volcanics
	pTigd(b)	pre-Tertiary	granodiorite	Bald Mountain pluton
	pTigd(bs)	pre-Tertiary	granodiorite	Bald Mountain pluton, sills
	pTmv(h)	pre-Tertiary	metavolcanic rocks	Helena Haystack melange
	Kbg(bl)	Cretaceous	banded gneiss	Bench Lake, tonalitic gneiss of
	Kbg(n)	Cretaceous	banded gneiss	Nason Ridge Migmatitic Gneiss
	Khm(c)	Cretaceous	heterogeneous metamorphic rocks	Chaval pluton
	Khm(cs)	Cretaceous	heterogeneous metamorphic rocks	Chaval pluton, sills and dikes of
	Kid(h)	Cretaceous	diorite	Hardtack Lake, metadiorite at
	Kigd(cl)	Cretaceous	granodiorite	Cyclone Lake pluton
	Kigd(d)	Cretaceous	granodiorite	Downey Creek, sill complex of
	Kigd(fc)	Cretaceous	granodiorite	Foam Creek stock
	Kigd(hl)	Cretaceous	granodiorite	Hidden Lake stock
	Kigd(j)	Cretaceous	granodiorite	Jordan Lakes pluton
	Kigd(su)	Cretaceous	granodiorite	Sulphur Mountain pluton
	Kiq(ch)	Cretaceous	quartz diorite	Chaval pluton
	Kit(g)	Cretaceous	tonalite	Grassy Point stock
	Kog(bl)	Cretaceous	orthogneiss	Bench Lake, tonalitic gneiss of
	Kog(e)	Cretaceous	orthogneiss	Eldorado Orthogneiss
	Kog(ef)	Cretaceous	orthogneiss	Eldorado Orthogneiss, flaser gneiss
	Kog(sc)	Cretaceous	orthogneiss	Sloan Creek plutons
	Kog(su)	Cretaceous	orthogneiss	Sulphur Mountain pluton
	Kog(tc)	Cretaceous	orthogneiss	Tenpeak pluton, contact zone of
	Kog(td)	Cretaceous	orthogneiss	Tenpeak pluton, dark-colored rocks of
	Kog(tf)	Cretaceous	orthogneiss	Tenpeak pluton, flaser gneiss of
	Kog(ti)	Cretaceous	orthogneiss	Tenpeak pluton, interlayered rocks of
	Kog(tl)	Cretaceous	orthogneiss	Tenpeak pluton, light-colored rocks of
	KJam(h)	Cretaceous-Jurassic	amphibolite	Helena Haystack melange
	KJmm(w)	Cretaceous-Jurassic	marine metasedimentary rocks	western melange belt, rocks of the
	KJmv(w)	Cretaceous-Jurassic	metavolcanic rocks	western melange belt, rocks of the
	KJph(w)	Cretaceous-Jurassic	phyllite, low grade	western melange belt, rocks of the
	pKhm(b)	pre-Cretaceous	heterogeneous metamorphic rocks	Bell Pass melange
	Jam(c)	Jurassic	amphibolite	Chiwaukum Schist, Nason terrane
	Jam(em)	Jurassic	amphibolite	Easton metamorphic suite, Nwest Cascade system
	Jar(e)	Jurassic	argillite	eastern melange belt, rocks of the
	Jigb(e)	Jurassic	gabbro	eastern melange belt, rocks of the
	Jigb(h)	Jurassic	gabbro	Helena Haystack melange
	Jigbd(w)	Jurassic	gabbro and diorite	western melange belt, rocks of the
	Jit(e)	Jurassic	tonalite	eastern melange belt, rocks of the
	Jit(h)	Jurassic	tonalite	Helena Haystack melange
	Jmb(c)	Jurassic	marble	Chiwaukum Schist, Nason terrane
	Jmt(em)	Jurassic	metasedimentary and metavolcanic rocks	Easton metamorphic suite, Nwest Cascade system
	Jmt(ems)	Jurassic	metasedimentary and metavolcanic rocks	Easton metamorphic suite,silver phyllite of,NW Cascade system
	Jmv(h)	Jurassic	metavolcanic rocks	Helena Haystack melange
	Jph(d)	Jurassic	phyllite, low grade	Darrington Phyllite
	Jph(ds)	Jurassic	phyllite, low grade	Darrington Phyllite, silver colored
	Jsc(c)	Jurassic	schist, high grade	Chiwaukum Schist, Nason terrane
	Jsc(c)	Jurassic	schist, high grade	Chiwaukum Schist, Nason terrane
	Jsh(s)	Jurassic	schist, low grade	Shuksan Greenschist
	Ju(e)	Jurassic	ultrabasic rocks	eastern melange belt, rocks of the
	Ju(em)	Jurassic	ultrabasic rocks	Easton metamorphic suite, Nwest Cascade system
	Ju(w)	Jurassic	ultrabasic rocks	western melange belt, rocks of the
	JTRmc(e)	Jurassic-Triassic	metasedimentary rocks, cherty	eastern melange belt, rocks of the
	JTRmt(e)	Jurassic-Triassic	metasedimentary and metavolcanic rocks	eastern melange belt, rocks of the
	JPMmc(b)	Jurassic-Permian	metasedimentary rocks, cherty	Bell Pass melange
	JMmt(t)	Jurassic-Miss.	metasedimentary and metavolcanic rocks	Trafton terrane of Whetten and others (1988)
	TRhm(cc)	Triassic	heterogeneous metamorphic rocks	Cas. Riv. unit, Chelan Mtns. terr., Cas. Riv. Schist
	TRhm(cc)	Triassic	heterogeneous metamorphic rocks	Cas. Riv. unit, Chelan Mtns. terr., Cas. Riv. Schist
	TRiq(m)	Triassic	quartz diorite	Marblemount Meta-Quartz Diorite, Chelan Mts. terrane
	TRiq(m)	Triassic	quartz diorite	Marblemount Meta-Quartz Diorite, Chelan Mts. terrane
	TRmb(e)	Triassic	marble	eastern melange belt, rocks of the
	TRms(cc)	Triassic	metasedimentary rocks	Cascade River Schist, Chelan Mountains terrane
	TRms(cc)	Triassic	metasedimentary rocks	Cascade River Schist, Chelan Mountains terrane
	TRmv(cc)	Triassic	metavolcanic rocks	Cascade River Schist, Chelan Mountains terrane
	TRog(m)	Triassic	orthogneiss	Marblemount Meta-Quartz Diorite, Chelan Mts. terrane
	TRog(m)	Triassic	orthogneiss	Marblemount Meta-Quartz Diorite, Chelan Mts. terrane
	TRog(mm)	Triassic	orthogneiss	Magic Mountain Gneiss
	TRv(ew)	Triassic	volcanic rocks	eastern melange belt, volcanic rocks of Whitehorse Mountain
	TRPMhmc(n)	Triassic-Permian	heterogeneous metamorphic rocks, chert bearing	Napeequa unit, Chelan Mtns. terr., Napeequa Schist
	TRPMhmc(n)	Triassic-Permian	heterogeneous metamorphic rocks, chert bearing	Napeequa unit, Chelan Mtns. terr., Napeequa Schist
	TRPMmb(n)	Triassic-Permian	marble	Napeequa unit, Chelan Mts. terrane, Napeequa Schist
	TRPMmb(n)	Triassic-Permian	marble	Napeequa unit, Chelan Mts. terrane, Napeequa Schist
	TRPMu(n)	Triassic-Permian	ultrabasic rocks	Napeequa unit, Chelan Mountains terrane
	TRPMu(n)	Triassic-Permian	ultrabasic rocks	Napeequa unit, Chelan Mountains terrane
	MZmm(h)	Mesozoic	marine metasedimentary rocks	Helena Haystack melange
	MZu(h)	Mesozoic	ultrabasic rocks	Helena Haystack melange
	MZPZigb	Mesozoic-Paleozoic	gabbro	---
	MZPZms(r)	Mesozoic-Paleozoic	metasedimentary rocks	Rinker Ridge, slate of
	PMDmb(c)	Permian-Devonian	marble	Chilliwack Group of Cairnes (1944)
	PMDms(c)	Permian-Devonian	metasedimentary rocks	Chilliwack Group of Cairnes (1944)
	PMDmv(c)	Permian-Devonian	metavolcanic rocks	Chilliwack Group of Cairnes (1944)
	Pigd(t)	Pennsylvanian	granodiorite	Trafton terrane of Whetten and others (1988)
	pDgn(y)	pre-Devonian	gneiss	Yellow Aster Complex of Misch (1966)
	pDi(y)	pre-Devonian	intrusive rocks, undivided	Yellow Aster Complex of Misch (1966)
	pCgn(s)	Precambrian	gneiss	Swakane Biotite Gneiss