CLICK ON A COLORED AREA OF THE GEOLOGY MAP TO SHOW INFORMATION HERE
	wtr	---	water	---
	tz	---	tectonic zone	Lopez structural complex
	Qa	Holocene	alluvium	---
	Qa(c)	Holocene	alluvium	clay and silt
	Qa(s)	Holocene	alluvium	sand
	Qaf	Holocene	alluvial fan deposits	---
	Qb	Holocene	beach deposits	---
	Qd	Holocene	dune sand	---
	Qf	Holocene	artificial fill, including modified land	---
	Qoa	Holocene	alluvium, older	---
	Qoa(c)	Holocene	alluvium, older	clay and silt facies
	Qoa(s)	Holocene	alluvium, older	sand facies
	Qls	Holocene-Pleistocene	mass-wasting deposits, mostly landslides	---
	Qp	Holocene-Pleistocene	peat deposits	---
	Qta	Holocene-Pleistocene	talus deposits	---
	Qvl(k)	Holocene-Pleistocene	lahars	Kennedy Creek assemblage
	Qc	Pleistocene	continental sedimentary deposits, conglomerate	pre-Fraser nonglacial seds, undiff.
	Qc(o)	Pleistocene	continental sedimentary deposits, conglomerate	Olympia-age nonglacial sediments
	Qc(w)	Pleistocene	continental sedimentary deposits, conglomerate	Whidbey Formation
	Qga	Pleistocene	advance continental glacial outwash, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qga(t)	Pleistocene	advance continental glacial outwash, Fraser-age	transitional beds of Menard (1985)
	Qgac	Pleistocene	advance continental glacial outwash, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgas	Pleistocene	advance glacial outwash, sand, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgd	Pleistocene	continental glacial drift, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgdc	Pleistocene	glacial and non-glacial deposits, Fraser-age	---
	Qgdm	Pleistocene	glaciomarine drift, Fraser-age	may correlate with Everson Interstade
	Qgdm(e)	Pleistocene	glaciomarine drift, Fraser-age	Everson Glaciomarine Drift
	Qgdm(e)	Pleistocene	glaciomarine drift, Fraser-age	Everson Glaciomarine Drift
	Qgdm(e)	Pleistocene	glaciomarine drift, Fraser-age	Everson Glaciomarine Drift
	Qgl	Pleistocene	glaciolacustrine deposits, 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
	Qgoc	Pleistocene	continental glacial outwash, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgocm	Pleistocene	continental glacial outwash,marine,silt and clay,Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgog	Pleistocene	continental glacial outwash, gravel, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgogm(p)	Pleistocene	glacial outwash, marine, gravel, Fraser-age	Partridge gravel, Whidbey Island
	Qgogm(p)	Pleistocene	glacial outwash, marine, gravel, Fraser-age	Partridge gravel, Whidbey Island
	Qgogm(p)	Pleistocene	glacial outwash, marine, gravel, Fraser-age	Partridge gravel, Whidbey Island
	Qgom	Pleistocene	continental glacial outwash, marine, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgom(e)	Pleistocene	continental glacial outwash, marine, Fraser-age	Everson Glaciomarine Drift, outwash, marine
	Qgos	Pleistocene	continental glacial outwash, sand, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgosm	Pleistocene	glacial outwash, marine, sand, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgosm	Pleistocene	glacial outwash, marine, sand, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgp	Pleistocene	continental glacial drift, pre-Fraser	---
	Qgpc	Pleistocene	glacial drift, pre-Fraser, and nonglacial deposits	---
	Qgpm	Pleistocene	glaciomarine drift, pre-Fraser	---
	Qgt	Pleistocene	continental glacial till, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qguc	Pleistocene	glacial and non-glacial deposits, undivided	Fraser and pre-Fraser deposits
	OEc(b)	Oligocene-Eocene	continental sedimentary deposits, conglomerate	Bulson Creek of Lovseth (1975), rocks of
	OEm(ms)	Oligocene-Eocene	marine sedimentary rocks	Marrowstone Shale of Durham (1944)
	OEm(q)	Oligocene-Eocene	marine sedimentary rocks	Quimper Sandstone of Durham (1944)
	OEn(b)	Oligocene-Eocene	nearshore sedimentary rocks	Bulson Creek of Lovseth (1975), rocks of
	Em(2ll)	Eocene, upper	marine sedimentary rocks	Lyre Formation, lower conglomerate member of
	Em(2lu)	Eocene, upper	marine sedimentary rocks	Lyre Formation, upper sandstone member of
	Ec(b)	Eocene	continental sedimentary deposits, conglomerate	Barlow Pass Volcanics
	Ec(c)	Eocene	continental sedimentary deposits, conglomerate	Chuckanut Formation
	Eigd(g)	Eocene	granodiorite	Granite Falls stock and associated plutons
	Eigd(g)	Eocene	granodiorite	Granite Falls stock and associated plutons
	Eva	Eocene	andesite flows	---
	Evr	Eocene	rhyolite flows	---
	Em(1sb)	Eocene, lower-mid	marine sedimentary rocks	Scow Bay, sandstone of
	Ev(cf)	Eocene, lower-mid	basalt flows and flow breccias, Crescent Formation	Crescent Formation, flows of
	Ecg(1)	Eocene, lower	continental sedimentary deposits, conglomerate	---
	Tc	Tertiary	continental sedimentary deposits, conglomerate	---
	Kvb(lr)	Cretaceous	basalt flows	Lopez Island, basalts of Richardson
	KJar(f)	Cretaceous-Jurassic	argillite	Fidalgo ophiolite of Brown and others (1979)
	KJm(c)	Cretaceous-Jurassic	marine sedimentary rocks	Constitution Formation, Decatur terrane
	KJm(l)	Cretaceous-Jurassic	marine sedimentary rocks	Lummi Formation
	KJm(lc)	Cretaceous-Jurassic	marine sedimentary rocks	Lopez structural complex, Constitution Formation derivative
	KJm(ll)	Cretaceous-Jurassic	marine sedimentary rocks	Lopez structural complex, Lummi Formation derivative
	KJmm(f)	Cretaceous-Jurassic	marine metasedimentary rocks	Fidalgo ophiolite of Brown and others (1979)
	KJmm(w)	Cretaceous-Jurassic	marine metasedimentary rocks	western melange belt, rocks of the
	KJmm(w)	Cretaceous-Jurassic	marine metasedimentary rocks	western melange belt, rocks of the
	KJms	Cretaceous-Jurassic	metasedimentary rocks	---
	KJms(g)	Cretaceous-Jurassic	metasedimentary rocks	Goat Island area, rocks of the
	KJmv(g)	Cretaceous-Jurassic	metavolcanic rocks	Goat Island area, rocks of the
	KJvc(f)	Cretaceous-Jurassic	volcaniclastic deposits or rocks	Fidalgo ophiolite of Brown and others (1979)
	Jm(fh)	Jurassic, upper	marine sedimentary rocks	Fidalgo igneous complex, Hunter Bay area
	Jmv(fh)	Jurassic, mid-upper	metavolcanic rocks	Fidalgo igneous complex, Hunter Bay area
	Ji(f)	Jurassic	intrusive rocks, undivided	Fidalgo ophiolite of Brown and others (1979)
	Jigb(f)	Jurassic	gabbro	Fidalgo ophiolite of Brown and others (1979)
	Jmv(h)	Jurassic	metavolcanic rocks	Helena Haystack melange
	Jph(d)	Jurassic	phyllite, low grade	Darrington Phyllite
	Jsh(s)	Jurassic	schist, low grade	Shuksan Greenschist
	Ju(f)	Jurassic	ultrabasic rocks	Fidalgo ophiolite of Brown and others (1979)
	Jv(f)	Jurassic	volcanic rocks	Fidalgo ophiolite of Brown and others (1979)
	Jvb(f)	Jurassic	basalt flows	Fidalgo ophiolite of Brown and others (1979)
	Jvb(l)	Jurassic	basalt flows	Lopez structural complex of Brandon and others (1988)
	Jvb(l)	Jurassic	basalt flows	Lopez structural complex of Brandon and others (1988)
	JTRmt(e)	Jurassic-Triassic	metasedimentary and metavolcanic rocks	eastern melange belt, rocks of the
	JMmt(t)	Jurassic-Miss.	metasedimentary and metavolcanic rocks	Trafton terrane of Whetten and others (1988)
	MZmm(h)	Mesozoic	marine metasedimentary rocks	Helena Haystack melange
	MZmm(h)	Mesozoic	marine metasedimentary rocks	Helena Haystack melange
	MZu(h)	Mesozoic	ultrabasic rocks	Helena Haystack melange
	MZu(h)	Mesozoic	ultrabasic rocks	Helena Haystack melange
	MZu(h)	Mesozoic	ultrabasic rocks	Helena Haystack melange
	Pigbd(t)	Pennsylvanian	gabbro and diorite	Trafton terrane of Whetten and others (1988)
	pDit(t)	pre-Devonian	tonalite	Turtleback Complex