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	wtr	---	water	---
	Qb	Holocene	beach deposits	---
	Qf	Holocene	artificial fill, including modified land	---
	Qf	Holocene	artificial fill, including modified land	---
	Qp	Holocene	peat deposits	---
	Qa	Quaternary	alluvium	---
	Qc	Quaternary	continental sedimentary deposits or rocks	---
	Qcg	Quaternary	continental sedimentary deposits or rocks, conglomerate	---
	Qls	Quaternary	mass-wasting deposits, mostly landslides	---
	Qad	Pleistocene	alpine glacial drift, Fraser-age	---
	Qc(o)	Pleistocene	continental sedimentary deposits or rocks	Olympia-age nonglacial sediments
	Qc(w)	Pleistocene	continental sedimentary deposits or rocks	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)
	Qgd	Pleistocene	continental glacial drift, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgdm	Pleistocene	glaciomarine drift, Fraser-age	may correlate with Everson Interstade
	Qgo	Pleistocene	continental glacial outwash, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgp	Pleistocene	continental glacial drift, pre-Fraser	---
	Qgp(d)	Pleistocene	continental glacial drift, pre-Fraser	Double Bluff Drift
	Qgp(p)	Pleistocene	continental glacial drift, pre-Fraser	Possession Drift
	Qgpc	Pleistocene	continental glacial drift, pre-Fraser, and nonglacial deposits	---
	Qgt	Pleistocene	continental glacial till, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgu	Pleistocene	glacial drift, undivided	---
	Qt	Pleistocene	terraced deposits	---
	Mc(2)	Miocene	continental sedimentary deposits or rocks	---
	Mvc(2)	Miocene	volcaniclastic deposits or rocks	---
	OEcg	Oligocene-Eocene	continental sedimentary deposits or rocks, conglomerate	---
	OEm	Oligocene-Eocene	marine sedimentary rocks	---
	OEm(b)	Oligocene-Eocene	marine sedimentary rocks	Blakeley Formation
	OEn	Oligocene-Eocene	nearshore sedimentary rocks	---
	OEn	Oligocene-Eocene	nearshore sedimentary rocks	---
	OEvb	Oligocene-Eocene	basalt flows	---
	Em(2l)	Eocene, upper	marine sedimentary rocks	Lyre Formation
	Em(2lc)	Eocene, upper	marine sedimentary rocks	Lyre Formation, conglomerate member of
	Em(2lcu)	Eocene, upper	marine sedimentary rocks	Lyre Formation, upper conglomerate member of
	Em(2lu)	Eocene, upper	marine sedimentary rocks	Lyre Formation, upper sandstone member of
	Em(2q)	Eocene, upper	marine sedimentary rocks	Quimper Sandstone
	Em(2tr)	Eocene, upper	marine sedimentary rocks	Twin River Formation
	Em(2a)	Eocene, middle to upper	marine sedimentary rocks	Aldwell Formation
	Ec(2r)	Eocene	continental sedimentary deposits or rocks	Renton Formation, Puget Group
	Eian	Eocene	intrusive andesite	---
	Eian	Eocene	intrusive andesite	---
	Eib	Eocene	basic intrusive rocks	---
	Eigb	Eocene	gabbro	---
	Eit	Eocene	tonalite	---
	Ev(p)	Eocene	volcanic rocks	Mount Persis, volcanic rocks of
	Evc(l)	Eocene	volcaniclastic deposits or rocks	Lyre Formation
	Evc(t)	Eocene	volcaniclastic deposits or rocks	Tukwila Formation, Puget Group
	Evr	Eocene	rhyolite flows	---
	Evt	Eocene	tuffs and tuff breccias	---
	Em(1)	Eocene, middle	marine sedimentary rocks	---
	Em(1c)	Eocene, lower to middle	marine sedimentary rocks	Crescent Formation, sedimentary rocks of
	Ev(c)	Eocene, lower to middle	basalt flows and flow breccias, Crescent Formation	Crescent Formation
	Ev(c)	Eocene, lower to middle	basalt flows and flow breccias, Crescent Formation	Crescent Formation