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	wtr	---	water	---
	Qa	Holocene	alluvium	---
	Qb	Holocene	beach deposits	---
	Qf	Holocene	artificial fill, including modified land	---
	Qls	Holocene	mass-wasting deposits, mostly landslides	---
	Qp	Holocene	peat deposits	---
	Qp	Holocene	peat deposits	---
	Qaf	Holocene-Pleistocene	alluvial fan deposits	---
	Qoa	Holocene-Pleistocene	alluvium, older	---
	Qad	Pleistocene	alpine glacial drift, Fraser-age	---
	Qad	Pleistocene	alpine glacial drift, Fraser-age	---
	Qao	Pleistocene	alpine glacial outwash, Fraser-age	---
	Qat	Pleistocene	alpine glacial till, Fraser-age	---
	Qc	Pleistocene	continental sedimentary deposits or rocks	pre-Fraser nonglacial seds, undiff.
	Qga	Pleistocene	advance continental glacial outwash, 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
	Qgd	Pleistocene	continental glacial drift, 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
	Qgd	Pleistocene	continental glacial drift, 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
	Qgdm	Pleistocene	glaciomarine drift, Fraser-age	Everson Interstade, may correlate with
	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
	Qgo	Pleistocene	continental glacial outwash, 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
	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
	Qgo(i)	Pleistocene	continental glacial outwash, Fraser-age	ice-contact recessional outwash
	Qgom(es)	Pleistocene	continental glacial outwash, marine, Fraser-age	Everson Glaciomarine Drift, San Juan Island
	Qgos	Pleistocene	continental glacial outwash, sand, 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
	Qguc	Pleistocene	glacial and non-glacial deposits, undivided	Fraser and pre-Fraser deposits
	Qs	Pleistocene	sedimentary deposits or rocks	---
	MOm(p)	Miocene-Oligocene	marine sedimentary rocks	Pysht Formation, upper Twin River Group
	OEm	Oligocene-Eocene	marine sedimentary rocks	Needles-GrayWolf lith.assmbl.(Tabor&Cady,'78)
	OEm	Oligocene-Eocene	marine sedimentary rocks	Western Olympic lithic assemblage
	OEm(m)	Oligocene-Eocene	marine sedimentary rocks	Makah Formation, middle Twin River Group
	OEm(m)	Oligocene-Eocene	marine sedimentary rocks	Makah Formation, middle Twin River Group
	OEm(mc)	Oligocene-Eocene	marine sedimentary rocks	Makah Fm., middle Twin River Group, conglomerate of
	OEm(mc)	Oligocene-Eocene	marine sedimentary rocks	Makah Fm., middle Twin River Group, conglomerate of
	OEm(r)	Oligocene-Eocene	marine sedimentary rocks	rhythmic thin- to medium-bedded sandstone and shale
	OEm(r)	Oligocene-Eocene	marine sedimentary rocks	rhythmic thin- to medium-bedded sandstone and shale
	OEm(tr)	Oligocene-Eocene	marine sedimentary rocks	Twin River Group, lower & middle members, undivided
	OEml(c)	Oligocene-Eocene	marine clastic rocks	dominantly thick-bedded lithic sandstone
	OEvb	Oligocene-Eocene	basalt flows	---
	Em(2h)	Eocene, upper	marine sedimentary rocks	Hoko River Formation, lower Twin River Group
	Em(2lc)	Eocene, upper	marine sedimentary rocks	Lyre Formation, conglomerate member of
	Em(2ls)	Eocene, upper	marine sedimentary rocks	Lyre Formation, sandstone member of
	Em(2ltc)	Eocene, upper	marine sedimentary rocks	Lyre and Twin River Formations, sandstone and conglomerate of
	Em(2lts)	Eocene, upper	marine sedimentary rocks	Lyre and Twin River Formations, siltstone of
	Em(2a)	Eocene, middle to upper	marine sedimentary rocks	Aldwell Formation
	Evb(a)	Eocene, middle to upper	basalt flows	Aldwell Formation
	Em(1c)	Eocene, lower to middle	marine sedimentary rocks	Crescent Formation, sedimentary rocks of
	Ev(cf)	Eocene, lower to middle	basalt flows and flow breccias, Crescent Formation	Crescent Formation, flows of
	Ev(cp)	Eocene, lower to middle	basalt flows and flow breccias, Crescent Formation	Crescent Formation, pillowed
	Evr(c)	Eocene, lower to middle	rhyolite flows	Crescent Formation, rhyolite flow of
	Evt(c)	Eocene, lower to middle	tuffs and tuff breccias	Crescent Formation, tuffaceous rocks at Striped Peak
	Evt(c)	Eocene, lower to middle	tuffs and tuff breccias	Crescent Formation, tuffaceous rocks at Striped Peak
	EPAm	Eocene-Paleocene	marine sedimentary rocks	Blue Mountain unit of the Crescent Formation
	EPAm(c)	Eocene-Paleocene	marine sedimentary rocks	Blue Mountain unit of the Crescent Formation, conglomerate of
	KJm(c)	Cretaceous-Jurassic	marine sedimentary rocks	Constitution Formation, Decatur terrane
	JTRmct(o)	Jurassic-Triassic	chert-rich marine sedimentary rocks	Orcas Chert, Deadman Bay terrane