CLICK ON A COLORED AREA OF THE GEOLOGY MAP TO SHOW INFORMATION HERE
	wtr	---	water	---
	Qa	Quaternary	alluvium	---
	Qb	Quaternary	beach deposits	---
	Qls	Quaternary	mass-wasting deposits, mostly landslides	---
	Qoa	Quaternary	alluvium, older	---
	Qapo(lh)	Pleistocene	alpine glacial outwash, pre-Fraser	Logan Hill Formation
	Qapo(wc)	Pleistocene	alpine glacial outwash, pre-Fraser	Wedekind Creek Formation
	Qgm	Pleistocene	continental glacial moraines, 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
	Qgog	Pleistocene	continental glacial outwash, gravel, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgos	Pleistocene	continental glacial outwash, sand, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qgp	Pleistocene	continental glacial drift, pre-Fraser	---
	Qgt	Pleistocene	continental glacial till, Fraser-age	mostly Vashon Stade in western WA; unnamed in eastern WA
	Qt	Pleistocene	terraced deposits	---
	QPLc	Pleistocene-Pliocene	continental sedimentary deposits, conglomerate	---
	Mc(w)	Miocene, mid-upper	continental sedimentary deposits, conglomerate	Wilkes Formation
	Mm(2m)	Miocene, mid-upper	marine sedimentary rocks	Montesano Formation
	Mm(2ms)	Miocene, mid-upper	marine sedimentary rocks	Montesano Formation, sandstone of
	Mv(gN2)	Miocene, middle	basalt flows	Grande Ronde Basalt, N2 (upper flows of norm.mag.pol.)
	Mv(sp)	Miocene, middle	basalt flows	Pomona Member, Saddle Mountains Basalt
	Mvi(sp)	Miocene, middle	basalt flows, invasive	Pomona Member, Saddle Mountains Basalt
	Mm(1a)	Miocene, lower-mid	marine sedimentary rocks	Astoria Formation
	Mm(1al)	Miocene, lower-mid	marine sedimentary rocks	Astoria Formation, Rotalia becki zone (Luisian?)
	Mm(1ar)	Miocene, lower-mid	marine sedimentary rocks	Astoria Formation, Baggina washingtonensis zone (Relizian)
	Mm(1as)	Miocene, lower-mid	marine sedimentary rocks	Astoria Formation, Siphogenerina kleinpelli zone (Saucesian)
	OEm(lc)	Oligocene-Eocene	marine sedimentary rocks	Lincoln Creek Formation
	OEm(lcs)	Oligocene-Eocene	marine sedimentary rocks	Lincoln Creek Formtion, basaltic sandstone member of
	Em(2m)	Eocene, mid-upper	marine sedimentary rocks	McIntosh Formation
	En(c)	Eocene, mid-upper	nearshore sedimentary rocks	Cowlitz Formation
	En(sk)	Eocene, mid-upper	nearshore sedimentary rocks	Skookumchuck Formation
	Eib	Eocene	basic intrusive rocks	---
	Evt(pe)	Eocene	tuffs and tuff breccias	Pe Ell Volcanics Member, Cowlitz Formation
	Em(1)	Eocene, middle	marine sedimentary rocks	---
	Em(1c)	Eocene, lower-mid	marine sedimentary rocks	Crescent Formation, sedimentary rocks of
	Ev(c)	Eocene, lower-mid	basalt flows and flow breccias, Crescent Formation	Crescent Formation