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wtr --- water ---
ice Holocene ice ---
Qva(ah) Holocene andesite flows Mount Adams, Holocene andesite of
Qvc(a) Holocene volcaniclastic deposits or rocks Mount Adams, volcaniclastic rocks of, debris flows
Qvl(t) Holocene lahars Trout Lake, mudflow of
Qa Quaternary alluvium ---
Qls Quaternary mass-wasting deposits, mostly landslides ---
Qva(a) Quaternary andesite flows Mount Adams, andesite and olivine andesite flows of
Qva(a) Quaternary andesite flows Mount Adams, andesite and olivine andesite flows of
Qva(hb) Quaternary andesite flows Hellroaring and Big Muddy Creek complex
Qva(os) Quaternary andesite flows Old Snowy Mountain, andesite of
Qva(sb) Quaternary andesite flows S Butte, andesite of
Qva(sg) Quaternary andesite flows Signal Peak, andesite of
Qva(sw) Quaternary andesite flows Swampy Meadow, andesite of
Qvb Quaternary basalt flows ---
Qvb(bd) Quaternary basalt flows Badger Peak, basalt of
Qvb(bk) Quaternary basalt flows Blue Lake, basalt of
Qvb(bm) Quaternary basalt flows Bird Mountain, basalt of
Qvb(bn) Quaternary basalt flows Bunnell Butte, basalt of
Qvb(bp) Quaternary basalt flows Burnt Peak, basalt of
Qvb(cm) Quaternary basalt flows Chenamus Lake, basalt of
Qvb(co) Quaternary basalt flows County Park, basalt of
Qvb(cp) Quaternary basalt flows Camas Prairie, basalt of
Qvb(de) Quaternary basalt flows Deep Lake, basalt of
Qvb(dh) Quaternary basalt flows Dead Horse Creek, basalt of
Qvb(ec) Quaternary basalt flows East Canyon Creek, basalt of
Qvb(fm) Quaternary basalt flows Flattop Mountain, basalt of
Qvb(ga) Quaternary basalt flows Glaciate Butte, basalt of
Qvb(go) Quaternary basalt flows Gotchen Creek, basalt of
Qvb(gr) Quaternary basalt flows Green Canyon, basalt of
Qvb(gt) Quaternary basalt flows Goat Butte, basalt of
Qvb(hl) Quaternary basalt flows Hidden Lake, basalt of
Qvb(ic) Quaternary basalt flows Ice Cave, basalt of
Qvb(ih) Quaternary basalt flows Indian Heaven, basalt of
Qvb(iv) Quaternary basalt flows Indian Viewpoint, basalt of
Qvb(lb) Quaternary basalt flows Lone Butte, basalt of
Qvb(lc) Quaternary basalt flows Lake Comcomly, basalt of
Qvb(lf) Quaternary basalt flows Loaf, basalt of The
Qvb(lg) Quaternary basalt flows Little Goose Creek, basalt of
Qvb(lk) Quaternary basalt flows Lakeview Mountain, basalt of
Qvb(ml) Quaternary basalt flows McClellan Meadows, basalt of
Qvb(mq) Quaternary basalt flows Mosquito Creek, basalt of
Qvb(oc) Quaternary basalt flows Outlaw Creek, basalt of
Qvb(pf) Quaternary basalt flows Paradise Falls, basalt of
Qvb(pl) Quaternary basalt flows Placid Lake, basalt of
Qvb(rb) Quaternary basalt flows Red Butte, basalt of
Qvb(rc) Quaternary basalt flows Rush Creek, basalt of
Qvb(ri) Quaternary basalt flows Riley Creek, basalt of
Qvb(rl) Quaternary basalt flows Red Lake, basalt of
Qvb(sc) Quaternary basalt flows Spring Creek, basalt of
Qvb(sh) Quaternary basalt flows Spud Hill, basalt of
Qvb(sk) Quaternary basalt flows Skull Creek, basalt west of
Qvb(sm) Quaternary basalt flows Smith Butte, basalt of
Qvb(sq) Quaternary basalt flows Squaw Butte, basalt of
Qvb(st) Quaternary basalt flows Sawtooth Mountain, basalt of
Qvb(sy) Quaternary basalt flows Sleeping Beauty, basalt of
Qvb(tb) Quaternary basalt flows Twin Buttes, basalt of
Qvb(tc) Quaternary basalt flows Tillicum Creek, basalt of
Qvb(tl) Quaternary basalt flows Thomas Lake, basalt of
Qvb(tlc) Quaternary basalt flows Trout Lake Creek, basalt of
Qvb(to) Quaternary basalt flows Two Lakes, basalt of
Qvb(w) Quaternary basalt flows Walupt Lake, basalt of
Qvba(el) Quaternary basaltic andesite flows Eunice Lake, basaltic andesite of
Qvba(lm) Quaternary basaltic andesite flows Little Mount Adams, basaltic andesite of
Qvba(me) Quaternary basaltic andesite flows Meadow Creek, basaltic andesite of
Qvba(ph) Quaternary basaltic andesite flows Potato Hill, basaltic andesite of
Qvba(sn) Quaternary basaltic andesite flows Snipes Mountain, basaltic andesite of
Qvc(sh) Quaternary volcaniclastic deposits or rocks Mount St. Helens, rocks and deposits of
Qvd(a) Quaternary dacite flows Mount Adams, dacite flows of
Qvd(ol) Quaternary dacite flows Olallie Lake, dacite of
Qvr(a) Quaternary rhyolite flows Mount Adams, rhyolite of
Qad Pleistocene alpine glacial drift, Fraser-age ---
Qad(e) Pleistocene alpine glacial drift, Fraser-age Evans Creek Drift
Qad(md) Pleistocene alpine glacial drift, Fraser-age McDonald Ridge drift
Qap(h) Pleistocene alpine glacial drift, pre-Fraser Hayden Creek Drift
Qap(ws) Pleistocene alpine glacial drift, pre-Fraser White Salmon drift
Qapt(h) Pleistocene alpine glacial till, pre-Fraser Hayden Creek Drift, till deposits of
Qat(e) Pleistocene alpine glacial till, Fraser-age Evans Creek Drift, till deposits
QPLian Pleistocene-Pliocene intrusive andesite ---
QPLian Pleistocene-Pliocene intrusive andesite ---
QPLva Pleistocene-Pliocene andesite flows ---
QPLva(g) Pleistocene-Pliocene andesite flows Goat Rocks, andesite of
QPLvb Pleistocene-Pliocene basalt flows ---
QPLvb(l) Pleistocene-Pliocene basalt flows Lincoln Plateau, basalt of
QPLvb(s) Pleistocene-Pliocene basalt flows Simcoe Mountains, volcanic rocks of
QPLvd Pleistocene-Pliocene dacite flows ---
PLv(d) Pliocene volcanic rocks Devils Horns, rhyolite tuffs and flows of
PLvc Pliocene volcaniclastic deposits or rocks ---
PLvt Pliocene tuffs and tuff breccias ---
PLMiad Pliocene-Miocene intrusive andesite and dacite ---
PLOia Pliocene-Oligocene acidic intrusive rocks ---
PLOian Pliocene-Oligocene intrusive andesite ---
PLOib Pliocene-Oligocene basic intrusive rocks ---
PLOiba Pliocene-Oligocene intrusive basaltic andesite ---
PLOigb Pliocene-Oligocene gabbro ---
Mvt(3) Miocene, upper tuffs and tuff breccias ---
Mid Miocene diorite ---
Miq Miocene quartz diorite ---
Mir Miocene intrusive rhyolite ---
Mv(g) Miocene, middle basalt flows Grande Ronde Basalt, Columbia River Basalt Group
Mv(gN2) Miocene, middle basalt flows Grande Ronde Basalt, N2 (upper flows of norm.mag.pol.)
Mv(gR2) Miocene, middle basalt flows Grande Ronde Basalt, R2 (upper flows of rev.mag.pol.)
Mv(sp) Miocene, middle basalt flows Pomona Member, Saddle Mountains Basalt
Mv(wfs) Miocene, middle basalt flows Frenchman Springs Member, Wanapum Basalt
Mva(4) Miocene, middle andesite flows ---
Mcg(ec) Miocene, lower continental sedimentary deposits, conglomerate Eagle Creek Formation
Mva(3) Miocene, lower andesite flows ---
Mva(cb) Miocene, lower andesite flows Council Bluff, volcanic rocks of
Mvb(3) Miocene, lower basalt flows ---
Mvba(3) Miocene, lower basaltic andesite flows ---
Mvc(3) Miocene, lower volcaniclastic deposits or rocks ---
Mvd(3) Miocene, lower dacite flows ---
Mvr(3) Miocene, lower rhyolite flows ---
MOv Miocene-Oligocene volcanic rocks ---
Ovba(2) Oligocene, upper basaltic andesite flows ---
Ovc(2) Oligocene, upper volcaniclastic deposits or rocks ---
Ovc(oh) Oligocene volcaniclastic deposits or rocks Ohanapecosh Formation
Ec(2cc) Eocene continental sedimentary deposits, conglomerate Chambers Creek, beds of
Ti Tertiary intrusive rocks, undivided ---