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CLICK ON A COLORED AREA OF THE GEOLOGY MAP TO SHOW INFORMATION HERE |
|
wtr |
--- |
water |
--- |
|
ice |
Holocene |
ice |
--- |
|
Qf |
Holocene |
artificial fill, including
modified land |
--- |
|
Qvl(o) |
Holocene |
lahars |
Osceola Mudflow |
|
Qa |
Quaternary |
alluvium |
--- |
|
Qls |
Holocene-Pleistocene |
mass-wasting deposits,
mostly landslides |
--- |
|
Qls(m) |
Holocene-Pleistocene |
mass-wasting deposits,
other than landslides |
mass-wasting deposits,
other than landslides |
|
Qp |
Quaternary |
peat deposits |
--- |
|
Qs |
Holocene-Pleistocene |
sedimentary deposits or
rocks |
--- |
|
Qta |
Quaternary |
talus deposits |
--- |
|
Qva(mr) |
Quaternary |
andesite flows |
Mount Rainier, andesite of |
|
Qvt |
Quaternary |
tuffs and tuff breccias |
--- |
|
Qad(e) |
Pleistocene |
alpine glacial drift,
Fraser-age |
Evans Creek Drift |
|
Qap |
Pleistocene |
alpine glacial drift,
pre-Fraser |
--- |
|
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 |
|
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 |
|
Qgpc |
Pleistocene |
glacial drift, pre-Fraser,
and nonglacial deposits |
--- |
|
Qgt |
Pleistocene |
continental glacial till,
Fraser-age |
mostly Vashon Stade in
western WA; unnamed in eastern WA |
|
Qvb(c) |
Pleistocene |
basalt flows |
Canyon Creek, basalt of |
|
PLvb(dr) |
Pliocene |
basalt flows |
Dalles Ridge, basalt of |
|
Mc(e) |
Miocene, mid-upper |
continental sedimentary
deposits, conglomerate |
Ellensburg Formation |
|
Mian |
Miocene |
intrusive andesite |
--- |
|
Mida |
Miocene |
intrusive dacite |
--- |
|
Mig(s) |
Miocene |
granite |
Snoqualmie Batholith |
|
Migd(cr) |
Miocene |
granodiorite |
Carbon River stock |
|
Migd(s) |
Miocene |
granodiorite |
Snoqualmie Batholith |
|
Mim(s) |
Miocene |
monzonite |
Snoqualmie Batholith |
|
Mir(fp) |
Miocene |
intrusive rhyolite |
Fifes Peak Formation,
rhyolite of Clear West Peak |
|
Mit |
Miocene |
tonalite |
--- |
|
Mva(fp) |
Miocene |
andesite flows |
Fifes Peak Formation |
|
Mva(fpb) |
Miocene |
andesite flows |
Fifes Peak Formation,
andesite and basalt megabreccia |
|
Mva(h) |
Miocene |
andesite flows |
Howson Andesite |
|
Mvc(cp) |
Miocene |
volcaniclastic deposits or
rocks |
Cooper Pass, volcaniclastic
rocks of |
|
Mvc(fp) |
Miocene |
volcaniclastic deposits or
rocks |
Fifes Peak Formation |
|
Mvr(fp) |
Miocene |
rhyolite flows |
Fifes Peak Formation, tuff
of Clear West Peak |
|
Mvt(fp) |
Miocene |
tuffs and tuff breccias |
Fifes Peak Formation, tuff
of Clear West Peak |
|
Mvt(fpc) |
Miocene |
tuffs and tuff breccias |
Fifes Peak Formation,
Chenuis Ridge unit, Clear West Peak |
|
Mvt(fps) |
Miocene |
tuffs and tuff breccias |
Fifes Peak Formation, Sun
Top unit, Clear West Peak |
|
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.) |
|
MOian |
Miocene-Oligocene |
intrusive andesite |
--- |
|
MOigb(s) |
Miocene-Oligocene |
gabbro |
Snoqualmie Batholith |
|
MOigd(s) |
Miocene-Oligocene |
granodiorite |
Snoqualmie Batholith |
|
MOva(eg) |
Miocene-Oligocene |
andesite flows |
Eagle Gorge, volcanic rocks
of |
|
Oir(d) |
Oligocene |
intrusive rhyolite |
Mount Daniel, volcanic
rocks of |
|
Ols(d) |
Oligocene |
mass-wasting deposits,
mostly landslides |
Mount Daniel, rocks of |
|
Ov(d) |
Oligocene |
volcanic rocks |
Mount Daniel, volcanic
rocks of |
|
Ovc |
Oligocene |
volcaniclastic deposits or
rocks |
--- |
|
Ovc(oh) |
Oligocene |
volcaniclastic deposits or
rocks |
Ohanapecosh Formation |
|
Ovr(d) |
Oligocene |
rhyolite flows |
Mount Daniel, volcanic
rocks of |
|
Ovt(d) |
Oligocene |
tuffs and tuff breccias |
Mount Daniel, volcanic
rocks of |
|
Ovt(oh) |
Oligocene |
tuffs and tuff breccias |
Ohanapecosh Formation, Lake
Keechelus tuff member |
|
Ec(1m) |
Eocene |
continental sedimentary
deposits, conglomerate |
Manastash Formation |
|
Ec(1s) |
Eocene |
continental sedimentary
deposits, conglomerate |
Swauk Formation |
|
Ec(1sc) |
Eocene |
continental sedimentary
deposits, conglomerate |
Swauk Formation,
conglomerate facies |
|
Ec(1si) |
Eocene |
continental sedimentary
deposits, conglomerate |
Swauk Formation, ironstone
of |
|
Ec(2na) |
Eocene |
continental sedimentary
deposits, conglomerate |
Naches Formation |
|
Ec(2nag) |
Eocene |
continental sedimentary
deposits, conglomerate |
Guye Sedimentary Member,
Naches Formation |
|
Ec(2nas) |
Eocene |
continental sedimentary
deposits, conglomerate |
Naches Formation, sandstone
and volcanic rocks of |
|
Ec(2pg) |
Eocene |
continental sedimentary
deposits, conglomerate |
Puget Group |
|
Ec(2r) |
Eocene |
continental sedimentary
deposits, conglomerate |
Renton Formation, Puget
Group |
|
Ec(2rl) |
Eocene |
continental sedimentary
deposits, conglomerate |
Roslyn Formation, lower
member of |
|
Ec(2rm) |
Eocene |
continental sedimentary
deposits, conglomerate |
Roslyn Formation, middle
member of |
|
Ec(2ru) |
Eocene |
continental sedimentary
deposits, conglomerate |
Roslyn Formation, upper
member of |
|
Ec(2t) |
Eocene |
continental sedimentary
deposits, conglomerate |
Tiger Mountain Formation,
Puget Group |
|
Eib |
Eocene |
basic intrusive rocks |
--- |
|
Em(2r) |
Eocene |
marine sedimentary rocks |
Raging River Formation |
|
Eva(mp) |
Eocene |
andesite flows |
Mount Persis, volcanic
rocks of |
|
Eva(ss) |
Eocene |
andesite flows |
Silver Pass Member, Swauk
Formation |
|
Eva(t) |
Eocene |
andesite flows |
Taneum Andesite |
|
Evb(fm) |
Eocene |
basalt flows |
Frost Mountain, basalt of |
|
Evb(na) |
Eocene |
basalt flows |
Naches Formation, basalt of |
|
Evb(nap) |
Eocene |
basalt flows |
Naches Formation,
glomeroporphyritic basalt of |
|
Evb(t) |
Eocene |
basalt flows |
Teanaway Basalt |
|
Evc(t) |
Eocene |
volcaniclastic deposits or
rocks |
Tukwila Formation, Puget
Group |
|
Evr(na) |
Eocene |
rhyolite flows |
Naches Formation |
|
Evt(na) |
Eocene |
tuffs and tuff breccias |
Mount Catherine Rhyolite
Member, Naches Formation |
|
Evx(fm) |
Eocene |
volcanic breccia |
Frost Mountain, basalt of |
|
Kit |
Cretaceous |
tonalite |
--- |
|
KJhm(tz) |
Cretaceous-Jurassic |
heterogeneous metamorphic
rocks |
tectonic complex of Stout
(1964) |
|
KJmm(wa) |
Cretaceous-Jurassic |
marine metasedimentary
rocks |
western melange belt,
argillite and graywacke of the |
|
KJu(tz) |
Cretaceous-Jurassic |
ultrabasic rocks |
tectonic zone, rocks of a |
|
Jam(i) |
Jurassic |
amphibolite |
Ingalls tectonic complex |
|
Jam(lm) |
Jurassic |
amphibolite |
Lookout Mountain Formation
of Stout (1964) |
|
Jbg |
Jurassic |
banded gneiss |
--- |
|
Jigb(i) |
Jurassic |
gabbro |
Ingalls tectonic complex |
|
Jigb(lm) |
Jurassic |
gabbro |
Lookout Mountain Formation
of Stout (1964) |
|
Jigb(w) |
Jurassic |
gabbro |
western melange belt, rocks
of the |
|
Jit(qm) |
Jurassic |
tonalite |
Quartz Mountain stock,
eastern melange belt |
|
Jmv(w) |
Jurassic |
metavolcanic rocks |
western melange belt, rocks
of the |
|
Jog(hb) |
Jurassic |
orthogneiss |
Hicks Butte, tonalite
gneiss of |
|
Jph(d) |
Jurassic |
phyllite, low grade |
Darrington Phyllite |
|
Jsc(lm) |
Jurassic |
schist, high grade |
Lookout Mountain Formation
of Stout (1964) |
|
Jsh(s) |
Jurassic |
schist, low grade |
Shuksan Greenschist |
|
Jsh(tz) |
Jurassic |
schist, low grade |
tectonic zone, rocks of a |
|
Ju(i) |
Jurassic |
ultrabasic rocks |
Ingalls tectonic complex |
|
Ju(is) |
Jurassic |
ultrabasic rocks |
Ingalls tectonic complex,
serpentinite of |
|
Ju(w) |
Jurassic |
ultrabasic rocks |
western melange belt, rocks
of the |
|
JTRmt(e) |
Jurassic-Triassic |
metasedimentary and
metavolcanic rocks |
eastern melange belt, rocks
of the |
|
PMmb(e) |
Permian |
marble |
eastern melange belt, rocks
of the |
|
PDmv(np) |
Penn.-Devonian |
metavolcanic rocks |
N Peak, metavolcanic
rocks of |
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