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CLICK ON A COLORED AREA OF THE GEOLOGY MAP TO SHOW INFORMATION HERE |
|
Ec(b) |
Eocene |
continental sedimentary
deposits or rocks |
Barlow Pass Volcanics |
|
Ec(c) |
Eocene |
continental sedimentary
deposits or rocks |
Chuckanut Formation |
|
Ec(cb) |
Eocene |
continental sedimentary
deposits or rocks |
Bellingham Bay Member,
Chuckanut Formation |
|
Ec(cg) |
Eocene |
continental sedimentary
deposits or rocks |
Governor's Point Member,
Chuckanut Formation |
|
Ec(cm) |
Eocene |
continental sedimentary
deposits or rocks |
Maple Falls Member,
Chuckanut Formation |
|
Ec(cp) |
Eocene |
continental sedimentary
deposits or rocks |
Padden Member, Chuckanut
Formation |
|
Ec(cs) |
Eocene |
continental sedimentary
deposits or rocks |
Slide Member, Chuckanut
Formation |
|
Ec(cw) |
Eocene |
continental sedimentary
deposits or rocks |
Warnick Member, Chuckanut
Formation |
|
Ecg(1) |
Eocene, lower |
continental sedimentary
deposits, conglomerate |
--- |
|
Eigd(g) |
Eocene |
granodiorite |
Granite Falls stock and
associated plutons |
|
Em(1) |
Eocene, lower-mid |
marine sedimentary rocks |
Crescent Formation,
sedimentary rocks of |
|
Em(1sb) |
Eocene, lower-mid |
marine sedimentary rocks |
Scow Bay, sandstone of |
|
Em(2a) |
Eocene, mid-upper |
marine sedimentary rocks |
Aldwell Formation |
|
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(2ll) |
Eocene, upper |
marine sedimentary rocks |
Lyre Formation, lower
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(2lu) |
Eocene, upper |
marine sedimentary rocks |
Lyre Formation, upper
sandstone member of |
|
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 |
|
Ev(cf) |
Eocene, lower-mid |
basalt flows and flow
breccias, Crescent Formation |
Crescent Formation, flows
of |
|
Ev(cp) |
Eocene, lower-mid |
basalt flows and flow
breccias, Crescent Formation |
Crescent Formation,
pillowed |
|
Eva |
Eocene |
andesite flows |
--- |
|
Evb(a) |
Eocene, mid-upper |
basalt flows |
Aldwell Formation |
|
Evr |
Eocene |
rhyolite flows |
--- |
|
Evr(c) |
Eocene, lower-mid |
rhyolite flows |
Crescent Formation,
rhyolite flow of |
|
Evt(c) |
Eocene, lower-mid |
tuffs and tuff breccias |
Crescent Formation,
tuffaceous rocks at Striped Peak |
|
Jhmc |
Jurassic |
heterogeneous metamorphic
rocks, chert-bearing |
--- |
|
Ji(f) |
Jurassic |
intrusive rocks, undivided |
Fidalgo ophiolite of Brown
and others (1979) |
|
Jigb(f) |
Jurassic |
gabbro |
Fidalgo ophiolite of Brown
and others (1979) |
|
Jigb(s) |
Jurassic |
gabbro |
Shuksan Greenschist |
|
Jm(fh) |
Jurassic, upper |
marine sedimentary rocks |
Fidalgo igneous complex,
Hunter Bay area |
|
JMmt(t) |
Jurassic-Miss. |
metasedimentary and
metavolcanic rocks |
Trafton terrane of Whetten
and others (1988) |
|
Jmt(l) |
Jurassic |
metasedimentary and
metavolcanic rocks |
Lummi Formation |
|
Jmv |
Jurassic |
metavolcanic rocks |
--- |
|
Jmv(fh) |
Jurassic, mid-upper |
metavolcanic rocks |
Fidalgo igneous complex,
Hunter Bay area |
|
Jmv(h) |
Jurassic |
metavolcanic rocks |
Helena Haystack melange |
|
Jmv(s) |
Jurassic |
metavolcanic rocks |
Shuksan Greenschist |
|
Jph(d) |
Jurassic |
phyllite, low grade |
Darrington Phyllite |
|
Jph(j) |
Jurassic |
phyllite, low grade |
Mount Josephine, semischist
and phyllite of |
|
JPMhmc(e) |
Jurassic-Permian |
heterogeneous metamorphic
rocks, chert bearing |
Elbow Lake Formation |
|
Jsh(s) |
Jurassic |
schist, low grade |
Shuksan Greenschist |
|
JTRmct(o) |
Jurassic-Triassic |
chert-rich marine
sedimentary rocks |
Orcas Chert, Deadman Bay
terrane |
|
JTRmt(e) |
Jurassic-Triassic |
metasedimentary and
metavolcanic rocks |
eastern melange belt, rocks
of the |
|
Ju(f) |
Jurassic |
ultrabasic rocks |
Fidalgo ophiolite of Brown
and others (1979) |
|
Jv(f) |
Jurassic |
volcanic rocks |
Fidalgo ophiolite of Brown
and others (1979) |
|
Jvb(f) |
Jurassic |
basalt flows |
Fidalgo ophiolite of Brown
and others (1979) |
|
Jvb(l) |
Jurassic |
basalt flows |
Lopez structural complex of
Brandon and others (1988) |
|
KJar(f) |
Cretaceous-Jurassic |
argillite |
Fidalgo ophiolite of Brown
and others (1979) |
|
KJm(c) |
Cretaceous-Jurassic |
marine sedimentary rocks |
Constitution Formation,
Decatur terrane |
|
KJm(f) |
Cretaceous-Jurassic |
marine sedimentary rocks |
Fidalgo ophiolite of Brown
and others (1979) |
|
KJm(l) |
Cretaceous-Jurassic |
marine sedimentary rocks |
Lummi Formation |
|
KJm(lc) |
Cretaceous-Jurassic |
marine sedimentary rocks |
Lopez structural complex,
Constitution Formation derivative |
|
KJm(ll) |
Cretaceous-Jurassic |
marine sedimentary rocks |
Lopez structural complex,
Lummi Formation derivative |
|
KJmm(f) |
Cretaceous-Jurassic |
marine metasedimentary
rocks |
Fidalgo ophiolite of Brown
and others (1979) |
|
KJmm(l) |
Cretaceous-Jurassic |
marine metasedimentary
rocks |
Lummi Formation,
metagraywacke of |
|
KJmm(w) |
Cretaceous-Jurassic |
marine metasedimentary
rocks |
western melange belt, rocks
of the |
|
KJms |
Cretaceous-Jurassic |
metasedimentary rocks |
--- |
|
KJms(g) |
Cretaceous-Jurassic |
metasedimentary rocks |
Goat Island area, rocks of
the |
|
KJn(s) |
Cretaceous-Jurassic |
nearshore sedimentary rocks |
Spieden Formation |
|
KJvc(f) |
Cretaceous-Jurassic |
volcaniclastic deposits or
rocks |
Fidalgo ophiolite of Brown
and others (1979) |
|
Km(nc) |
Cretaceous |
marine sedimentary rocks |
Nanaimo Group, Cedar
District Formation |
|
Km(nh) |
Cretaceous |
marine sedimentary rocks |
Nanaimo Group, Haslam
Formation |
|
Km(np) |
Cretaceous |
marine sedimentary rocks |
Nanaimo Group, Protection
Formation |
|
Kn(n) |
Cretaceous |
nearshore sedimentary rocks |
Nanaimo Group |
|
Kn(nc) |
Cretaceous |
nearshore sedimentary rocks |
Nanaimo Group, Comox
Formation |
|
Kn(ne) |
Cretaceous |
nearshore sedimentary rocks |
Nanaimo Group, Extension
Formation |
|
Kvb(lr) |
Cretaceous |
basalt flows |
Lopez Island, basalts of
Richardson |
|
MOm(p) |
Miocene-Oligocene |
marine sedimentary rocks |
Pysht Formation, upper Twin
River Group |
|
MZmm(h) |
Mesozoic |
marine metasedimentary
rocks |
Helena Haystack melange |
|
MZu(h) |
Mesozoic |
ultrabasic rocks |
Helena Haystack melange |
|
OEc(b) |
Oligocene-Eocene |
continental sedimentary
deposits or rocks |
Bulson Creek of Lovseth
(1975), rocks of |
|
OEc(h) |
Oligocene-Eocene |
continental sedimentary
deposits or rocks |
Huntingdon Formation |
|
OEm |
Oligocene-Eocene |
marine sedimentary rocks |
Western Olympic lithic
assemblage |
|
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(ms) |
Oligocene-Eocene |
marine sedimentary rocks |
Marrowstone Shale of Durham
(1944) |
|
OEm(q) |
Oligocene-Eocene |
marine sedimentary rocks |
Quimper Sandstone of Durham
(1944) |
|
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 |
|
OEn(b) |
Oligocene-Eocene |
nearshore sedimentary rocks |
Bulson Creek of Lovseth
(1975), rocks of |
|
OEvb |
Oligocene-Eocene |
basalt flows |
--- |
|
pDgn(y) |
pre-Devonian |
gneiss |
Yellow Aster Complex of
Misch (1966) |
|
pDi(t) |
pre-Devonian |
intrusive rocks, undivided |
Turtleback Complex |
|
pDit(t) |
pre-Devonian |
tonalite |
Turtleback Complex |
|
Pigbd(t) |
Pennsylvanian |
gabbro and diorite |
Trafton terrane of Whetten
and others (1988) |
|
PMDhm(c) |
Permian-Devonian |
heterogeneous metamorphic
rocks |
Chilliwack Group of Cairnes
(1944) |
|
PMDmb(c) |
Permian-Devonian |
marble |
Chilliwack Group of Cairnes
(1944) |
|
PMDms(c) |
Permian-Devonian |
metasedimentary rocks |
Chilliwack Group of Cairnes
(1944) |
|
PMDmv(c) |
Permian-Devonian |
metavolcanic rocks |
Chilliwack Group of Cairnes
(1944) |
|
PMDvs(e) |
Permian-Devonian |
volcanic and sedimentary
rocks |
East Sound Group |
|
PMDvs(e) |
Permian-Devonian |
volcanic and sedimentary
rocks |
East Sound Group |
|
pPMsc(g) |
pre-Permian |
schist, high grade |
Garrison Schist |
|
pTms(b) |
pre-Tertiary |
metasedimentary rocks |
Bald Mountain, conglomerate
of |
|
pTu |
pre-Tertiary |
ultrabasic rocks |
--- |
|
pTu(ts) |
pre-Tertiary |
ultrabasic rocks |
Twin Sisters Dunite |
|
Qa |
Holocene |
alluvium |
--- |
|
Qa(c) |
Holocene |
alluvium |
clay and silt |
|
Qa(s) |
Holocene |
alluvium |
sand |
|
Qad |
Pleistocene |
alpine glacial drift,
Fraser-age |
--- |
|
Qaf |
Holocene |
alluvial fan deposits |
--- |
|
Qao |
Pleistocene |
alpine glacial outwash,
Fraser-age |
--- |
|
Qat |
Pleistocene |
alpine glacial till,
Fraser-age |
--- |
|
Qat(e) |
Pleistocene |
alpine glacial till,
Fraser-age |
Evans Creek Drift, till
deposits |
|
Qb |
Holocene |
beach deposits |
--- |
|
Qc |
Pleistocene |
continental sedimentary
deposits or rocks |
pre-Fraser nonglacial seds,
undiff. |
|
Qc(o) |
Pleistocene |
continental sedimentary
deposits or rocks |
Olympia-age nonglacial
sediments |
|
Qc(w) |
Pleistocene |
continental sedimentary
deposits or rocks |
Whidbey Formation |
|
Qd |
Holocene |
dune sand |
--- |
|
Qf |
Holocene |
artificial fill, including
modified land |
--- |
|
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) |
|
Qgac |
Pleistocene |
advance glacial outwash,
silt and clay, Fraser-age |
mostly Vashon Stade in
western WA; unnamed in eastern WA |
|
Qgas |
Pleistocene |
advance glacial outwash,
sand, 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(e) |
Pleistocene |
continental glacial drift,
Fraser-age |
Everson Interstade |
|
Qgd(s) |
Pleistocene |
continental glacial drift,
Fraser-age |
Sumas Stade |
|
Qgdc |
Pleistocene |
glacial and non-glacial
deposits, Fraser-age |
--- |
|
Qgdm |
Pleistocene |
glaciomarine drift,
Fraser-age |
may correlate with Everson
Interstade |
|
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 |
|
Qgm(e) |
Pleistocene |
continental glacial
moraines, Fraser-age |
Everson Interstade,
morainal deposits of |
|
Qgo |
Pleistocene |
continental glacial
outwash, Fraser-age |
mostly Vashon Stade in
western WA; unnamed in eastern WA |
|
Qgo(e) |
Pleistocene |
continental glacial
outwash, Fraser-age |
Everson Interstade, outwash
deposits of |
|
Qgo(es) |
Pleistocene |
continental glacial
outwash, Fraser-age |
Everson or Sumas, outwash
deposits of |
|
Qgo(i) |
Pleistocene |
continental glacial
outwash, Fraser-age |
ice-contact recessional
outwash |
|
Qgo(s) |
Pleistocene |
continental glacial
outwash, Fraser-age |
Sumas Stade, outwash of |
|
Qgoc |
Pleistocene |
continental glacial
outwash, silt and clay, Fraser-age |
mostly Vashon Stade in
western WA; unnamed in eastern WA |
|
Qgocm |
Pleistocene |
glacial outwash,marine,silt
and clay,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 |
|
Qgogm(p) |
Pleistocene |
glacial outwash, marine,
gravel, Fraser-age |
Partridge gravel, Whidbey
Island |
|
Qgom |
Pleistocene |
continental glacial
outwash, marine, Fraser-age |
mostly Vashon Stade in
western WA; unnamed in eastern WA |
|
Qgom(e) |
Pleistocene |
continental glacial
outwash, marine, Fraser-age |
Everson Glaciomarine Drift,
outwash, marine |
|
Qgom(ee) |
Pleistocene |
continental glacial
outwash, marine, Fraser-age |
Everson Glaciomarine Drift,
emergence beach deposits of |
|
Qgom(es) |
Pleistocene |
continental glacial
outwash, marine, Fraser-age |
Everson Glaciomarine Drift,
San Juan Island |
|
Qgom(s) |
Pleistocene |
continental glacial
outwash, marine, Fraser-age |
Sumas Stade |
|
Qgos |
Pleistocene |
continental glacial
outwash, sand, Fraser-age |
mostly Vashon Stade in
western WA; unnamed in eastern WA |
|
Qgosm |
Pleistocene |
glacial outwash, marine,
sand, Fraser-age |
mostly Vashon Stade in
western WA; unnamed in eastern WA |
|
Qgp |
Pleistocene |
continental glacial drift,
pre-Fraser |
--- |
|
Qgpc |
Pleistocene |
glacial drift, pre-Fraser,
and nonglacial deposits |
--- |
|
Qgpm |
Pleistocene |
glaciomarine drift,
pre-Fraser |
--- |
|
Qgt |
Pleistocene |
continental glacial till,
Fraser-age |
mostly Vashon Stade in
western WA; unnamed in eastern WA |
|
Qgt(s) |
Pleistocene |
continental glacial till,
Fraser-age |
Sumas Stade, till of the |
|
Qguc |
Pleistocene |
glacial and non-glacial
deposits, undivided |
Fraser and pre-Fraser
deposits |
|
Qls |
Holocene-Pleistocene |
mass-wasting deposits,
mostly landslides |
--- |
|
Qoa |
Holocene |
alluvium, older |
--- |
|
Qoa(c) |
Holocene |
alluvium, older |
clay and silt facies |
|
Qoa(s) |
Holocene |
alluvium, older |
sand facies |
|
Qp |
Holocene-Pleistocene |
peat deposits |
--- |
|
Qs |
Pleistocene |
sedimentary deposits or
rocks |
--- |
|
Qta |
Holocene-Pleistocene |
talus deposits |
--- |
|
Qvl(k) |
Holocene-Pleistocene |
lahars |
Kennedy Creek assemblage |
|
Qvl(m) |
Pleistocene |
lahars |
Middle Fork Nooksack River,
lahar deposits of |
|
Tc |
Tertiary |
continental sedimentary
deposits or rocks |
--- |
|
TRn(h) |
Triassic |
nearshore sedimentary rocks |
Haro Formation |
|
TRPMv(d) |
Triassic-Permian |
volcanic rocks |
Deadman Bay, volcanics of |
|
tz |
--- |
tectonic zone |
Lopez structural complex |
|
tz(o) |
--- |
tectonic zone |
Orcas Island, tectonic zone
on |
|
wtr |
--- |
water |
--- |
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