nm
Unmapped
bu
Bedrock
g
Ice fields or glaciers
Water (streams, lakes, ocean)
Qs
Surficial deposits, undifferentiated
Qtf
Tidal flat and estuarine deposits, offshore, subject to inundation
Qad
Avalanche deposits
Qa
Alluvium
Qaf
Alluvial fan deposits
Qao
Older alluvial fans
Qafs
Alluvial deposits, Partially submerged alluvial fans and cones
Qc
Colluvium
Qaft
Talus and rubble deposits
Qcb
Bluff colluvium
Qcf
Fine-grained colluvial deposits, may be solifluction related?
Qcs
Deposits of steep alpine fans, intermediate between alluvial fans and talus cones
Qls
Landslide deposits
Qlsm
Mudflow and debris-flow deposits
Qoa
Older alluvium
Qoo
Alluvial plains; may include outwash
Qt
Terrace deposits
Qto
High level, older terrace deposits
Qac
Abandoned channel deposits
Qacc
Abandoned channel deposits, possibly due to catastrophic draining of a glacial lake.
Ql
Lacustrine deposits
Qsw
Swamp deposits
Qlv
Levee deposits
Qb
Beach deposits
Qbe
Beach deposits, elevated beach ridges
Qes
Estuarine deposits
Qmt
Marine and lake terrace deposits
Qlt
Lake terrace deposits
Qms
Mineral spring deposits
Qda
Active dune deposits
Qd
Dune deposits
Active dunes
Qdi
Inactive dunes
Qds
Sand sheets (sandur)
Qfl
Loess, Fairbanks loess
Qsu
Frozen silt, undifferentiated
Qglf
Glacial outwash derived fans deposited in ephermeral glacial lakes
Qgl
Glaciolacustrine deposits
Glaciolacustrine deposits associated with older glacial deposits, early Wisconsin or older
Qm
Glacial deposits, undivided, of Holocene and/or Pleistocene age
Qsg
Superglacial drift
Qrg
Rock glacier deposits
Qsf
Solifluction deposits
Qek
Esker deposits
Esker deposits associated with older glacial deposits, early Wisconsin or older
Qnd
Drift, neoglacial
Qlia
Moraine of Little Ice Age glacial advance
Qng
Moraine of pre-Little Ice Age glacial advances
Qno
Outwash deposits, Neoglaciation
Qwu
Drift, undivided, Wisconsin-age Glaciations:  Aleknagik, Brooks Lake, Naptowne, Donnelly
Qwub
Drift, undivided, Wisconsin-age Glaciations:  Brooks Lake
Qwua
Drift, undivided, Wisconsin-age Glaciations:  Aleknagik, mostly ground and younger drift deposits
Qwun
Drift, undivided, Wisconsin-age Glaciations:  Naptowne
Qwud
Drift, undivided, Wisconsin-age Glaciations:  Donnelly
Qwui
Drift, undivided, Wisconsin-age Glaciations:  Itkillik age
Qw4
Riley Creek glaciation, also Brooks Lake, Iliuk, late Wisconsin
Qw4t
Elmendorf/Tanya advance, Naptowne Glaciation, latest Wisconsin
Qw3
Till, Brooks Lake, Newhalen
Qw3s
Till, Naptowne, Skilak
Qw3i
Drift, Wisconsin-age Glaciations:  Late Itkillik age
Qw2
Till, Brooks Lake, Iliamna
Qw2a
Drift, Wisconsin-age Glaciations:  Aleknagik
Qw2ad
Drift, other than ground moraine, Wisconsin-age Glaciations:  Aleknagik
Qw2k
Drift, Wisconsin-age Glaciations:  Naptowne, Killey
Drift, Wisconsin-age Glaciations:  Itkillik II age
Qw1
Till, last glacial maximum (LGM)
Qw1k
Till, Brooks Lake, Kvichak
Qw1o
Glacial deposits of the Okstukuk glaciation
Qw1m
Glacial deposits of the Naptowne glaciation, Moosehorn Stade
Qwo
Outwash deposits, Late Wisconsin-age Glaciations;  Outwash, Riley Creek Glaciation, late Wisconsin
Qw3o
Latest Wisconsin outwash deposits
Qw2o
Mid-range Late Wisconsin outwash deposits
Earliest Late Wisconsin outwash deposits
Qoc
Channeled glacial deposits -- kame and kettle?
Qwd
Drumlin deposits in ground moraine fields of Brooks Lake glacial deposits
Kame fields, and a few narrow and sinuous eskers that contain mainly gravel and sand, poorly to well-bedded and sorted
Morainal deposits inferred to have been modified during glacioestuarine or glaciolacustrine inundation
Deposits of complex origin in the central Cook Inlet basin
Glacio-estuarine deposits, Pleistocene
Qesh
Glacio-estuarine deposits, Hood Lake deposits, overlie Bootlegger Cove Formation, Anchorage vicinity, Pleistocene
Qbc
Glacio-estuarine deposits, Bootlegger Cove Formation, Anchorage vicinity, Pleistocene
Qrd
Rock-defended terraces
Qat
Altiplanation terraces
Qdl
Deltaic deposits, including outwash and alluvial deposits
Qew
Glaciations of early Wisconsin age:  Mak Hill, Healy, Eklutna, Iowithla
Qewm
Glaciations of early Wisconsin age:  Mak Hill
Qewi
Glaciations of early Wisconsin age:  Iowithla
Qewk
Glaciations of early Wisconsin age:  Knik
Glaciations of early Wisconsin or late Sangamon (Late stage 5) age:  Itkillik I
Qewd
Drumlins associated with early glaciations
Early Wisconsin or late Sangamon (late stage 5) kame and kame terraces deposits
Qewg
Early Wisconsin ground moraine
Early Wisconsin ground moraine, Mak Hill
Early Wisconsin ground moraine, Iowithla
Early Wisconsin ground moraine, Knik terraced moraines
Qewo
Older Wisconsin age outwash
Qmo
Older Wisconsin age outwash, Mak Hill
Qio
Older Wisconsin age outwash, Iowithla
Qko
Older Wisconsin age outwash, Knik
Older Wisconsin age or late Sangamon (late stage 5) outwash, Itkillik I
Qiu
Illinoian glaciations
Qig
Illinoian glaciations, ground moraine
Qmik
Illinoian glaciations, kame deposits
Outwash older than Wisconsin-age
Deposits related to but peripheral to older glaciations, primarily associated with Cook Inlet region
Tmu
Pliocene(?) glaciations
Tmo
Pliocene(?) glaciations, outwash
Qfr
Fringing and fossil carbonate reefs
Qsb
Scoured bedrock; may be covered with thin glacially derived deposits
QTs
Surficial deposits, undivided
QTmb
Semiconsolidated marine beach deposits
QTts
Tilted sedimentary rocks at South Bight, Amchitka Island
QTg
High-level gravel
QTf
Faneto Formation
Qpm
Placer and anthropogenic deposits
Qv
Volcanic rocks, undivided
Qw
Wrangell Lava, younger part
Qww
Wrangell Lava, younger part, Wrangell Volcano shield lavas
Qwwv
Wrangell Lava, younger part, Wrangell Volcano, valley-fill lavas
Qwwd
Wrangell Lava, younger part, Mt. Drum Volcano lava flows
Qwws
Wrangell Lava, younger part, Mt. Sanford Volcano lava flows
Qwwc
Wrangell Lava, younger part, Capital Volcano shield and intracaldera lavas
Qwwt
Wrangell Lava, younger part, Mt. Tanada shield and intracaldera lavas
Qhv
Holocene volcanic rocks
Qhvd
Domes associated with Holocene volcanic centers
Qpd
Pyroclastic (Ash and debris flow) deposits
Qafd
Ash-flow and ash-fall deposits
Qtph
Ash-fall deposits
Ash-flow tuff and air fall of Aniakchak caldera
Qdf
Debris-flow deposits
Qdfo
Debris-flow deposits, older Redoubt, still Holocene
Qdfy
Debris-flow deposits, younger Redoubt, late Holocene
Qmf
Mudflow deposits
Qav
Volcanic avalanche deposits
Qshc
Hyaloclastite or aquagene tuff
Qvs
Bedded volcanic sediments
Cinder and spatter cones
Pit craters and calderas {feature, not really unit}
Qed
Explosion debris
Qedm
Explosion debris, maar deposits
Qvb
Basalt of Togiak River Valley, or basalt flows
Tholeiitic basalt of Mekoryuk, Brunhes, normally magnetized
Qvt
Trachyte flows
Qvm
Mugearite and benmoreite flows
Qva
Andesite and low silica dacite
Qvda
Dacite and rhyodacite
Qvr
Rhyolite
Qvd
Viscous domes in young Hawaiian volcanic rocks, Hawi and Laupahoehoe Volcanic Series
Qvdt
Viscous domes in young Hawaiian volcanic rocks, trachyte
Qvdm
Viscous domes in young Hawaiian volcanic rocks, mugearite and benmoreite
Qvdb
Viscous domes in young Hawaiian volcanic rocks, basalt
Qgm
Small masses of gabbro in young Hawaiian volcanic rocks, Kahuku Volcanic Series
QTb
Basalt
Qbmr
Tholeiitic basalt of Mekoryuk, Matuyama, reversally magnetized
Qbm
Tholeiitic basalt of Mekoryuk, Matuyama, normally magnetized
Qhvu
West Molokai Volcanic Series (upper), Kanapou Volcanic Series (lower), East Molokai, Lanai, Honolua, Wailuku, Honomanu, Plololu, Hamakua, and Ninole Volcanic Series - Early Pleistocene
Qwj
Wrangell Lavas, Mt. Jarvis volcanoes shield and intracaldera lavas
Qhcu
West Molokai Volcanic Series (upper) and East Molokai, Lanai, Honolua, Honomanu, Kanapou, Pololu, and Hamakua Volcanic Series cinder, spatter, and littoral cones
East Molokai Volcanic Series (upper), Honolua Volcanic Series viscous domes
Qhgm
West Molokai Volcanic Series (lower) and Wailuku, Kula, Kanapou, and Pololu Volcanic Series, gabbro masses
Qhvl
Koolau and West Molokai (lower) Volcanic Series - Early Pleistocene
Qhcl
Koolau and West Molokai (lower) Volcanic Series, cinder, spatter, and littoral cones
Qi
Intrusive rocks, undivided
Qvdr
Dacitic to rhyolitic domes
Qwdr
Wrangell Lavas, Mt. Drum volcano domes, dacite and rhyolite
Qwsr
Wrangell Lavas, Mt. Sanford volcano dome, rhyolite
Qwjd
Wrangell Lavas, Mt. Jarvis volcanoes, dome, dacite
Qanp
Andesite plug domes
Radial dike swarm and plug
Qbd
Basalt dome
QTv
Quaternary and/or Tertiary volcanic rocks, undifferentiated
QTa
Andesitic lava
QTd
Dacite
QTr
QTob
Olivine basalt flows
QTw
Wrangell Lava
QTi
Intrusive rocks
QTqk
Quartz keratophyre dikes
QTad
Porphyritic dikes and stocks of hornblende andesite and dacite
QTwr
Wrangell Lava, rhyodacite and rhyolite domes and associated pyroclastic rocks
QTvb
Pochnoi Volcanics - Tuff-breccia, lava flows, and agglomerate, largely basaltic
QTva
Quaternary and/or Tertiary pyroclastic flow deposits
QTk
Kiska Harbor Formation
QTkb
Kiska Harbor Formation, breccia member
QTkf
Kiska Harbor Formation, flow member
QTkv
Kula volcanic series and equivalents, undivided
QTkp
Kula volcanic series and equivalents, pyroclastic rocks and tuff
QTc
Quaternary or Tertiary metamorphic rocks, particularly in Mt. Dana area on Port Moller map
Bedrock, all types