Online Links:
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 1000 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 992 |
| Value | Definition |
|---|---|
| bu | Bedrock of unknown type or age or areas not mapped (unknown age) |
| Ca | Adams Argillite (Cambrian) |
| CDbrv | Volcanic rocks and sills (Pennsylvanian? to Devonian) |
| Clg | Lisburne Group, undivided (Carboniferous) |
| Clgne | Wahoo, Alapah, and Wachsmuth Limestones (Lisburne Group) (Middle Pennsylvanian to Mississippian) |
| Clgtk | Tupik and Kogruk Formations (Lisburne Group) (Pennsylvanian to Upper Mississippian) |
| CPxt | Tindir Group (Cambrian? and Proterozoic) |
| CPxwg | Wales Group, undivided (Cambrian to Proterozoic) |
| CPxwn | Wickersham and Neruokpuk units (Cambrian and Proterozoic) |
| Crc | Rainbow chert (Togiak-Tikchik Complex) (Carboniferous?) |
| Das | Bimodal metavolcanic rocks (Devonian) |
| Dbf | Beaucoup Formation, undivided (Devonian) |
| DCbg | Baird Group and similar rocks (Middle Devonian to upper Cambrian) |
| Dcc | Karheen and Cedar Cove Formations (Devonian) |
| DCmt | Metaturbidite marble and calcareous schist (Nome Complex) (Devonian to Cambrian) |
| DCsp | Schist and phyllite of the Alaska Range (Devonian or older) |
| DCwbl | Farewell basinal facies carbonate rocks (Devonian or older) |
| Degh | Hunt Fork Shale (Endicott Group) (Devonian) |
| Degn | Noatak Sandstone (Endicott Group) (Upper Devonian) |
| Dgb | Gambier Bay Formation, undivided (Devonian) |
| DOgi | Older plutonic rocks of southeast Alaska (Early Devonian to Ordovician) |
| DOls | Thin-bedded limestone (Lower Devonian to Ordovician) |
| DOsc | Shale, chert, and argillite (Lower Devonian to Ordovician) |
| DOtu | Metasedimentary and metavolcanic rocks of Tukpahlearik Creek, undivided (Devonian to Ordovician) |
| DPxcn | Metasedimentary and metavolcanic rocks of the Central Belt and Northern Thrust assemblage of Till and others (2008a) (Devonian to Proterozoic) |
| DPxga | Gneiss, amphibolite, schist, quartzite, and marble (Yukon-Tanana crystalline complex) (Devonian or older) |
| DPxnl | Older carbonate rocks of northern Alaska (Lower Devonian to Proterozoic?) |
| DPxsb | Brooks Range schist belt (Devonian to Proterozoic) |
| DPxsq | Pelitic schist and quartzite and mafic interbeds (Yukon-Tanana crystalline complex) (Devonian and older) |
| DSsm | Shallow-marine, carbonate-dominated rocks (Devonian and Silurian) |
| DSum | Older ultramafic rocks of southeast Alaska (Devonian and Silurian) |
| DSv | Basalt, andesite, and sedimentary rocks (Devonian) |
| Dvec | Woodchopper Volcanics and Schwatka unit of Weber and others (1992) (Devonian) |
| DZwp | Farewell platform facies (Upper Devonian, Frasnian to Neoproterozoic) |
| DZyf | Clastic and carbonate rocks of the Yukon Flats Basin (Devonian to Neoproterozoic?) |
| DZyk | Sedimentary and metasedimentary rocks of York terrane (Lower Devonian to Ordovician) |
| g | Glaciers |
| lPDcf | Calico Bluff and Ford Lake Shale, undivided (Lower Pennsylvanian to Devonian) |
| lPMn | Nuka Formation (Carboniferous) |
| lPsb | Upper Saginaw Bay Formation and similar rocks of southeast Alaska (Pennsylvanian) |
| Jag | Bokan Mountain peralkaline granite and syenite (Middle Jurassic) |
| JDmc | Mystic structural complex, undivided (Jurassic to Devonian) |
| JDoc | Igneous rocks (Angayucham) (Jurassic to Devonian) |
| Jegr | Intermediate to mafic plutonic rocks (Early Jurassic) |
| JlPe | Etivluk Group, undivided (Middle Jurassic to Pennsylvanian) |
| Jk | Graywacke of Kulukak Bay of Hoare and Coonrad (1978) (Upper to Middle Jurassic) |
| Jlmgr | Plutonic rocks (Late and Middle Jurassic) |
| JMct | Cherty tuff and breccia (Angayucham) (Jurassic? to Mississippian) |
| JMps | Clastic and carbonate rocks, Porcupine River region (Jurassic to Mississippian) |
| JPk | Kakhonak Complex and Tlikakila complex of Carlson and Wallace (1983) (Jurassic, Triassic, and older?) |
| JPs | Calcareous and metabasaltic schist and phyllite (Togiak-Tikchik Complex) (Early Jurassic to Permian) |
| JPzc | Chulitna sequence, undivided (Jurassic to upper Paleozoic) |
| JPzs | Northern Alaska sedimentary rocks (Middle Jurassic to Carboniferous) |
| Jsct | Shelikof and Chinitna Formations and Tuxedni Group (Middle Jurassic) |
| Jtk | Talkeetna Formation (Early Jurassic) |
| JTrkp | Limestone and volcanic rocks of the Kenai Peninsula (Early Jurassic and Late Triassic, Norian) |
| JTrmv | Tatina River volcanics of Bundtzen and others (1997a) (Mystic structural complex) (Jurassic and Triassic) |
| JTros | Newenham ophiolite complex (Jurassic and Triassic) |
| JTrsch | Blueschist of southern Alaska (Early Jurassic to Triassic) |
| JTrsr | Spiculitic rocks (Lower Jurassic and Upper Triassic) |
| JZu | Mafic and ultramafic rocks in central, western, and northern Alaska (Jurassic to late Proterozoic) |
| Kcca | Coquina and calcarenite (Lower Cretaceous) |
| Kcgc | Calcareous graywacke and conglomerate (Lower Cretaceous, Albian to Aptian) |
| Kchf | Chugach accretionary complex (Cretaceous) |
| Kcvg | Calcareous graywacke and mudstone, volcanic graywacke, and conglomerate (lower Upper or upper Lower Cretaceous) |
| KDt | Togiak-Tikchik Complex, undivided (Mesozoic to Devonian) |
| Keg | Granodiorite and other plutonic rocks (Early Cretaceous, Aptian to Hauterivian) |
| Kfy | Flysch (Upper and Lower? Cretaceous) |
| Khs | Rocks of Hammond River shear zone of Till and others (2008a) (Cretaceous) |
| Kipc | Mafic igneous-clast conglomerate, sandstone, and mudstone (Lower Cretaceous) |
| KJab | Andesite and basalt (Early Cretaceous and Jurassic) |
| KJgn | Gravina-Nuzotin unit (Lower Cretaceous and Upper Jurassic) |
| KJgu | Plutonic rocks and dikes (Cretaceous to Jurassic) |
| KJs | Fine-grained sedimentary and metasedimentary rocks (Cretaceous or Jurassic) |
| KJse | Saint Elias Suite of Gordey and Makepeace (2003) and similar rocks (Early Cretaceous and Late Jurassic) |
| KJsnk | Staniukovich and Naknek Formations, Kotsina Conglomerate, and similar rocks of southern Alaska (Lower Cretaceous to Jurassic, Pliensbachian) |
| KJvp | Volcano-plutonic complexes (Cretaceous and Jurassic) |
| KJyg | Yakutat Group, undivided (Lower Cretaceous and Upper Jurassic?) |
| KJyh | Graywacke of the Yenlo Hills (Cretaceous? and uppermost Jurassic) |
| Kk | Kuskokwim Group, undivided (Upper Cretaceous to upper Lower Cretaceous) |
| Kke | Kemik Sandstone (Lower Cretaceous, Hauterivian) |
| Kkg | Flysch and quartzite, Kandik Group and equivalents (Lower Cretaceous, Albian to Valanginian) |
| Klgr | Intermediate granitic rocks (Late Cretaceous) |
| Kmgr | Granitic rocks of central and southeast Alaska (Cretaceous, Coniacian to Albian) |
| Kmig | Migmatite and metaplutonic rocks (Cretaceous) |
| KMm | West-central Alaska melange (Angayucham) (Cretaceous or older) |
| Kms | Mafic and shoshonitic volcanic rocks (Early Cretaceous) |
| Kmss | Marine sandstone and siltstone (Cretaceous, Cenomanian to Albian) |
| Kmuc | McHugh and Uyak Complexes and similar rocks (Late Cretaceous) |
| Knmt | Nonmarine to shelf sedimentary rocks (Tertiary? and Cretaceous) |
| Kns | Sedimentary rocks of the North Slope (Cretaceous, Cenomanian to Albian) |
| Kok | Okpikruak and Kongakut Formations (Lower Cretaceous) |
| Kpf | Pedmar Formation (Lower Cretaceous, Albian) |
| Kps | Pelitic schist (Late Cretaceous) |
| KPss | Kingak Shale, Shublik Formation, and Karen Creek Sandstone, undivided (Lower Cretaceous to Permian) |
| KPzum | Mafic and ultramafic rocks in southern Alaska (Cretaceous to late Paleozoic) |
| Ksb | Schrader Bluff Formation (Upper Cretaceous, Maastrichtian to Santonian) |
| Ksbf | Seabee Formation and Hue Shale (Upper Cretaceous, Coniacian to Turonian) |
| Ksfg | Foliated granitic rocks of southeast Alaska (middle Cretaceous?) |
| Ksmd | Shallow to moderate depth sedimentary rocks (Upper Cretaceous to upper Lower Cretaceous) |
| KTrm | Kelp Bay Group, undivided (Cretaceous to Triassic) |
| KTrvs | Volcanic and sedimentary rocks of southwest Alaska (Cretaceous to Triassic?) |
| Kvgc | Volcanic graywacke and conglomerate (Lower Cretaceous, Hauterivian and older) |
| Kvu | Volcanic rocks, undivided (Cretaceous) |
| Kyg | Volcanic graywacke and mudstone (Lower Cretaceous) |
| MDe | Endicott Group, undivided (Mississippian to Devonian) |
| MDegk | Kanayut Conglomerate and Noatak Sandstone, undivided (Endicott Group) (Lower Mississippian and Upper Devonian) |
| MDip | Iyoukeen and Peratrovich Formations (Mississippian and Devonian) |
| MDmg | Granitic rocks and orthogneiss (Mississippian to Devonian) |
| MDts | Totatlanika Schist (Yukon-Tanana crystalline complex) (Early Mississippian to Late Devonian) |
| MDv | Greenstone and schist (Togiak-Tikchik Complex) (Mississippian? and Devonian?) |
| Mgq | Globe quartzite of Weber and others (1992) (Mississippian) |
| Mk | Kayak Shale (Endicott Group) (Mississippian) |
| Mlgac | Akmalik Chert and other black chert of the Lisburne Group (Mississippian) |
| Mlgk | Kuna Formation (Lisburne Group) (Mississippian) |
| Mlgnu | Nasorak and Utukok Formations (Lisburne Group) (Mississippian) |
| MOkg | Kaskawulsh group of Kindle (1953) (Mississippian and older) |
| MPxgs | Gneiss, schist, and amphibolite (Yukon-Tanana crystalline complex) (Mississippian, Devonian, and older) |
| Mzm | Melanges (Mesozoic to Paleozoic) |
| MzPza | Metamorphic rocks of Admiralty Island, undivided (Mesozoic to Paleozoic) |
| MzPzcp | Metamorphic rocks associated with the Coast plutonic complex of Brew and Morrell (1979b) (Triassic to Paleozoic) |
| MzPzka | Kisaralik anticlinorium of Box and others (1993) (Togiak-Tikchik Complex) (Jurassic metamorphism, early Mesozoic or Paleozoic protolith) |
| MzPzmb | Metabasite (Mesozoic and Paleozoic) |
| Oc | Chert of Interior Alaska (Ordovician) |
| OCjr | Jones Ridge Limestone and related units (Ordovician to Cambrian) |
| OCv | Fossil Creek Volcanics and similar rocks (Ordovician and Cambrian) |
| OPxpt | Older rocks of York terrane and Grantley Harbor Fault zone (Middle Ordovician to Proterozoic) |
| Pcs | Clastic and volcaniclastic rocks (Togiak-Tikchik Complex) (Permian) |
| PDcf | Cannery Formation and Porcupine slate of Redman and others (1985), undivided (Permian to Devonian) |
| PDms | Sedimentary rocks of the Mystic structural complex (Permian to Devonian) |
| PIPgi | Granodiorite, syenite, and other granitic rocks (early Permian and Pennsylvanian) |
| PIPsm | Strelna Metamorphics and related rocks (early Permian to Middle Pennsylvanian) |
| Plss | Limestone and calcareous clastic rocks (Permian) |
| Pstc | Step Conglomerate (lower Permian) |
| Pv | Andesite and basalt of southern Alaska (early Permian) |
| Pxkd | Katakturuk Dolomite (Proterozoic) |
| Pxqm | Basement of the White Mountain sequence (Proterozoic) |
| Pxv | Basalt and red beds member (Tindir Group) and Mount Copleston volcanic rocks of Moore (1987) (Proterozoic) |
| Pzc | Marble (early Permian to early Paleozoic) |
| Pzcu | Black chert (lower Paleozoic, Devonian, or older) |
| Pze | Eclogite and associated rocks (Yukon-Tanana crystalline complex) (Paleozoic) |
| Pzkn | Klondike Schist, Keevy Peak Formation, and similar rocks (Yukon-Tanana crystalline complex) (Permian to early Paleozoic) |
| Pzls | Limestone and marble (Paleozoic) |
| Pznp | Metagabbro and metasedimentary rocks (Nome Complex) (Paleozoic?) |
| PzPxgb | Gabbro and metagabbro (early Paleozoic and Proterozoic?) |
| PzPxkg | High-grade metamorphic rocks of the Seward Peninsula (earliest Paleozoic to Proterozoic) |
| PzPxnc | Nome Complex, undivided (early Paleozoic to Proterozoic) |
| PzPxrqm | Pelitic and quartzitic schist of the Ruby terrane (early Paleozoic to Proterozoic?) |
| PzZncl | Layered sequence (Nome Complex) (Devonian to Neoproterozoic) |
| QTgm | Yakataga and Tugidak Formations (Quaternary and uppermost Tertiary) |
| QTm | Contact metamorphosed and hydrothermally altered rocks (Quaternary or late Tertiary) |
| QTs | Unconsolidated and poorly consolidated surficial deposits (Quaternary, Pleistocene, and uppermost Tertiary) |
| QTvi | Young volcanic and shallow intrusive rocks (Quaternary or late Tertiary) |
| QTvs | Kiska Harbor and Milky River Formations (Quaternary? and late Tertiary) |
| SCda | Older rock units of the Doonerak Window (Silurian to Cambrian) |
| SCwbc | Farewell basinal facies clastic rocks (Silurian to upper Cambrian) |
| SOig | Iviagik group of Martin (1970) (Silurian, Llandovery, to Ordovician) |
| SOmi | Heterogeneous metamorphic rocks, southeast Alaska (Silurian and Ordovician) |
| SOpw | Sedimentary and volcanic rocks of Prince of Wales Island (Silurian, Llandovery, and Ordovician) |
| SZfwr | Four Winds complex of Gilbert and others (1987), Retreat Group, and orthogneiss (Silurian to Proterozoic) |
| Tbk | Basalt and keratophyre (Tertiary, Paleogene, or older) |
| Tcb | Coal-bearing sedimentary rocks (Tertiary, Pliocene to Eocene?) |
| Tcc | Gneiss and amphibolite (Tertiary, Miocene) |
| Tcl | Copper Lake Formation (Tertiary, Eocene to Paleocene) |
| Tcp | Younger phase, Coast plutonic complex of Brew and Morrell (1979b) (Tertiary, Eocene) |
| Tcpp | Porphyritic granodiorite phase of Coast plutonic complex of Brew and Morrell (1979b) (Tertiary, Eocene) |
| Tehi | Felsic dikes, sills, and small stocks in southern Alaska (Tertiary and older?) |
| Tgb | Gabbroic rocks in southern Alaska (Tertiary) |
| Thi | Hypabyssal intrusions (Tertiary) |
| Tk | Kootznahoo Formation (Tertiary, lower Miocene to upper Eocene) |
| TKcf | Canning Formation (lower Tertiary, Oligocene? to Cretaceous, Albian) |
| TKgi | Granitic rocks of southern and interior Alaska (Tertiary, Paleocene to Cretaceous, Maastrichtian) |
| TKgr | Ghost Rocks Formation and similar rocks (Tertiary, Paleocene, and Upper Cretaceous) |
| TKkf | Krugoli Formation, undifferentiated (Tertiary, Paleogene, or Cretaceous) |
| TKm | Mafic intrusive rocks (Tertiary to Late Cretaceous or older) |
| Tknt | Nearshore and nonmarine sedimentary rocks in southern Alaska (Tertiary) |
| TKpc | Prince Creek Formation (lower Tertiary, Paleocene, to Upper Cretaceous, Campanian) |
| TKpr | Flows and pyroclastic rocks (early Tertiary to Late Cretaceous) |
| TKs | Conglomerate, sandstone, and lignite (lower Tertiary to Upper Cretaceous) |
| TKtsp | Foliated tonalite sill and pegmatite, Coast plutonic complex of Brew and Morrell (1979b) (Tertiary, Eocene? to latest Cretaceous) |
| Tmi | Younger granitic rocks (Tertiary, Pliocene to Miocene) |
| TMzmb | MacLaren metamorphic belt of Smith and Lanphere (1971) (Tertiary to Jurassic or older?) |
| TMzu | Basement rocks, undifferentiated, Aleutian Islands (Tertiary or older) |
| Tng | Nenana Gravel (Tertiary, Pliocene and upper Miocene) |
| Toeg | Granitic rocks in southern Alaska (Tertiary, Oligocene and Eocene) |
| Togum | Mafic and ultramafic rocks of the Valdez and Orca Groups (Tertiary, Eocene to Paleocene) |
| Togv | Volcanic rocks of the Orca Group and Ghost Rocks Formation (Tertiary, Eocene to Paleocene) |
| Top | Redwood and Poul Creek Formations (Tertiary, Miocene to Eocene?) |
| Tovs | Sedimentary and volcanic rocks of the Orca Group, undivided (Tertiary, Eocene to Paleocene) |
| Tpgi | Granitic intrusive rocks of the Chugach accretionary complex (Tertiary, Paleocene) |
| TPzi | Undivided dikes and sills (Tertiary to Paleozoic?) |
| Tsf | Sagavanirktok Formation (Tertiary, Miocene to Paleocene) |
| Tski | Sitkinak and Sitkalidak Formations (Tertiary, Oligocene to Eocene) |
| Tsmo | Sedimentary rocks of southwest Alaska (Tertiary, Miocene and Oligocene) |
| Tsu | Sedimentary rocks, undivided (Tertiary) |
| Ttsr | Sedimentary rocks of eastern Prince William Sound (Tertiary, Eocene) |
| Tv | Volcanic rocks, undivided (Tertiary) |
| Tvc | Victoria Creek metamorphic rocks (Tertiary, Paleocene metamorphism) |
| Tvcs | Volcanic and sedimentary rocks (Tertiary, Oligocene and Eocene) |
| Tvme | Older volcanic rocks, undivided (Tertiary, early Miocene to Eocene) |
| Tvpm | Younger volcanic rocks, undivided (Tertiary, Pliocene and Miocene) |
| Trcs | Calcareous sedimentary rocks (Upper Triassic, middle? Norian and upper Carnian) |
| TrDtz | Sedimentary rocks and chert (Angayucham) (Triassic to Devonian) |
| Trgs | Shublik Formation and lower Glenn Shale (Triassic) |
| Trhg | Hyd Group, undivided (Upper and Middle Triassic) |
| TrlPms | Skolai and Mankomen Groups, undivided (Triassic to Pennsylvanian) |
| TrlPsf | Flysch-like sedimentary rocks (Triassic to Pennsylvanian) |
| Trmb | Massive basalt and greenstone (Triassic) |
| Trmls | Marble and limestone of Wrangellia (Triassic) |
| TrMsm | Seventymile assemblage (Yukon-Tanana crystalline complex) (Triassic to Mississippian) |
| TrPsg | Sadlerochit Group, undivided (Lower Triassic to Permian) |
| TrPvs | Metamorphic rocks, southeast Alaska (Triassic to Permian) |
| TrPzbi | Metamorphic rocks of Baranof Island (Triassic or older) |
| TrPzgp | Metagraywacke and phyllite (Triassic? and late Paleozoic) |
| Trqd | Quartz diorite and granodiorite (Triassic) |
| Trsf | Shuyak Formation, undivided (Upper Triassic) |
| Xio | Kanektok metamorphic complex and Idono Complex (Paleoproterozoic) |
| Zam | Metasedimentary and metavolcanic rocks of Mount Angayukaqsraq (Neoproterozoic) |
| Zgn | Gneiss of northern Alaska (Neoproterozoic) |
| Value | Definition |
|---|---|
| 4 | Normal fault, location certain |
| 5 | Normal fault, location approximate |
| 6 | Normal fault, location inferred or queried |
| 10 | Thrust fault, location certain; teeth on right from origin |
| 11 | Thrust fault, location approximate; teeth on right from origin |
| 12 | Thrust fault, location inferred or queried; teeth on right from origin |
| 14 | Caldera or crater rim |
| 28 | Concealed caldera or crater rim |
| 30 | Fault, unknown offset, certain location |
| 31 | Fault, unknown offset, approximate location |
| 32 | Fault, unknown offset, inferred location |
| 35 | High-angle reverse fault, certain location |
| 36 | High-angle reverse fault, approximate location |
| 37 | High-angle reverse fault, inferred location |
| 52 | Concealed normal fault |
| 53 | Concealed thrust fault |
| 54 | Concealed high-angle reverse fault |
| 55 | Concealed normal fault having right lateral oblique slip |
| 57 | Concealed right-lateral fault |
| 58 | Concealed left-lateral fault |
| 60 | Concealed fault of uncertain displacement |
| 71 | Normal fault, location certain, having right lateral oblique slip |
| 72 | Normal fault, location approximate, having right lateral oblique slip |
| 76 | Normal fault, inferred or queried, having right lateral oblique slip |
| 87 | Right lateral fault, location certain |
| 88 | Right lateral fault, location approximate |
| 89 | Right lateral fault, inferred or queried |
| 90 | Left lateral fault, location certain |
| 91 | Left lateral fault, location approximate |
This data set represents part of a systematic effort to release geologic map data for the United States in a uniform manner. Geologic data in this data set has been compiled from a wide variety of sources, published and unpublished, ranging from state and regional geologic maps to field mapping.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None.
- Use_Constraints:
- None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data.
This publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
| Data format: | Vector Digital Data Set (Polygon) |
|---|---|
| Network links: |
https://dx.doi.org/10.3133/sim3340 https://pubs.usgs.gov/sim/3340 |