The data was compiled largely from geologic field data collected between 1953 and 1986 by the U.S. Geological Survey and published as 1:250,000 scale geologic quadrangle maps. Additional data for parts of the Wiseman, Ruby, Medfra, and Ophir quadrangles came from 1:63,360 scale quadrangle map published by the Alaska Division of Geological and Geophysical Surveys. This compilation also incorporates unpublished field data.
This data set is also a portion of a statewide geology database, which is being compiled by the U.S. Geological Survey's National Surveys and Analysis (NSA) project, whose goal is to compile geologic, geochemical, geophysical, and other data.
Wilson, F.H., Labay, K.A., Shew, N.B., and Mohadjer, Solmaz, 2005, Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for the Yukon-Koyukuk basin, Alaska: United States Geological Survey OFR 2005-1341.Online Links:
- http://pubs.usgs.gov/of/2005/1341/
This is a Vector data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.000256
Ordinates (y-coordinates) are specified to the nearest 0.000256
Planar coordinates are specified in meters
Value | Definition |
---|---|
100 | Qua - Surficial deposits, undifferentiated (Quaternary); age 0-1.6 my |
102 | Water |
105 | Qf - Floodplain and tidal flats deposits (Holocene); age 0-1.6 my |
107 | Qua - Surficial deposits, undifferentiated (Quaternary); age 0-1.6 my |
108 | Qua - Surficial deposits, undifferentiated (Quaternary); age 0-1.6 my |
110 | Qua - Surficial deposits, undifferentiated (Quaternary); age 0-1.6 my |
111 | Qf - Floodplain and tidal flats deposits (Holocene); age 0.01-1.6 my |
116 | Qf - Floodplain and tidal flats deposits (Holocene); age 0-0.01 my |
119 | Qsa - Actively drifting and recently stabilized dune fields (Holocene); age 0-0.01 my |
120 | Qs - Eolian and water-laid sand and silt sheets and stabilized dune fields (Holocene and Pleistocene); age 0-1.6 my |
125 | QTgl - Glacial and glaciolacustrine deposits (Pleistocene and Pliocene?); age 0-1.6 my |
135 | QTgl - Glacial and glaciolacustrine deposits (Pleistocene and Pliocene?); age 0.01-1.6 my |
190 | QTgl - Glacial and glaciolacustrine deposits (Pleistocene and Pliocene?); age 0.06-1.6 my |
285 | QTgr - Quartz gravel deposits (Quaternary or Tertiary); age 0.01 - 5.3 my |
300 | Qab - Alkalic basalt cones and flows (Pleistocene); age 0-1.6 my |
305 | Qtb - Tholeiitic basalt cones and flows (Holocene? and Pleistocene); age 0-0.01 my |
350 | QTb - Basalt flows (Pleistocene and Pliocene); age 0.01-5.3 my |
640 | Ts - Small deposits of nonmarine conglomerate, sandstone, shale, and coal (Tertiary); age 5.3-57.8 my |
1002 | Td - Dacite and rhyolite lava flows, domes, and volcaniclastic rocks (Eocene and Paleocene); age 1.6-66.4 my |
1004 | Tb - Basalt flows (Oligocene); age 1.6-66.4 my |
1011 | Thr - Rhyolite hypabyssal bodies (Miocene to Paleocene, mostly Early Tertiary or Eocene?); age 1.6-66.4 my |
1081 | Tad - Andesite and basalt lava flows and volcaniclastic rocks and dacite and rhyolite lava flows, domes, and volcaniclastic rocks, undivided (Eocene and Paleocene); age 39-49 my |
1103 | Ta - Andesite and basalt lava flows and volcaniclastic rocks (Eocene and Paleocene); age 36.6-84 my |
1120 | Tt - Tuff and tuff breccia (Eocene and Paleocene); age 36.6-66.4 my |
1320 | Tg - Granite (Eocene or Paleocene); age 57.8-66.4 my |
1600 | TKad - Andesite and basalt lava flows and volcaniclastic rocks and dacite and rhyolite lava flows, domes, and volcaniclastic and hypabyssal rocks, undivided (early Tertiary and Late Cretaceous); age 52-84 my |
1601 | TKi - Shallow intrusive rocks of silicic and intermediate composition (Tertiary and Late Cretaceous); age 23.7-97.5 my |
1602 | TKi - Shallow intrusive rocks of silicic and intermediate composition (Tertiary and Late Cretaceous); 57.8-84 my |
1603 | TKd - Dacite and rhyolite lava flows, domes, and volcaniclastic and hypabyssal rocks (early Tertiary and Late Cretaceous); age 23.7-97.5 my |
1605 | TKa - Andesite and basalt lava flows and volcaniclastic rocks (early Tertiary and Late Cretaceous); age 23.7-97.5 my |
1620 | TKi - Shallow intrusive rocks of silicic and intermediate composition (Tertiary and Late Cretaceous); age 1.6-97.5 my |
1630 | TKvc - Volcano-plutonic complexes (early Tertiary and Cretaceous); age 23.7-97.5 my |
1641 | TKi - Shallow intrusive rocks of silicic and intermediate composition (Tertiary and Late Cretaceous); age 23.7-97.5 my |
1650 | TKi - Shallow intrusive rocks of silicic and intermediate composition (Tertiary and Late Cretaceous); age 23.7-97.5 my |
1655 | TKg - Granite and granodiorite (early Tertiary and Late Cretaceous); age 23.7-97.5 my |
1660 | TKm - Monzonite (early Tertiary and Late Cretaceous); age 23.7-97.5 my |
1680 | TDg - Gabbro and diabase (Tertiary? to Devonian?); age 1.6-408 my |
1815 | Kcc - Carbonate-clast conglomerate, sandstone and shale (Cretaceous); age 66.4-144 my |
1820 | Kcvg - Carbonate- and volcanic-clast graywacke and mudstone (Cretaceous); age 66.4-144 my |
1821 | Kcg - Carbonate-clast graywacke and mudstone (Cretaceous); age 66.4-144 my |
1822 | Kcc - Carbonate-clast conglomerate, sandstone, and shale (Cretaceous); age 66.4-144 my |
1823 | Kcvg - Carbonate- and volcanic-clast graywacke and mudstone (Cretaceous); age 66.4-144 my |
1905 | Ksu - Shale, siltstone, and sandstone, undivided (Cretaceous); age 74.5-87.5 my |
1906 | Ksu - Shale, siltstone, and sandstone, undivided (Cretaceous); age 66.4-97.5 my |
1940 | Kss - Shallow marine sandstone, siltstone, and shale (Late Cretaceous); age 91-144 my |
1941 | Ks - Fluvial and shallow marine sandstone and shale, undivided (Cretaceous); age 66.4-97.5 my |
1942 | Ksu - Shale, siltstone, and sandstone, undivided (Cretaceous); age 66.4-113 my |
1970 | Ksu - Shale, siltstone, and sandstone, undivided (Cretaceous); age 66.4-113 my |
1971 | Kss - Shallow marine sandstone, siltstone, and shale (Late Cretaceous); age 66.4-113 my |
1985 | Ksc - Fluvial and shallow marine sandstone and conglomerate (Late Cretaceous); age 66.4-113 my |
1990 | Kqc - Quartz- and metagraywacke-clast conglomerate, sandstone, and shale (Cretaceous); age 91-144 my |
2020 | Ks - Fluvial and shallow marine sandstone and shale, undivided (Cretaceous); age 66.4-144 my |
2021 | Ks - Fluvial and shallow marine sandstone and shale, undivided (Cretaceous); age 88.5-113 my |
2023 | TKic - Complexes of shallow intrusive rocks and altered Cretaceous sedimentary rocks of the Yukon-Koyukuk basin, undivided (early Tertiary and Cretaceous); age 57.8-113 my |
2030 | Kmc - Mafic igneous-clast conglomerate, sandstone, and mudstone (Cretaceous); age 91-113 my |
2101 | Kms - Marine sandstone and siltstone (Cretaceous); age 91-113 my |
2106 | Kvc - Volcanic-clast conglomerate, sandstone, and shale (Cretaceous); age 66.4-144 my |
2125 | Kqs - Quartz-carbonate sandstone (Early Cretaceous); age 131-144 my |
2152 | Kcs - Offshore calcareous sandstone, siltstone, and shale (Cretaceous); age 97.5-144 my |
2180 | Kvg - Volcanic-clast graywacke and mudstone (Cretaceous); age 97.5-144 my |
2182 | Kgc - Volcanic graywacke and conglomerate (Early Cretaceous?); age 119-144 my |
2210 | Krd - Rhyolite, dacite, and trachyte lava flows and volcaniclastic rocks (Late Cretaceous); age 57.8-97.5 my |
2320 | Ktg - Tuff, volcanic graywacke, and mudstone (Early Cretaceous); age 97.5-144 my |
2330 | Kv - Andesite and basalt lava flows and volcaniclastic rocks (Early Cretaceous); age 97.5-163 my |
2335 | Kbd - Spilitic basalt and diabase (Early Cretaceous); age 97.5-144 my |
2336 | Kft - Shoshonitic tuffs and lava flows (Early Cretaceous); age 113-124 my |
2410 | Kgu - Granitic rocks of uncertain affinities (Cretaceous?); age 66.4-144 my |
2420 | Kgd - Granodiorite and granite (Late Cretaceous); age 66.4-144 my |
2460 | Ksm - Syenite and monzonite (Late Cretaceous); age 66.4-88.5 my |
2515 | Kgr - Granite and granodiorite (Early Cretaceous); age 110-144 my |
2530 | Kgr - Granite and granodiorite (Early Cretaceous); age 110-144 my |
2535 | Knsy - Syenite, monzonite, and nepheline syenite; nepheline syenite unit (Early Cretaceous); age 97.5-144 my |
2545 | Ksy - Syenite, monzonite, and nepheline syenite (Early Cretaceous); 97.5-144 my |
3380 | Jgt - Trondhjemite and tonalite (Late and Middle Jurassic); age 131-152 my |
3496 | MzPzum - Mafic-ultramafic complexes (Mesozoic and Paleozoic?); age 152-570 my |
3497 | MzPzum - Mafic-ultramafic complexes (Mesozoic and Paleozoic?); age 152-570 my |
3498 | MzPzum - Mafic-ultramafic complexes (Mesozoic and Paleozoic?); age 152-570 my |
3851 | JMc - Chert, cherty tuff, argillite, crystal-lithic tuff, volcanic breccia, and conglomerate (Jurassic? to Mississippian); age 200-360 my |
4032 | Trs - Spiculite and sandy limestone (Late Triassic); age 208-225 my |
5021 | TrMg - Graywacke, grit, and argillite (Triassic? to Mississippian?); age 187-360 my |
5131 | TrMbc - Pillow basalt, chert, and minor agglomerate (Triassic? to Mississippian?); age 208-408 my |
5140 | JDv - Altered basalt, gabbro, chert, argillaceous rocks, tuff, graywacke, and carbonate rocks (Jurassic to Devonian); age 144-360 my |
5145 | KJm - Melange (Early Cretaceous? and Jurassic); age 144-408 my |
5150 | MzPzum - Mafic-ultramafic complexes (Mesozoic and Paleozoic?); age 187-286 my |
5241 | MzZma - Metabasite (Mesozoic? to Proterozoic?); age 66.4-570 my |
5242 | MzZmr - Metabasite (Mesozoic? to Proterozoic?); age 245-900 my |
5243 | MzZms - Metabasite (Mesozoic? to Proterzoic?); age 66.4-570 my |
5280 | JDv - Altered basalt, gabbro, chert, argillaceous rocks, tuff, graywacke, and carbonate rocks (Jurassic to Devonian); age 187-360 my |
5295 | MzZfm - Metabasite and felsic schist, undivided (Mesozoic? to Proterozoic?); age 66.4-2500 my |
5310 | DCd - East Fork Hills Formation (Devonian to Cambrian); age 374-570 my |
5320 | Pzcs - Carbonate rocks (Paleozoic); age 360-570 my |
5321 | PzZus - Pelitic schist, calc schist, and quartzite and carbonate rocks, undivided (Paleozoic and Proterozoic?); age 360-570 my |
5322 | PzZss - Pelitic schist, calc schist, and quartzite (Paleozoic and Proterozoic?); age 360-570 my |
5340 | Pzcr - Carbonate rocks (Paleozoic); age 245-900 my |
5521 | MzZrc - Complex of the Reindeer Hills (Mesozoic to Proterozoic?); age 245-570 my |
5525 | Pzca - Carbonate rocks (Paleozoic); age 245-408 my |
5542 | MzPzq - Quartzite, grit, argillite, and quartz-mica schist (Early Paleozoic and Proterozoic?); age 144-900 my |
5560 | Pzpa - Phyllite and subordinate metagraywacke (Paleozoic?); age 245-408 my |
5561 | Pzpr - Phyllite (Paleozoic?); age xxx |
5565 | Pzg - Metagraywacke and subordinate phyllite (Paleozoic?); age 208-408 my |
5740 | Ps - Sandstone, sandy limestone, and conglomerate (Permian); age 245-286 my |
6080 | TrDc - Chert, argillite, and limestone (Triassic? to Devonian); age 208-374 my |
6522 | Dgnr - Granitic gneiss (Devonian); age 360-408 my |
6523 | Dgna - Granitic gneiss (Devonian); age 360-408 my |
6620 | DSp - Paradise Fork Formation (Early Devonian and Silurian); age 421-438 my |
6960 | DSw - Whirlwind Creek Formation (Devonian and Late Silurian); age 387-421 my |
7261 | Df - Felsic schist (Devonian); age 360-408 my |
7520 | Ont - Novi Mountain and Telsitna Formations, undivided (Ordovician); age 438-505 my |
7581 | Oc - Chert and argillite (Ordovician); age 438-505 my |
8300 | PzZq - Quartzite, grit, argillite, and quartz-mica schist (Early Paleozoic and Proterozoic?); age 505-900 my |
8500 | PzZi - Granitic gneiss (Paleozoic? and Proterozoic); age 360-705 my |
8601 | PzZsr - Pelitic schist, calc, schist, and quartzite (Paleozoic and Proterozoic?); age 286-900 my |
8602 | PzZsa - Pelitic schist, calc schist, and quartzite (Paleozoic and Proterozoic); age 286-900 my |
8605 | PzZua - Pelitic schist, calc schist, and quartzite and carbonate rocks, undivided (Paleozoic and Proterozoic); age 286-900 my |
8610 | Zc - Calc schist, quartz-mica schist, and greenstone (Proterozoic); age 360-900 my |
8625 | PzZsr - Pelitic schist, calc schist, and quartzite (Paleozoic and Proterozoic?); age 360-900 my |
8640 | Zs - Pelitic schist, quartzite, quartzo-feldspathic gneiss, and greenstone (Proterozoic); age 570-1600 my |
8641 | Zs - Pelitic schist, quartzite, quartzo-feldspathic gneiss, and greenstone (Proterozoic); age 570-900 my |
8700 | Zv - Metavolcanic rocks (Late Proterozoic); age 360-900 my |
8801 | MzZkc - Complex of the Kokrines Hills (Mesozoic to Proterozoic?); age 360-900 my |
9325 | PzZsr - Pelitic schist, calc schist, and quartzite (Paleozoic and Proterozoic?); age 144-2500 my |
HFS - contact metamorphism; hornfels Q - queried unit
Value | Definition |
---|---|
AR003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
BM002 | Karl, S.M., Dumoulin, J.A., Ellersieck, Inyo, Harris, A.G., and Schmidt, J.M., 1989, Preliminary geologic map of the Baird Mountains and part of the Selawik quadrangles, Alaska: U.S. Geological Survey Open-File Report 89-551, scale 1:250,000, 65 p. |
BM003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
BT002 | Patton, W.W., Jr., and Miller, T.P., 1973, Bedrock geologic map of the Bettles and southern part of Wiseman quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-492, scale 1:250,000. |
BT003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
CA002 | Patton, W.W., Jr., 1967, Regional geologic map of the Candle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-492, scale 1:250,000. |
CA003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
HU002 | Patton, W.W., Jr., and Miller, T.P., 1966, Regional geologic map of the Hughes quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Series Map I-459, scale 1:250,000. |
HU003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
KT002 | Patton, W.W., Jr., 1966, Regional geology of the Kateel River quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Map I-437, 1 sheet, scale 1:250,000. |
KT003 | Patton, W.W., Jr., unpub. data, 1997 |
KT004 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
MD002 | Patton, W.W., Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811A, 1 sheet, scale 1:250,000. |
MD003 | Bundtzen, T.K., Pinney, D.S., and Laird, G.M., 1997, Preliminary geologic map and data table from the Ophir C-1 and western Medfra C-6 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 97-46, scale 1:63,360, 10 p. |
MD004 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
MZ002 | Patton, W.W., Jr., Miller, T.P., Chapman, R.M., and Yeend, Warren, 1978, Geologic map of the Melozitna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-1071, scale 1:250,000. |
MZ003 | Roeske, S.M., Dusel-Bacon, Cynthia, Aleinikoff, J.N., Snee, L.W., and Lanphere, M.A., 1995, Metamorphic and structural history of continental crust at a Mesozoic collisional margin, the Ruby terrane, central Alaska: Journal of Metamorphic Geology, v. 13, p. 25-40. |
MZ004 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
NL003 | Patton, W.W., and Moll-Stalcup, E.J., 2000, Geologic map of the Nulato quadrangle, west-central Alaska: U.S. Geological Survey Geologic Investigations Series I-2677, 41 p., 1 sheet, scale 1:250,000. |
NL004 | Patton, W.W., Jr., Wilson, F.H., Labay, Keith, Shew, Nora, unpub. data, 2005 |
NR002 | Patton, W.W., Jr., unpub. data, 2005 |
NR003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., Shew, Nora, unpub. data, 2005 |
OP002 | Chapman, R.M., Patton, W.W., Jr., and Moll, E.J., 1985, Reconnaissance geologic map of the Ophir quadrangle, Alaska: U.S. Geological Survey Open-File Report 85-203, 1 sheet, scale 1:250,000. |
OP005 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
RB009 | Patton, W.W., Jr., unpub. data, 2001 |
SE002 | Patton, W.W., Jr., and Miller, T.P., 1968, Regional geologic map of the Selawik and southeastern Baird Mountains quadrangles, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-530, scale 1:250,000. |
SE003 | Karl, S.M., Dumoulin, J.A., Ellersieck, Inyo, Harris, A.G., 1989, Preliminary geologic map of the Baird Mountains and part of the Selawik quadrangles, Alaska: U.S. Geological Survey Open-File Report 89-551, scale 1:250,000, 65 p. |
SE004 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
SH002 | Patton, W.W., Jr., Miller, T.P., and Tailleur, I.L., 1968, Regional geologic map of the Shungnak and southern part of the Ambler River quadrangles, Alaska: U.S. Geological Survey Miscellaneous Geological Investigations Map I-554, scale 1:250,000. |
SH003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
SH004 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
SP003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
TN008 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
UL002 | Patton, W.W., Jr., and Moll-Stalcup, E.J., 1996, Geologic map of the Unalakleet quadrangle, west-central Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2559, scale 1:250,000, 39 p. |
UL003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
WI003 | Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew, Nora, unpub. data, 2005 |
Value | Definition |
---|---|
1 | Stratigraphic or intrusive contact, location certain |
2 | Stratigraphic or intrusive contact, location approximate |
3 | Stratigraphic or intusive contact, loaction inferred, queried |
4 | Normal fault, location certain; if ARC-PARA1 = 1, then upthrown side on on right from origin |
5 | Normal fault, location approximate, if ARC-PARA1 = 1, then upthrown side is on right from origin |
6 | Normal fault, location inferred or queried; if ARC-PARA1 = 1, then upthrown side is on right from origin |
7 | Shoreline or riverbank |
9 | Boundary or altered zone or hornfels |
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, queried; teeth on right from origin |
14 | Caldera or crater rim |
19 | Internal contact having tics on right from origin |
30 | Fault, sense of displacement uncertain; location certain |
31 | Fault, sense of displacement uncertain, location approximate |
32 | Fault, sense of displacement uncertain, location inferred |
51 | Contact, concealed |
52 | Normal fault, concealed; if ARC-PARA1 = 1, then upthrown side is on the right from origin |
53 | Thrust fault, concealed; teeth on right from origin |
56 | Concealed normal fault, having left lateral oblique slip |
57 | Concealed right lateral fault |
58 | Concealed left lateral fault |
72 | Normal fault, location approximate, having right lateral oblique slip |
74 | Normal fault, location approximate, having left lateral oblique slip |
87 | Right lateral fault, location certain |
88 | Right lateral fault, location approximate |
90 | Left lateral fault, location certain |
99 | Bounding line of coverage |
This data set was prepared by Keith Labay (contractor), F.H. Wilson (USGS) and Solmaz Mohadjer (contractor)
U.S. Geological Survey
c/o Frederic H. Wilson
Geologist
4200 University Drive
Anchorage, Alaska 99508-4667
U.S.A.
907-786-7448 (voice)
fwilson@usgs.gov
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 series has been compiled from a wide variety of sources, published and unpublished, ranging from state and regional geologic maps to large-scale field mapping.
Person responsible for change:
U.S. Geological Survey, Alaska Science Center
c/o Frederic H. Wilson
Geologist
4200 University Drive
Anchorage, Alaska 99508
USA
907-786-7445 (voice)
fwilson@usgs.gov
The original source materials for this data set are from various scales (1:63,360 to 1:250,000), medium (digital, mylar, paper), and scope (bedrock, surficial, tectonic). All vector features were originally hand digitized on a large digitizing tablet or on screen. Vector and polygon attributes were assigned based on the original source. The digital data has been visually checked, and the geologic map has been technically reviewed and edited.
This data is presented for use at a nominal scale of 1:500,000, although individual datasets may contain data for use at larger scales. Details within the attribute tables and metadata provide information on map sources and the appropriate scales for use.
The complete data set consists of the GIS files and an associated database of geologic units.
Each geology coverage is a network coverage containing attributed arcs and polygons. Each polygon has coded a attribute designating the mapped geologic unit. Faults, stratigraphic contacts, and other linear features are represented as arcs. When a fault is also a stratigraphic contact, only a single arc is present. Dangling arcs may be present (faults, dike, etc.)
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.
U.S. Geological Survey
MS 902 Box 25286 Denver Federal Center
Lakewood, CO 80225
USA
1-888-ASK-USGS (voice)
Open-File Report 2005-1341
This world-wide web 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.Although all data and software published on this web-site have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
Data format: | ARCE |
---|---|
Network links: |
<http://pubs.usgs.gov/of/2005/1341/> |
U.S. Geological Survey
c/o Nora B. Shew
4200 University Drive
Anchorage, AK 99508
USA
907-786-7445 (voice)
nshew@usgs.gov