This data set is a portion of a statewide geology database, which is being compiled by the U.S. Geological Survey's National Survey and Analysis (NSA) project, whose goal is to compile geologic, geochemical, geophysical, and other data.
Wilson, Frederic H., Labay, Keith A., Shew, Nora, and Hults, Chad K., 2006, Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map of the lower Yukon River region, Alaska: U.S. Geological Survey Open-File Report OFR 2006-????.This is part of the following larger work.Online Links:
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
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.9787.
| Value | Definition |
|---|---|
| 100 | Qac - Alluvial, colluvial, and glacial drift deposits, undivided (Quaternary) |
| 102 | water |
| 105 | Qf - Floodplain, tidal flats, and estuarine deposits (Quaternary) |
| 115 | Qbl - Beach and lagoonal deposits (Quaternary) |
| 120 | Qw - Wind-blown deposits (Quaternary) |
| 330 | Qb - Young scoriaceous tholeiitic basalt lava flows and cones (Quaternary) |
| 350 | QTb - Basalt lava flows (Quaternary and latest Tertiary) |
| 1004 | Tb - Basalt lava flows (late Tertiary) |
| 1600 | TKad - Dacite, rhyolite, andesite, and basalt lava flows, and volcaniclastic and hypabyssal rocks, undivided (Tertiary and latest Cretaceous) |
| 1602 | TKi - Shallow intrusive rocks of intermediate and silicic composition (early Tertiary and latest Cretaceous) |
| 1625 | TKd - Dacititc and rhyolitic flows, domes, ash-flows tuffs, and hyabyssal rocks (early Tertiary and latest Cretaceous) |
| 1631 | TJb - Whitefish Lake Volcanic Field (early Tertiary? to Jurassic?) |
| 1635 | TKa - Andesite and basalt flows and volcaniclastic rocks (early Tertiary and latest Cretaceous) |
| 1655 | TKg - Granite, granodiorite, syenite, and monzonite (early Tertiary and latest Cretaceous) |
| 1682 | TJm - Altered mafic plutonic rocks (early Tertiary? to Jurassic?) |
| 1943 | Kym - Polymict conglomerate, sandstone, siltstone, and shale (Cretaceous) |
| 1985 | Kks - Sandstone, siltstone, and shale (Cretaceous) |
| 2021 | Kys - Sandstone and siltstone (Cretaceous) |
| 2023 | Kys - Sandstone and siltstone (Cretaceous) |
| 2102 | Kygc - Highly calcareous graywacke sandstone and mudstone turbidites (Cretaceous) |
| 2105 | Kygv - Graywacke sandstone and mudstone turbidites containing abundant laumonitized volcanic debris (Cretaceous) |
| 2180 | Kyg - Graywacke sandstone and mudstone turbidites, undivided (Cretaceous) |
| 2330 | KJv - Andesitic and basaltic volcaniclastic rocks and lava flows, chert, and mudstone (Early Cretaceous and Jurassic) |
| 2480 | Kg - Granodiorite and granite (Late and Early Cretaceous) |
| 2870 | KJb - Basalt and andesite lava flows (Early Cretaceous and (or) Late Jurassic) |
| 2885 | TJi - Hyabyssal felsic intrusive rocks (early Tertiary? to Jurassic?) |
| 3120 | Jvc - Volcaniclastic conglomerate, sandstone, and shale (Late
and Middle Jurassic)
|
| 3380 | Jt - Trondhjemite, tonalite, and gabbro (Jurassic) |
| 3450 | Jab - Andesitic and basaltic lava flows and marine volcaniclastic rocks (Middle Jurassic) |
| 3498 | MzPzum - Serpentinized ultramafic rocks (Mesozoic and Paleozoic?) |
| 5235 | KMu - Andesitic and basaltic volcaniclastic rocks, lava flows, chert, and mudstone (KJv) and altered basalt, chert, chert breccia, argillite, tuff, volcaniclastic graywacke, and limestone (TrMv), undivided (Cretaceous to Mississippian) |
| 5280 | TrMv - Complexly deformed assemblage of altered basalt, chert, chert breccia, argillite, tuff, volcaniclastic graywacke, and limestone (Triassic to Mississippian) |
| 6320 | ls - limestone |
HFS - contact metamorphism, hornfels Q - queried unit
| Value | Definition |
|---|---|
| BL002 | Hoare, J.M., and Condon, W.H., 1966, Geologic map of the Kwiguk and Black quadrangles, western Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Series Map I-469, scale 1:250,000. |
| BL003 | Patton, W.W., Jr., Wilson, F.H., and Labay, K.A., in prep., Reconnaissance geologic map of the lower Yukon River region, Alaska: U.S. Geological Survey Scientific Investigations Series Map SIM-xxxx, scale 1:500,000. |
| HC003 | Patton, W.W., Jr., Wilson, F.H.., and Labay, K.A., in prep., Reconnaissance geologic map of the lower Yukon River region, Alaska: U.S. Geological Survey Scientific Investiations Series Map SIM-xxxx, scale 1:500,000. |
| HP002 | Hoare, J.M., and Condon, W.H., 1968, Geologic map of the Hooper Bay quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Series Map I-523, scale 1:250,000. |
| HP003 | Patton, W.W., Jr., Wilson, F.H., and Labay, K.A., in prep., Reconnaissance geologic map of the lower Yukon River region, Alaska: U.S. Geological Survey Scientific Investigations Series Map SIM-xxxx, scale 1:500,000. |
| KW003 | Patton, W.W., Jr., Wilson, F.H., and Labay, K.A., in prep., Reconnaissance geologic map of the lower Yukon River region, Alaska: U.S. Geological Survey Scientific Investigations Series Map SIM-xxxx, scale 1:500,000. |
| MA003 | Patton, W.W., Jr., Wilson, F.H., and Labay, K.A., in prep., Reconnaissance geologic map of the lower Yukon River region, Alaska: U.S. Geological Survey Scientific Investigations Series Map SIM-xxxx, scale 1:500,000. |
| RM005 | Patton, W.W., Jr., Wilson, F.H., and Labay, K.A., in prep., Reconnaissance geologic map of the lower Yukon River region, Alaska: U.S. Geological Survey Scientific Investigations Series Map SIM-xxxx, scale 1:500,000. |
| SC002 | Hoare, J.M., and Condon, W.H., 1971, Geologic map of the St. Michael quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Series Map I-682, scale 1:250,000. |
| SC003 | Patton, W.W., Jr., Wilson, F.H., and Labay, K.A., in prep., Reconnaissance geologic map of the lower Yukon River region, Alaska: U.S. Geological Survey Scientific Investigations Series Map SIM-xxxx, scale 1:500,000. |
| Value | Definition |
|---|---|
| 1 | Stratigraphic or intrusive contact, location certain |
| 2 | Stratigraphic or intrusive contact, location approximate |
| 4 | Normal fault, location certain; if ARC-PARA1 = 1, then upthrown side on the 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, queried; if ARC-PARA1 = 1, then upthrown side is on right from origin |
| 7 | Shoreline or riverbank |
| 9 | Boundary of altered zone or hornfels; no symbol drawn |
| 21 | Syncline, location certain, digitized in direction of plunge; ARC-PARA1 equals angle of plunge, 0 is no plunge, 1 is plunge of unknown dip |
| 22 | Syncline, location inferred, queried, digitized in direction of plunge; ARC-PARA1 equals angle of plunge, 0 is no plunge, 1 is plunge of unknown dip. |
| 24 | Anticline, location certain, digitized in direction of plunge; ARC-PARA1 equals angle of plunge, 0 is no plunge, 1 is plunge of unknown dip. |
| 30 | Fault, sense of displacement uncertain, location certain |
| 31 | Fault, sense of displacement uncertain, location approximate |
| 52 | Concealed normal fault |
| 57 | Concealed right lateral fault |
| 71 | Normal fault, location certain, having right lateral oblique slip |
| 88 | Right lateral fault, location approximate |
| 91 | Left lateral fault, location approximate |
| 99 | Bounding line of coverage |
Frederic H. Wilson (USGS), Keith A. Labay (contractor), Solmaz Mohjader (contractor), Nora Shew (USGS), Kelly Brunt (contractor), Dave Pray (contractor), Shaun Peterson (contractor), Chad K. Hults (USGS)
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
c/o Frederic H. Wilson
Geologist
4200 University Drive
Anchorage, Alaska 99504-4667
U.S.A.
907-786-7448 (voice)
fwilson@usgs.gov
Several types of source materials, of varying scale, were used to created this data set. Sources include previously published maps, unpublished mapping, air photo interpretation, and limited new field mapping. Vector features were mostly digitized on a large digitizing tablet. Vector and polygon attributes were assigned based on the original source. The digital data has been 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 some sources were at larger scale.
The complete data set consists of 11 different GIS coverages, 7 geology coverages and 4 fold coverages. Theres is also an associated relational database of geologic units. Each coverage has the extent of 1:250,000 scale quadrangle. A graphic representation of the GIS database and a report with complete geologic unit descriptions is provided in .pdf format.
Each geology coverage is a network coverage containing attributed arcs and polygons. Each polygon has coded 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
U.S.A.
1-888-ASK-USGS (voice)
Open-File Report 2006-1292
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 of 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: | ARCE |
|---|---|
| Network links: |
http//pubs.usgs.gov/of/2006/1292/ |
U.S. Geological Survey
c/o Nora Shew
4200 University Drive
Anchorage, Alaska 99508-4667
U.S.A.
907-786-7445 (voice)
nshew@usgs.gov