ec1442fe-5da7-4d92-b01f-63b26b281b61_source eng; USA utf8 dataset Simone Montayne Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact 2025-10-02 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) The central Kuskokwim region, Alaska 1955-01-01 publication U.S. Geological Survey United States publisher Cady, W.M. originator Wallace, R.E. originator Hoare, J.M. originator Webber, E.J. originator https://dggs.alaska.gov/pubs/id/3818 GEODATABASE Professional Paper P 268 132 p., 5 sheets The central Kuskokwim region, Alaska, Professional Paper 268, synthesizes the geology, ecology, and mineral resources of Alaska's central Kuskokwim region. Located within a tectonically active mobile belt, the area features over 60,000 feet of sedimentary and volcanic rock, shaped by repeated mountain-building, faulting, and intrusive events from the Precambrian through the Cenozoic. Key igneous rocks include andesite, basalt, rhyolite, quartz monzonite, and diabase, with associated metamorphic zones. Mineral deposits-especially quicksilver, gold, and tungsten-are concentrated in rolling terrain near intrusive contacts. Geomorphic surfaces and active faults reflect ongoing uplift and erosion. The region's rich geologic history and resource potential make it a significant area for exploration. This data release is a conversion of the originating geospatial data published by the USGS and may include minor modifications necessary for schema compliance. The dataset contains geologic, structural, stratigraphic, and geochronologic data organized according to the GeMS and AK GeMS mapping schemas. The complete report, geodatabase, and ESRI fonts and style files are available from the Alaska Division of Geological & Geophysical Surveys website: http://doi.org/10.14509/3818. This product supports the integration of adjacent mapping efforts by USGS and DGGS staff, enabling multi-map merging across the central Kuskokwim region of southwestern Alaska. It delivers geologic insights that advance resource development by identifying key deposits of quicksilver, gold, and tungsten, and correlating them with specific formations, intrusive bodies, and favorable terrains. By outlining the region's complex tectonic framework and mineralization trends, the report offers a strategic foundation for locating untapped reserves and promoting responsible extraction in one of Alaska's most mineral-rich yet underexplored areas. Kinney Engineering, LLC staff used scanned and georeferenced paper maps to digitize geologic features into an AK GeMS database. Chris Wyatt conducted quality control of this digitizing work and completed the creation of the AK GeMS database. Ally M. Steinleitner implemented final database quality control and packaging. This geologic map (or report or conversion or product, etc.) was funded by the USGS National Cooperative Geologic Mapping Program under STATEMAP award number G23AC00584, 2023, and the State of Alaska General Fund. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government. completed Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. pointOfContact asNeeded Alluvial Basalt Bedrock Bedrock Geology Breccia Conglomerate Diabase Felsic Flood GeMS DB L3 Compliant GeMS DB v2 Generalized Geologic Geologic Map Geological Process Geology Geomorphology Glacial Granite Granodiorite Gravel Graywacke Hornfels Igneous Intrusive Limestone Metamorphic Mineral Assessment Mineral Deposit Mineral Development Mineral Exploration Mineral Localities Mineral Resources Minerals Monzonite Outwash Peat Pegmatite Quartz Rhyolite Rocks Sand Sediment Sedimentary Shale Silt Siltstone Surficial Tephra Till Tuff Volcanic theme Alaska Division of Geological & Geophysical Surveys Aniak Aniak Lake Aniak Mining District Aniak River Bristol Bay Region Mining District Chichitnok River Chuathbaluk Chuilnuk Mountains Chuilnuk River Cinnabar Creek Crooked Creek Discovery Creek Donlin Creek Flat Creek Gemuk River Georgetown Hoholitna River Holitna River Holokuk Mountain Holokuk River Iditarod Mining District Iditarod River Itulilik Creek Kalskag Kiokluk Creek Kiokluk Mountains Kipchuk River Kogrukluk River Kolmakof Lake Kolmakof River Kuskokwim River McGrath Mining District Napaimiut Nishlik Lake Nogamut Nushagak River Oksotalik Creek Oskawalik River Red Devil Red Devil Creek Shotgun Creek Sleetmute Stony River Swift River Taylor Mountains Tevyaraq Lake Titnum Creek Tuluka Ukhvigchagvag place Alaska Division of Geological & Geophysical Surveys Gemuk Group Getmuna Rhyolite Group Holitna Group Holokuk Basalt Kuskokwim Group Waterboot Basalt stratum Alaska Division of Geological & Geophysical Surveys Carboniferous Cretaceous Devonian Eocene Miocene Ordovician Pleistocene Pliocene temporal Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. otherRestrictions Use Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. otherRestrictions Access Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Material studies along Kuskokwim River, McGrath to Kalskag, southwest Alaska 1989-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Bundtzen, T.K. originator Laird, G.M. originator Gilbert, W.G. originator https://doi.org/10.14509/1419 Public Data File PDF 89-16 84 p crossReference Coal, peat, and geothermal potential of the Kuskokwim area plan 1986-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Bundtzen, T.K. originator Kline, J.T. originator https://doi.org/10.14509/1289 Public Data File PDF 86-88 16 p crossReference Hydrologic reconnaissance of the Kuskokwim River basin between Sleetmute and Aniak, Alaska 1982-1983 1986-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Collazzi, E.J. originator Ireland, R.R.W. originator https://doi.org/10.14509/2415 Report of Investigation RI 86-16 1 sheet, scale 1:385,000 crossReference Resource evaluation, southcentral Kuskokwim Mountains, Alaska 1985-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Laird, G.M. originator Bundtzen, T.K. originator https://doi.org/10.14509/1118 Public Data File PDF 85-25 2 p crossReference Photointerpretive map of morphological flood-plain deposits and materials resources, middle Kuskokwim River from Sleetmute to Kalskag 1984-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Krause, K.J. originator https://doi.org/10.14509/2361 Report of Investigation RI 84-2 4 p., 5 sheets, scale 1:63,360 crossReference Madhatters of the Kuskokwim Quicksilver Mines 1982-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Bundtzen, T.K. originator Conwell, C.N. originator https://doi.org/10.14509/698 Miscellaneous Publication MP 13 5 p crossReference Cinnabar province, Kuskokwim Region 1962-01-01 publication Alaska Division of Mines and Minerals Fairbanks Alaska, United States publisher Jasper, M.W. originator https://doi.org/10.14509/663 Mineral Investigation MI 194-1 26 p crossReference Parks cinnabar prospect (Willis & Lyman, owners), Sleetmute district, Aniak precinct, Kuskokwim region, Alaska (Sleetmute quadrangle) 1956-01-01 publication Alaska Territorial Department of Mines Fairbanks Alaska, United States publisher Jasper, M.W. originator https://doi.org/10.14509/2025 Prospect Evaluation PE 82-5 9 p., 1 sheet, scale 1 inch = 100 feet crossReference Willis cinnabar property, Sleetmute district, Aniak precinct, Kuskokwim region, Alaska 1955-01-01 publication Alaska Territorial Department of Mines Fairbanks Alaska, United States publisher Jasper, M.W. originator https://doi.org/10.14509/2023 Prospect Evaluation PE 82-3 19 p., 2 sheets crossReference Kolmakof cinnabar prospect, Western Alaska Mining Company, Aniak precinct, Kuskokwim region, Alaska 1955-01-01 publication Alaska Territorial Department of Mines Fairbanks Alaska, United States publisher Jasper, M.W. originator https://doi.org/10.14509/2024 Prospect Evaluation PE 82-4 10 p., 3 sheets crossReference vector eng; USA geoscientificInformation -159.892101 -156.547118 60.439800 62.308343 1945-01-01 1952-01-01 This geodatabase is organized according to the AK GeMS mapping schema Hendricks, M.D., Macpherson, A.E., Athey, J.E., Wyatt, W.C., Montayne, Simone, Buchanan, Wes, Rivera, P.G., and Steinleitner, A.M., 2024, AK GeMS data dictionary: A description of the Alaska geologic mapping schema: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 170 v. 2, 13 p. https://doi.org/10.14509/31172. The distribution package includes ESRI fonts and style files, along with usage instructions. Further documentation of the symbology is provided by Ekberg, P.G., Hendricks, M.D., and Athey, J.E., 2021, AK GeMS symbology: A description of the AK GeMS style file: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 169, 7 p. https://doi.org/10.14509/30584 true geodatabase unknown Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. distributor Contact DGGS for current pricing Free download https://dggs.alaska.gov/pubs/id/3818 geodatabase geologic map information dataset Horizontal Positional Accuracy Report Certainty in feature boundaries or location varies throughout the map. Data fields within each feature class and the accompanying orientation and location confidence lookup tables record the authors' degree of confidence in the location of applicable features. This publication is a USGS Professional Paper(P). This is the Premier series of the USGS. It consists of comprehensive reports of wide and lasting interest and scientific importance, characterized by thoroughness of study and breadth of scientific or geographic coverage. This publication is a USGS Professional Paper(P). This is the Premier series of the USGS. It consists of comprehensive reports of wide and lasting interest and scientific importance, characterized by thoroughness of study and breadth of scientific or geographic coverage. All polygon features were topologically validated according to the AK GeMS geologic mapping schema specifications. This lineage was generated by the FGDC CSDGM to 19139 transformation Geologic mapping - Geologic mapping in the Central Kuskokwim Region was conducted in the late 1940s and early 1950s using a combination of field reconnaissance, aerial photograph interpretation, and stratigraphic correlation. Field teams documented lithologic units, structural features, and mineral occurrences across traverses. Topographic base maps and photogrammetric techniques were used to delineate faults, folds, and intrusive contacts. Rock samples were collected for petrographic and geochemical analysis to support unit classification. 1955-01-01T00:00:00 GIS analysis and digital cartography - This data distribution package's geologic and geographic features were organized and attributed according to the AK GeMS geologic mapping schema. The legacy data were programmatically transformed to provide download options in three formats: (1) an AK GeMS data package that includes the complete AK GeMS database and associated files, (2) a GeMS data package that is a conversion of the AK GeMS database into the base GeMS standard published by the USGS, and (3) a shapefile data package that includes two simple shapefile representations of the data. 2025-01-01T00:00:00 Source Contribution: GIS analysis and digital cartographySource Type: paper AK GeMS symbology: A description of the AK GeMS style file 2021-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Ekberg, P.G. originator Hendricks, M.D. originator Athey, J.E. originator https://doi.org/10.14509/30584 Miscellaneous Publication MP 169 7 p 2021-01-01 Source Contribution: GIS analysis and digital cartographySource Type: paper AK GeMS data dictionary: A description of the Alaska geologic mapping schema 2021-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Hendricks, M.D. originator Ekberg, P.G. originator Athey, J.E. originator Wyatt, W.C. originator Willingham, A.L. originator Naibert, T.J. originator https://doi.org/10.14509/30669 Miscellaneous Publication MP 170 10 p 2021-01-01 Source Contribution: GIS analysis and digital cartographySource Type: paper GeMS (Geologic Map Schema) - A standard format for the digital publication of geologic maps 2020-01-01 publication U.S. Geological Survey United States publisher U.S. Geological Survey National Cooperative Geologic Mapping Program originator https://dggs.alaska.gov/pubs/id/30585 Techniques and Methods TM 11-B10 1 p 2020-01-01 otherRestrictions Metadata Use Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. unknown This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2019-08-12T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. Simone Montayne Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact