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The engineering-geologic map is derived electronically, using Geographic Information System (GIS) software, from the surficial-geologic map of the second segment of the proposed natural gas pipeline corridor through the upper Tanana valley, a 12-mi-wide (19.3-km-wide) area that straddles the Alaska Highway through the upper Tanana River valley from the Robertson River eastward to near Tetlin Junction in the Tanacross Quadrangle (Reger and Hubbard, PIR 2009-6A). Surficial-geologic units were initially identified by interpretation of false-color ~1:65,000-scale infrared aerial photographs taken in July 1978, August 1980, and August 1981 and locally verified by field checking in 2007 and 2008. The map shows the distribution...
Tags: Alaska Highway Corridor,
Alaska Range,
Alaska, State of,
Alluvial Deposits,
Climate Change, All tags...
Colluvial Deposits,
Construction Materials,
Crushed Gravel,
Crushed Rock,
Dot Lake,
Engineering,
Engineering Geology,
Floodplain,
Floods,
Gasline,
Geologic Hazards,
Geologic Map,
Geologic Materials,
Icings,
Land Subsidence,
Landslide,
Liquefaction,
Materials Site,
Permafrost,
Proposed Natural Gas Pipeline,
Robertson River,
Sand & Gravel,
Subsidence,
Surficial Geology,
Tanacross,
Tanacross Quadrangle,
Taylor Highway,
Tok,
Tok River,
Transportation Corridor,
Unconsolidated Deposits,
geoscientificInformation, Fewer tags
This surficial-geologic map shows the distribution of unconsolidated deposits and undifferentiated bedrock in the Faith Creek area in the Circle A-4, A-5, B-4, and B-5 quadrangles. This map was prepared principally by the interpretation of 1:63,360-scale, false-color, infrared aerial photographs taken in 1979 and 1981 and is locally verified by ground observations during field work in 2007.
Tags: Aerial Geology,
Alluvial Deposits,
Alluvial Fan,
Alluvium,
Chatanika River, All tags...
Circle Quadrangle,
Colluvial Deposits,
Colluvium,
Complex Deposits,
Fairbanks Mining District,
Faith Creek,
Fluvial,
Geologic Map,
Geomorphology,
Glacial Deposits,
Glacial Drift,
Glacial Geology,
Landslide,
Landslide Deposit,
Man-Made Deposits,
Mining,
Pingos,
Placer,
Sourdough Camp,
Steese Highway,
Surficial,
Surficial Geologic Map,
Surficial Geology,
Terrace,
Till,
geoscientificInformation, Fewer tags
This report provides detailed mapping (1:63,360-scale) in the Dalton Highway area, from Atigun Gorge to Slope Mountain, in the west-central Philip Smith Mountains quadrangle. The map area extends from the northern flank of the Endicott Mountains into the Arctic Foothills province.
Tags: Alaska, State of,
Allochthon,
Alluvial,
Arenite,
Atigun Gorge, All tags...
Atigun River,
Aufeis,
Barite,
Biostratigraphy,
Brooks Range,
Carbonates,
Chert,
Clastics,
Coal,
Colluvial Deposits,
Conglomerate,
Correlation,
Dalton Highway,
Depositional Environment,
Endicott Mountains,
Eolian,
Fan,
Faulting,
Fluvial,
Folding,
Galbraith Lake,
Geologic Map,
Glacial,
Glacial Lake,
Glaciation,
Grainstone,
Graywacke,
Ice-Contact,
Igneous,
Imnavait Mountain,
Itigaknit Mountain,
Itkillik River,
Kettles,
Kuparuk River,
Lacustrine,
Landslide,
Limestone,
Measured Stratigraphic Section,
Mudstone,
Organic Geochemistry,
Orogeny,
Outwash,
Packstone,
Paleocurrent,
Paleontology,
Petroleum,
Philip Smith Mountains Quadrangle,
Porosity,
Provenance,
Reservoir,
Rock-Glacier,
STATEMAP Program,
Sagavanirktok River,
Sandstone,
Shale,
Siderite,
Slope Mountain,
Solifluction,
Stratigraphy,
Structure,
Surficial,
Tectonics,
Terrace,
Toolik Lake,
Toolik River,
Trans-Alaska Pipeline,
Turbidites,
Uplift,
Wackestone,
geoscientificInformation, Fewer tags
The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-1 Quadrangle.The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This map illustrates the distribution of a variety of unconsolidated deposits and undifferentiated bedrock in the Eagle A-1 Quadrangle, Fortymile mining district. It was prepared by the interpretation of 1:63,360-scale, false-color, infrared aerial photographs taken from July 1978 through August 1981 and is locally verified by ground observations during field visits.The results should be considered reconnaissance in nature. The dominant unconsolidated deposit...
Tags: Alaska, State Of,
Alluvial Deposits,
Bison Fossils,
Boundary,
Caribou Fossils, All tags...
Colluvial Deposits,
Complex Deposits,
Eagle Quadrangle,
Fortymile Mining District,
Fortymile River,
Geology,
Glacial Deposits,
Horse Fossils,
Jack Wade Junction,
Mammoth Fossils,
Man-made Deposits,
Mining,
STATEMAP project,
Sheep Fossils,
Steele Creek Dome,
Tailings,
Taylor Highway,
Terrace,
Top of the World Highway,
Unconsolidated Deposits,
Walker Fork,
geoscientificInformation, Fewer tags
This report provides detailed (1:63,360-scale) surficial-geologic mapping in the Dalton Highway area, from the Sagavanirktok to the Itkillik Rivers, in the west-central Philip Smith Mountains quadrangle. The map area extends from the northern flank of the Endicott Mountains into the Arctic Foothills province.
Tags: Alaska, State of,
Alluvial,
Atigun Gorge,
Atigun River,
Aufeis, All tags...
Avalanche,
Beach Deposits,
Brooks Range,
Colluvial Deposits,
Correlation,
Dalton Highway,
Drainage Patterns,
Dunes,
Endicott Mountains,
Eolian,
Erratics,
Esker,
Fan,
Floodplain,
Fluvial,
Galbraith Lake,
Geologic Map,
Glacial,
Glacial Drift,
Glacial Lake,
Glaciation,
Glaciers,
Gravel,
Ice Contact Deposits,
Imnavait Mountain,
Interglaciation,
Itigaknit Mountain,
Itkillik River,
Kettles,
Kuparuk River,
Lacustrine,
Landslide,
Levees,
Loess,
Moraines,
Outwash,
Paleosols,
Peat,
Permafrost,
Philip Smith Mountains Quadrangle,
Piracy,
Radiocarbon Dating,
Reference Information,
Rock Glaciers,
STATEMAP Project,
Sagavanirktok River,
Sand,
Silt,
Slope Mountain,
Solifluction,
Stratigraphy,
Surficial,
Talus,
Tectonics,
Terrace,
Toolik Lake,
Toolik River,
Trans-Alaska Pipeline,
Tundra,
Vegetation,
geoscientificInformation, Fewer tags
This map illustrates potential near-surface sources of geologic materials that may be useful for construction and other purposes. Field observations indicate that each geologic unit (for example, flood-plain alluvium) has a definite composition or range of composition. Therefore, the presence of material type is interpreted from the distribution of geologic units (Newberry and others, 1996 - PDF96-16). Assignment of Unified Soil Classes (Wagner, 1957) is based on visual observation and interpretation of the likely distribution of the materials; no grain-size analyses were performed. Descriptions of unconsolidated deposits are modified from Pewe and Bel (1975a-d) and Pewe and Bell (1976). This map is generalized...
Tags: Alaska, State of,
Alluvial Deposits,
Colluvial Deposits,
Eolian,
Fairbanks, All tags...
Fairbanks Creek,
Fairbanks Mining District,
Geology,
Mining,
STATEMAP Project,
geoscientificInformation, Fewer tags
This map is a compilation of previously unpublished and published data, as well as from updated field mapping. This publication offers a 1:125,000-scale map sheet accompanied by a booklet containing a summary of the geology, a colored terrane map, map unit descriptions, a summary table listing selected mineral deposits and energy resources, references, and a correlation of map units. The text (in the report) describes the geology and resource potential of a highly mineralized region centered in the Farewell silver-lead-zinc district southeast of McGrath. Potentially important coal resources flanking the Alaska Range are also described in the map area.
Tags: Alaska, State of,
Alluvial Deposits,
Colluvial Deposits,
Eolian,
Geologic Hazards, All tags...
Geologic Materials,
Geology,
Glacial Deposits,
McGrath,
geoscientificInformation, Fewer tags
This report provides detailed (1:63,360-scale) mapping of portions of U.S. Geological Survey Circle B-2 (1955), B-3 (1955), B-4 (1952), C-2 (1955), C-3 (1955), and C-4 (1952) quadrangles. The area is part of the Circle mining district and adjacent to the Fairbanks mining district. This report includes detailed geologic, structural, stratigraphic, and geochronologic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the project has also generated derivative maps of geologic construction materials and geologic hazards.
Tags: Aereal,
Aerial Photography,
Aeromagnetic Survey,
Age Dates,
Alaska, State of, All tags...
Alluvial Deposits,
Alluvium,
Amphibolite,
Ar-Ar,
Bedrock,
Bibliography,
Birch Creek,
C14,
Carbonates,
Circle Hot Springs,
Circle Mining District,
Circle Quadrangle,
Clastics,
Coal,
Colluvial Deposits,
Colluvium,
Conductivity Survey,
Conodonts,
Crooked Creek,
Electromagnetic Survey,
Fan,
Faulting,
Faults,
Fluvial,
Folding,
Fossils,
Geologic,
Geomorphology,
Glacial,
Glacial Deposits,
Glacial Drift,
Granite,
Hornblende,
Hornfels,
Igneous Rocks,
K-Ar,
Magnetite,
Major Oxides,
Mammoth Creek,
Mastodon Dome,
Metamorphic Grade,
Metamorphic Minerals,
Metamorphism,
Mineralogy,
Modal Analysis,
Petrography,
Plutonic,
Plutonic Hosted,
Porphyry,
Precious Metals,
Quartz,
Regional,
Regional Metamorphism,
Sample Location,
Sandstone,
Schist,
Sedimentary,
Structure,
Surficial,
Tectonics,
Terranes,
geoscientificInformation, Fewer tags
The Alaska Division of Geological & Geophysical Surveys (DGGS), in partnership with the U.S. National Cooperative Geologic Mapping Program, mapped approximately 450 mi2 of the Talkeetna Mountains region of central Alaska at 1:50,000 scale over the course of six weeks in 2014. This area contains significant exposures of Late Triassic mafic volcanics and gabbro sills that have been the focus of region-wide exploration for the Strategic and Critical platinum-group elements (PGEs). The area also exposes numerous inactive and possibly active faults which project through the area of proposed hydropower development. The resulting geologic map offers an improved understanding of the geology, structural history, and mineral...
Tags: 40Ar/39Ar,
Aerial Geology,
Aerial Photography,
Alluvial,
Alluvial Deposits, All tags...
Amphibolite Facies Units,
Bedrock Geologic Map,
Bedrock Geology,
Brachiopods,
Cleary Creek,
Colluvial Deposits,
Cordilleran Ice Sheet,
Crinoids,
Esker,
Faulting,
Faults,
Floodplain,
Fluvial,
Fossils,
Geochronology,
Geologic Map,
Geologic Materials,
Geomorphology,
Glacial,
Glacial Deposits,
Glacial Drift,
Glacial Geology,
Glacial Geomorphology,
Glacial History,
Glacial Lake,
Glacial Processes,
Glacial Stratigraphy,
Glaciation,
Ice Contact Deposits,
Ice-Contact,
Iron Creek,
Lacustrine,
Lacustrine Sedimentation,
Landslide,
Landslide Deposit,
Outwash,
Outwash Fan,
Paleochannel,
Permafrost and Periglacial,
Remote Sensing,
Rock Glaciers,
Rock-Glacier Deposits,
Rockfall,
STATEMAP Project,
Sand and Gravel,
Slides,
Slope Instability,
Soil Creep,
Stephan Lake,
Surficial,
Surficial Geologic Map,
Surficial Geology,
Talkeetna Mountains,
Talkeetna Mountains Quadrangle,
Talkeetna River,
Till,
geoscientificInformation, Fewer tags
This preliminary geologic map of the Fairbanks mining district was mapped at 1:63,360 scale. The report describes the geologic setting, structural geology, earthquake potential, economic geology and the description of bedrock units.
Tags: Alaska, State of,
Alluvial Deposits,
Colluvial Deposits,
Eolian,
Fairbanks, All tags...
Fairbanks Creek,
Fairbanks Mining District,
Geology,
Mining,
STATEMAP Project,
geoscientificInformation, Fewer tags
This map shows the distribution of unconsolidated deposits and undifferentiated bedrock exposed at the surface in the Sagavanirktok A-3, A-4, B-3, B-4, and portions of the Sagavanirktok A-5 and B-5 quadrangles. Units were mapped by interpretation of stereo pairs of approximately 1:65,000-scale false-color infrared aerial photographs taken in June and August 1978, as well as 2.5 m and 10 m resolution SPOT imagery collected in 2009 and 2010. Fieldwork was completed in 2008.
Tags: Aeolian,
Alaska Pipeline,
Alaska, State of,
Colluvial Deposits,
Colluvium, All tags...
Dalton Highway,
Geologic Map,
Geology,
Geomorphology,
Glacial,
Glacial Drift,
Glacial Geology,
Glacial Geomorphology,
Glacial Processes,
Ivishak River,
Lupine River,
Permafrost,
Permafrost and Periglacial,
Pingos,
Sagavanirktok,
Sagavanirktok Quadrangle,
Sagavanirktok River,
Solifluction,
Surficial Geology,
Thaw Lakes,
Thermokarst,
Toolik River,
geoscientificInformation, Fewer tags
This bedrock geologic map was produced by using airborne magnetic and electromagnetic surveys, data and notes from several months of fieldwork, geochemical data, and laboratory investigations. These maps are the result of new field investigations in the Eagle A-1 Quadrangle by DGGS in 1999, 2000, and 2001. Field investigations are part of a three-year mapping program to provide geologic ground truth for airborne geophysical surveys flown by DGGS in the Fortymile mining district during 1998.
Tags: Alaska, State of,
Alluvial Deposits,
Colluvial Deposits,
Eagle Quadrangle,
Fortymile Mining District, All tags...
Fortymile River,
Geology,
Glacial Deposits,
Igneous Rocks,
Jack Wade Junction,
Man-Made Deposits,
Metamorphic Rocks,
Mining,
STATEMAP Project,
Steele Creek Dome,
Taylor Highway,
Top of the World Highway,
Unconsolidated Deposits,
geoscientificInformation, Fewer tags
This geologic map was produced by merging a bedrock geologic map and a surficial geologic map of the Eagle A-1 Quadrangle. Surficial geologic units were determined by a combination of air photo interpretation and site-specific field investigations. Bedrock geologic units were determined by using a combination of airborne magnetic and electromagnetic surveys, several months of fieldwork, geochemical data, and laboratory investigations. These maps are the result of new field investigations by DGGS in 1999 and 2001.
Tags: Alaska, State of,
Alluvial Deposits,
Colluvial Deposits,
Eagle Quadrangle,
Fortymile Mining District, All tags...
Fortymile River,
Geology,
Glacial Deposits,
Igneous Rocks,
Jack Wade Junction,
Man-Made Deposits,
Metamorphic Rocks,
Mining,
STATEMAP Project,
Steele Creek Dome,
Taylor Highway,
Top of the World Highway,
Unconsolidated Deposits,
geoscientificInformation, Fewer tags
This map shows the distribution of surficial deposits and undifferentiated bedrock in parts of the Livengood C-3 and C-4 quadrangles, Tolovana mining district.
Tags: Aeolian,
Aerial Geology,
Age Dates,
Alluvial Deposits,
Alluvium, All tags...
C14,
Colluvial Deposits,
Colluvium,
Debris Flow,
Debris Flow Deposit,
Elliot Highway,
Eolian,
Floodplain,
Geomorphology,
Goldstream Creek,
Landslide,
Livengood,
Livengood Bench,
Livengood Creek,
Livengood Dome,
Livengood Mining District,
Livengood Quadrangle,
Money Knob,
Permafrost,
Permafrost and Periglacial,
Pingos,
Placer,
Placer Gold,
STATEMAP Project,
Slides,
Slope Instability,
Solifluction,
Surficial,
Surficial Geologic Map,
Surficial Geology,
Tailings,
Thawing Permafrost,
Thermokarst,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
This report presents the findings of a geologic and geotechnical evaluation of a landslide at the Yukon River bridge (the E.L. Patton Bridge). The Yukon River bridge landslide occurred in fall 2012 between approximately 375 and 575 feet west of the bridge. Although there was no damage to the bridge foundation, the landslide's close proximity to the bridge and concerns over additional failures prompted multiple evaluations, including landslide documentation, drainage assessments, and geotechnical studies. This report was prepared to convey the general characteristics of the rock mass, characteristics of rock discontinuities, and the geomorphic expression of the 2012 landslide in the vicinity of the bridge. We determined...
Tags: Alluvial Fan,
Alluvium,
Coastal and River Hazards,
Colluvial Deposits,
Colluvium, All tags...
Dalton Highway,
Drainage Patterns,
Earthquake Related Hazards,
Engineering,
Erosion,
Fracturing,
Geological Process,
Geology,
Geomorphology,
Geotechnical,
Hazards,
Landslide,
Livengood Quadrangle,
Loess,
Permafrost and Periglacial,
Slope Instability Hazards,
Surficial,
Trans-Alaska Pipeline,
Translational Landslide,
Transportation Corridor,
Yukon River,
geoscientificInformation, Fewer tags
The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-1 Quadrangle. The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This map illustrates potential near-surface sources of various geologic materials that may be useful for construction. Field observations indicate that each geologic unit (for example, stream alluvium) has a definite composition or range of composition. Therefore, the probable presence of materials is interpreted from the distribution of geologic units on the geologic map of this quadrangle. This map is generalized and is not intended to show exact locations...
Tags: Alluvial Deposits,
Alluvium,
Boundary (Place),
Colluvial Deposits,
Colluvium, All tags...
Construction Materials,
Crushed Gravel,
Crushed Rock,
Decorative Stone,
Drain Rock,
Engineering,
Engineering Geology,
Fortymile Mining District,
Geologic Hazards,
Geologic Map,
Geologic Materials,
Ground Ice,
Jack Wade Junction,
Permafrost,
Photogeologic Lineaments,
Pingos,
Rip Rap,
STATEMAP Project,
Sand and Gravel,
Steele Creek Dome,
Taylor Highway,
Thawing Permafrost,
Top of the World Highway,
Unconsolidated Deposits,
Walker Fork,
geoscientificInformation, Fewer tags
During 2006 and 2007 the Alaska Division of Geological & Geophysical Surveys conducted reconnaissance surficial-geologic mapping in segment 1 of the Alaska Highway corridor, which straddles the Alaska Highway through the Tanana River valley from Delta Junction to the eastern boundary of the Mt. Hayes Quadrangle. Surficial-geologic deposits were initially mapped by interpreting ~1:63,360-scale, false-color infrared aerial photographs taken in August 1980 and field verified in 2006-2007.
Tags: Age Dates,
Alaska Highway Corridor,
Alluvial Deposits,
Alluvial Fan,
Alluvium, All tags...
Big Delta,
Big Delta Quadrangle,
C14,
Colluvial Deposits,
Colluvium,
Delta Junction,
Delta River,
Depositional Environment,
Dot Lake,
Dunes,
Eolian,
Erosion,
Erratics,
Esker,
Faults,
Floodplain,
Floods,
Gasline,
Geologic Hazards,
Geologic Map,
Geologic Materials,
Geomorphology,
Glacial Deposits,
Glacial Drift,
Glacial Geology,
Glacial Hazards,
Glacial Lake,
Glacial Processes,
Gravel,
Ice Contact Deposits,
Jokulhlaups,
Lake George,
Lake Level,
Landslide,
Measured Sections,
Mount Hayes Quadrangle,
Outburst Floods,
Outwash,
Paleoenvironment,
Paleosols,
Paludal,
Peat,
Permafrost,
Proposed Natural Gas Pipeline,
Radiocarbon Dating,
Rock Glaciers,
Sand,
Soil,
Soils,
Surficial,
Surficial Geology,
Talus,
Tanana River,
Terrace,
Thaw Lakes,
Transportation Corridor,
Unconsolidated Deposits,
Water Table, Fewer tags
The engineering-geologic map, on two sheets, is derived electronically from the surficial-geologic map of the initial segment of the proposed natural gas pipeline corridor through the upper Tanana valley (Reger and others, PIR 2008-3a) using Geographic Information System (GIS) software. Surficial-geologic units were initially identified by interpretation of false-color ~1:63,000-scale infrared aerial photographs taken in July 1978, August 1980, and August 1981 and locally verified by field checking in 2006 and 2007. The map shows the distribution of surficial-geologic and bedrock units grouped genetically with common properties that are typically significant for engineering applications.
Tags: Alaska Highway Corridor,
Alluvial Deposits,
Avalanche,
Big Delta,
Big Delta Quadrangle, All tags...
Colluvial Deposits,
Construction Materials,
Crushed Gravel,
Crushed Rock,
Delta Junction,
Delta River,
Dot Lake,
Engineering Geology,
Erosion,
Floodplain,
Floods,
Gasline,
Geologic Hazards,
Geologic Map,
Geologic Materials,
Glacial Deposits,
Icings,
Lake George,
Land Subsidence,
Landslide,
Liquefaction,
Materials Site,
Mount Hayes Quadrangle,
Permafrost,
Proposed Natural Gas Pipeline,
Sand & Gravel,
Subsidence,
Surficial Geology,
Tanana River,
Unconsolidated Deposits, Fewer tags
This map illustrates the potential near-surface sources of various geologic materials that may be useful for construction. Field observations indicate that each geologic unit has a definite composition or range of composition wherever that unit is found. Therefore, the presence of materials is interpreted from the distribution of geologic units on the geologic map of this quadrangle. This map is generalized and is not intended to show exact locations of specific materials. The map also addresses some of the principle geologic hazards that may be associated with the deposits based upon their general physical properties and conditions that are characteristic of their depositional environment.
Tags: Alaska, State of,
Alluvial Deposits,
Colluvial Deposits,
Eolian,
Geologic Hazards, All tags...
Geologic Materials,
Geology,
Glacial Deposits,
McGrath,
geoscientificInformation, Fewer tags
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