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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
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
The Tyonek area in the northwestern Cook Inlet trough is rich in petroleum, coal, geothermal, aggregate, and timber resources, but the detailed geologic mapping necessary for planning future resource development exists only in part of the area. This report and geologic map provide basic surficial-geologic information useful for exploiting those resources and planning future utility corridor developments. In addition to mapping of surficial geologic units, we provide discussion of strategraphic evidence pertaining to physiographic relations and geologic history of volcaniclastic deposits derived from ancestral Mount Spurr, multiple phases of Quaternary glacial activity, Chakachatna River valley landslide complexes...
Tags: Alaska Earthquake 1964,
Alluvial Fan,
Beluga Plateau,
Beluga River,
Blockade Glacier, All tags...
Capps Glacier,
Chakachatna River,
Chakachatna-McArthur Embayment,
Chalcedony,
Chigmit Mountains,
Chuitna Coal Project,
Chuitna River,
Coastal Plain,
Colluvium,
Cook Inlet,
Cook Inlet Basin,
Correlation,
Debris Avalanche,
Depositional Environment,
Diamictons,
Earthquake Related Slope Failure,
Erratics,
Fault Displacement,
Glacial Geology,
Glacier Outburst Flood,
Glacioestuarine Deposits,
Jasper,
Jokulhlaup,
Lahar,
Landslide Deposit,
Little Ice Age,
Moraines,
Mount Spurr,
Neacola Mountains,
Neoglacial,
Neotectonics,
Penultimate Glaciation,
Radiocarbon Ages,
Rotational Landslide,
STATEMAP Project,
Sediment Gravity Flow,
Straight Creek,
Surface Fault Rupture,
Surficial Geologic Map,
Surficial Geology,
Susitna Lowland,
Tectonics,
Threemile Creek,
Till,
Tordrillo Mountains,
Tyonek,
Tyonek Quadrangle,
Volcaniclastic Deposits,
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
This map illustrates the distribution of unconsolidated deposits and undifferentiated bedrcok units in the Salcha River-Pogo area.It was prepared by interpretation of 1:63,360-scale false-color infrared aerial photographs taken July 1978, July 1979, and August 1981, and is locally verified by ground observations during field visits.
Tags: Big Delta Quadrangle,
Goodpaster River,
Pogo,
Salcha River,
alluvium, All tags...
colluvium,
debris flow deposit,
glacial drift,
landslide deposit,
pingos,
retransported loess,
surficial geology,
terrace,
unconsolidated deposits, Fewer tags
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