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A physiographically prominent, approximately 40 square km plateau lies roughly 20 km east of Mount Spurr volcano, northwestern Cook Inlet region, Alaska, and comprises the preserved remnant of a volcaniclastic succession, designated in this study as map unit Qvc. Although this readily mappable package of volcaniclastic rocks has been recognized in numerous studies during the past five decades, uncertainties regarding its age and origin have persisted. We describe the general characteristics of the volcaniclastic plateau, provide new age constraints for deposits, present lithofacies descriptions and interpretations of the volcaniclastic strata, and synthesize our observations and lithofacies analysis to propose an...
Tags: Age Dates,
Alluvial,
Alluvial Deposits,
Bedrock,
Bedrock Geology, All tags...
Capps Glacier,
Debris Flow,
Debris Flow Deposit,
Depositional Environment,
Depositional Environments,
Detrital Zircon,
Facies Analysis,
Geochronology,
Geological Process,
Geology,
Lahar,
Lahar Runout Flow,
Liquefaction,
Mount Spurr,
Paleoenvironment,
Paleogeography,
STATEMAP Project,
Sediment Transport,
Sedimentary,
Sedimentary Rocks,
Sedimentation,
Sedimentology,
Tyonek Quadrangle,
U-Pb,
Volcaniclastics,
geoscientificInformation, Fewer tags
This report provides detailed (1:63,360-scale) mapping of the Tanana A-1 and A-2 quadrangles (500 square miles; equivalent to eight 7.5-minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the south of the Tanana B-1 Quadrangle. This report includes detailed bedrock, surficial, structural, and stratigraphic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the report also includes derivative maps of geologic construction materials and geologic hazards. The Tanana A-1 and A-2 Quadrangles and surrounding area comprise several isolated mountainous ridges in the western Yukon-Tanana Upland...
Tags: 40Ar/39Ar,
Aerial Photography,
Aeromagnetic Map,
Aeromagnetic Survey,
Age Dates, All tags...
Bibliography,
Biostratigraphy,
CIPW Norms,
Carbonates,
Cerium,
Clastics,
Conductivity Survey,
Core Logs,
Cultural Resources,
Depositional Environment,
Diagenesis,
Disseminated,
Economic Geology,
Economic Study,
Electromagnetic Survey,
Epithermal,
Erosion,
Faulting,
Folding,
Fossils,
Geologic Map,
Geomorphology,
Geophysical Map,
Glacial,
Glacial Processes,
Gold,
Greenschist,
Greisen,
Historic Resources,
Hot Springs,
K-Ar,
Lab Methods,
Lode,
Magnetic Susceptibility,
Magnetometer Survey,
Major Oxides,
Manley Basin,
Marine,
Measured Stratigraphic Section,
Metamorphic Grade,
Metamorphism,
Mineralogy,
Mining,
Modal Analysis,
Niobium,
Ores,
Orogeny,
Paleobotany,
Paleocurrent,
Paleoenvironment,
Paleontology,
Palynology,
Petrogenesis,
Petrography,
Petrology,
Placer,
Plutonic,
Plutonic Hosted,
Precious Metals,
Production Data,
Provenance,
Rare Earth Elements,
Reconstructions,
Regional,
Regional Metamorphism,
Remote Sensing,
Resistivity Survey,
Resource Assessment,
Sandstone,
Sedimentary,
Sedimentation,
Shale,
Silver,
Structure,
Structure Map,
Surficial,
Tectonic Map,
Tectonics,
Terranes,
Topographic Map,
Turbidites,
Type Section,
Uplift,
Volcanic,
Volcanic Hosted,
Yukon River,
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
Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Sagavanirktok B-1 Quadrangle (640 square km�equivalent to four 7.5 minute quadrangles). This mapping project reinterprets micropaleontologic correlations for 17 Sagavanirktok Quadrangle wells, and reprocesses data from the one publicly-available seismic line. Surface geologic mapping, subsurface-to-surface stratigraphic age control, and seismic framework are required to reliably decipher the complex geology of this key area of the Brooks Range. Outcrops within the Sagavanirktok B-1 Quadrangle are the closest surface expressions of Prudhoe Bay source and reservoir rocks. This study yields critical petroleum-related...
Tags: Arctic National Wildlife Refuge,
Basins,
Biostratigraphy,
Brooks Range,
Carbonates, All tags...
Clastics,
Coal,
Depositional Environment,
Diagenesis,
Faulting,
Fluvial,
Folding,
Formations,
Fossils,
Geologic,
Glacial Processes,
Marine,
Marine Transgressions,
Measured Stratigraphic Section,
Modal Analysis,
North Slope Basin,
Orogeny,
Paleobotany,
Paleoenvironment,
Paleontology,
Palynology,
Petrography,
Petroleum,
Provenance,
Resource Assessment,
Sandstone,
Sedimentary,
Shale,
Shaviovik River,
Structure,
Surficial,
Tectonics,
Trace Fossils,
Turbidites,
Volcanic Ash,
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
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
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