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Between 27 and 11 kyr ago, during the last major (Naptowne) glaciation, the northwestern and western Kenai Peninsula and the Cook Inlet trough were covered by ice except for local nunataks and small refugia, like the Caribou Hills. Landforms related to four glacial stades are recognized and paleogeographic maps document ice limits, drainage systems, glacial-impounded lakes, and glaciomarine terraces. Numerous multidisciplinary studies of glacial, vegetation, and insect histories document Holocene climatic changes.
Tags: Alluvial Deposits,
Climate Change,
Coastal Erosion,
Cook Inlet,
Erosion, All tags...
Geologic Hazards,
Geology,
Geomorphology,
Glacial Deposits,
Glacial Drift,
Glacial Geology,
Glaciation,
Gravel,
Homer,
Ice,
Ice Contact Deposits,
Ice-Contact,
Kenai Peninsula,
Kenai Quadrangle,
Kenai Spur Highway,
Meltwater,
Outwash,
Radiocarbon Dating,
Seldovia Quadrangle,
Seward Highway,
Seward Quadrangle,
Sterling Highway,
Surficial Geology,
Tephra,
Tephrachronology,
Terrace,
Tsunami,
Vegetation,
geoscientificInformation, Fewer tags
During 2009 the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted reconnaissance interpretive mapping of permafrost in Alaska Highway Corridor Segment 3, a 12-mi-wide (19.3-km-wide) corridor that straddles the Alaska Highway through the Northway-Tanacross Lowland and the southern Yukon-Tanana Upland from Tetlin Junction to the Canada border. This work was an extension of permafrost mapping done in Alaska Highway Corridor Segment 1 from Delta Junction to Dot Lake in the Big Delta and Mt. Hayes Quadrangles during 2006-2007 and Alaska Highway Corridor Segment 2 from the Robertson River to Tetlin Junction in the Tanacross Quadrangles during 2008. Primarily, we inferred the extent of permafrost and...
Tags: Alaska Highway Corridor,
Alaska, State of,
Beaver Creek,
Canada,
Chisana River, All tags...
Climate Change,
Engineering Geology,
Gasline,
Geologic Hazards,
Geologic Map,
Geological Process,
Geology,
Ice,
Midway Lake,
Nabesna,
Nabesna Quadrangle,
Nabesna River,
Northway,
Northway Junction,
Permafrost,
Pingos,
Proposed Natural Gas Pipeline,
Remote Sensing,
Scottie Creek,
Subsidence,
Tanacross,
Tanacross Quadrangle,
Tanana River,
Tetlin Junction,
Tetlin National Wildlife Refuge,
Thaw Lakes,
Transportation Corridor,
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 geologic construction materials and geologic hazards data. The Tanana A-1 and A-2 Quadrangles and surrounding area comprise several isolated mountainous ridges in the western Yukon-Tanana Upland of interior Alaska.
Tags: Aerial Photography,
Construction Materials,
Decorative Stone,
Economic Geology,
Engineering Geology, All tags...
Floods,
Ice,
Land Subsidence,
Landslide,
Liquefaction,
Manley Basin,
Manley Hot Springs,
Permafrost,
Resource Assessment,
Sand & Gravel,
Surficial Geology,
Yukon River,
geoscientificInformation, Fewer tags
During 2006 and 2007 the Alaska Division of Geological & Geophysical Surveys conducted reconnaissance interpretive mapping of permafrost in Alaska Highway Corridor Segment 1, which straddles the Alaska Highway through the Tanana River valley from Delta Junction to the eastern boundary of the Mt. Hayes Quadrangle. Primarily, we inferred the extent of permafrost and ice content by interpreting ~1:63,360-scale, false-color infrared aerial photographs taken in August 1980.
Tags: Alaska Highway Corridor,
Big Delta,
Big Delta Quadrangle,
Delta Junction,
Delta River, All tags...
Dot Lake,
Engineering Geology,
Gasline,
Geologic Hazards,
Geologic Map,
Ice,
Lake George,
Mount Hayes Quadrangle,
Permafrost,
Pingos,
Proposed Natural Gas Pipeline,
Subsidence,
Tanana River,
Thaw Lakes,
Transportation Corridor, Fewer tags
During 2008 the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted reconnaissance interpretive mapping of permafrost in Alaska Highway Corridor Segment 2, a 12-mi-wide (19.3-km-wide) corridor that straddles the Alaska Highway through the upper Tanana River valley from the eastern boundary of the Mt. Hayes Quadrangle to the eastern edge of the Tanacross Quadrangle. This work was an extension of permafrost mapping done in Alaska Highway Corridor Segment 1 from Delta Junction to Dot Lake in the Big Delta and Mt. Hayes Quadrangles during 2006-2007. Primarily, we inferred the extent of permafrost and ice content by interpreting ~1:65,000-scale, false-color infrared aerial photographs taken in July 1978,...
Tags: Alaska Highway Corridor,
Alaska Range,
Alaska, State of,
Climate Change,
Dot Lake, All tags...
Engineering Geology,
Gasline,
Geologic Hazards,
Geologic Map,
Geological Process,
Geology,
Ice,
Permafrost,
Pingos,
Proposed Natural Gas Pipeline,
Remote Sensing,
Robertson River,
Subsidence,
Tanacross,
Tanacross Quadrangle,
Taylor Highway,
Thaw Lakes,
Tok,
Tok River,
Transportation Corridor,
geoscientificInformation, Fewer tags
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