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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
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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