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As part of the Department of Natural Resources (DNR) effort to make final recommendations of federal land parcels to be considered for selection by the State of Alaska according to provisions of the Statehood Act, a decision was made to identify and evaluate potential access corridors. Corridor maps were compiled for a total of 78 quadrangles throughout Alaska. This map suite shows relevant geologic information at a scale of 1:250,000 for 10-mile-wide corridors straddling centerlines for proposed access routes throughout Alaska. The maps are based on geologic data compiled from existing, published mapping. Each compiled corridor geology map was used to derive maps of potential construction materials, data quality,...
Tags: Alaska, State Of,
Ambler River Quadrangle,
Anchorage Quadrangle,
Aufeis,
Avalanche, All tags...
Baird Mountains Quadrangle,
Barrow Quadrangle,
Barter Island Quadrangle,
Beechey Point Quadrangle,
Bendeleben Quadrangle,
Bering Glacier Quadrangle,
Bethel Quadrangle,
Bettles Quadrangle,
Black River Quadrangle,
Bradfield Canal Quadrangle,
Candle Quadrangle,
Chandalar Quadrangle,
Chandler Lake Quadrangle,
Charley River Quadrangle,
Chignik Quadrangle,
Circle Quadrangle,
Cold Bay Quadrangle,
Construction Materials,
Cordova Quadrangle,
De Long Mountains Quadrangle,
Demarcation Point Quadrangle,
Dillingham Quadrangle,
Eagle Quadrangle,
Engineering,
Fairbanks Quadrangle,
Flaxman Island Quadrangle,
Geologic Materials,
Geology,
Glacier Outburst Flood,
Harrison Bay Quadrangle,
Hazards,
Healy Quadrangle,
Holy Cross Quadrangle,
Howard Pass Quadrangle,
Hughes Quadrangle,
Icing,
Iditarod Quadrangle,
Ikpikpuk River Quadrangle,
Iliamna Quadrangle,
Jokulhlaup,
Juneau Quadrangle,
Kantishna River Quadrangle,
Karluk Quadrangle,
Kateel River Quadrangle,
Killik River Quadrangle,
Lake Clark Quadrangle,
Lime Hills Quadrangle,
Livengood Quadrangle,
Lookout Ridge Quadrangle,
McGrath Quadrangle,
Meade River Quadrangle,
Medfra Quadrangle,
Melozitna Quadrangle,
Misheguk Mountain Quadrangle,
Mount Katmai Quadrangle,
Mount McKinley Quadrangle,
Mount Michelson Quadrangle,
Naknek Quadrangle,
Naled,
Noatak Quadrangle,
Norton Bay Quadrangle,
Nulato Quadrangle,
Ophir Quadrangle,
Permafrost,
Petersburg Quadrangle,
Philip Smith Mountains Quadrangle,
Port Moller Quadrangle,
Railroad,
Ruby Quadrangle,
Russian Mission Quadrangle,
Sagavanirktok Quadrangle,
Selawik Quadrangle,
Shungnak Quadrangle,
Sleetmute Quadrangle,
Solomon Quadrangle,
Survey Pass Quadrangle,
Taku River Quadrangle,
Talkeetna Quadrangle,
Tanana Quadrangle,
Taylor Mountains Quadrangle,
Teshekpuk Quadrangle,
Transportation Corridor,
Tyonek Quadrangle,
Ugashik Quadrangle,
Umiat Quadrangle,
Unalakleet Quadrangle,
Utukok River Quadrangle,
Wiseman Quadrangle,
geoscientificInformation, Fewer tags
The Alaska Volcano Observatory (AVO) uses an informal set of names for about 140 'volcanoes.' Some names refer to large, complex volcanic centers, while others indicate only a specific cone. This publication expands the list of 140 named volcanoes to include all volcanic vents where magma has reached the surface over the past 2.6 million years. This database of all known (published, or unpublished with permission) Quaternary volcanic vents was developed to better describe the nature and character of Quaternary volcanism in Alaska and specifically to aid in the discussion of spatial and temporal patterns of Alaska volcanism. This list is a preliminary starting point, and we hope that it is updated and expanded by...
Tags: Adak Quadrangle,
Alaska Peninsula,
Aleutian Islands,
Amukta Quadrangle,
Atka Quadrangle, All tags...
Baird Inlet Quadrangle,
Bendeleben Quadrangle,
Candle Quadrangle,
Chignik Quadrangle,
Cold Bay Quadrangle,
Cook Inlet,
Craig Quadrangle,
Fairbanks Quadrangle,
False Pass Quadrangle,
Gareloi Island Quadrangle,
Goodnews Bay Quadrangle,
Gulkana Quadrangle,
Hazards,
Healy Quadrangle,
Hooper Bay Quadrangle,
Iliamna Quadrangle,
Karluk Quadrangle,
Kenai Quadrangle,
Ketchikan Quadrangle,
Kiska Quadrangle,
Kotzebue Quadrangle,
Kwiguk Quadrangle,
Lake Clark Quadrangle,
Marshall Quadrangle,
McCarthy Quadrangle,
Mount Katmai Quadrangle,
Nabesna Quadrangle,
Naknek Quadrangle,
Nunivak Island Quadrangle,
Petersburg Quadrangle,
Port Moller Quadrangle,
Pribilof Islands Quadrangle,
Rat Islands Quadrangle,
Saint Lawrence Quadrangle,
Saint Michael Quadrangle,
Samalga Island Quadrangle,
Seguam Quadrangle,
Selawik Quadrangle,
Seward Peninsula,
Sitka Quadrangle,
Southeast Alaska,
Stepovak Bay Quadrangle,
Sutwik Island Quadrangle,
Tanacross Quadrangle,
Tyonek Quadrangle,
Ugashik Quadrangle,
Umnak Quadrangle,
Unalakleet Quadrangle,
Unalaska Quadrangle,
Unimak Quadrangle,
Valdez Quadrangle,
Volcanic Eruption,
Volcanoes,
Volcanology,
Wrangell Mountains,
geoscientificInformation, Fewer tags
40Ar/39Ar data from seven plutonic samples and one metamorphic sample collected during mineral assessment studies in 1991 show that various rock units in the Selawik Hills plutonic complex were emplaced in the order syenite/monzonite (nonfoliated, 106.6 ± 0.8 Ma; foliated, 101.7 ± 0.7 Ma; both on hornblende), followed by nepheline syenite (103.7 ± 0.8 Ma on hornblende) and then quartz monzonite (100.4 ± 3.7 Ma on biotite). 40Ar/39Ar data from Granite Mountain hornblendes yielded ages slightly older, but overlapping, those from Selawik Hills. In this suite, the silica-undersaturated phase appears to be younger (105.7 ±0.8 Ma) than the silica-saturated phase(s) (106.8 ± 0.8 Ma and 107.1 ± 0.8 Ma).
Tags: 40Ar/39Ar,
Age Dates,
Analytical Results,
Ar-Ar,
Candle Quadrangle, All tags...
Geochronology,
Granite,
Granite Mountain,
Hornblende,
Igneous Rocks,
Plutonic Rocks,
Selawik Quadrangle, Fewer tags
Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Inmachuk, Kugruk, Kiwalik, and Koyuk River drainages, Granite Mountain, and the northern Darby Mountains, Bendeleben, Candle, Kotzebue, and Solomon quadrangles, Alaska
The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska's statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For the geochemical part of the SCM Assessment, thousands of historical geochemical samples from DGGS, U.S. Geological Survey (USGS), and U.S. Bureau of Mines archives are being reanalyzed by DGGS using modern, quantitative, geochemical-analytical methods. The objective is to update the statewide geochemical database to more clearly...
Tags: Alaska, State of,
Analyses,
Analyses and Sampling,
Anchorage Quadrangle,
Bendeleben Quadrangle, All tags...
Candle Quadrangle,
Chemistry,
Critical Minerals,
Economic Geology,
Economic Study,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geology,
Kotzebue Quadrangle,
Mineral Assessment,
Mineral Deposit,
Mineral Development,
Mineral Localities,
Mineral Prospect,
Mineral Resources,
Minerals,
Non-Metals,
Platinum Group Elements,
Precious Metals,
Rare Earth Elements,
Ree,
Resource Assessment,
Resource Information,
Resources,
Sample Location,
Sediment,
Solomon Quadrangle,
Strategic Minerals,
Strategic and Critical Minerals Assessment Project,
Stream Sediments,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
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