Filters: Tags: Chugach Mountains (X)
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This data release contains elemental concentration data from the reanalysis of 13,930 archived stream-sediment sample and associated stream sediment reference material and 968 archived rock samples and associated rock reference material. All archived material was from samples that were collected in Alaska. Samples were retrieved from the USGS Mineral Program's sample archive in Denver, CO. Sample processing consisted of splitting the appropriate aliquot for the requested analyses. Sample splitting was performed in the USGS Mineral Program's sample prep facilities. 13,800 samples were analyzed using a multi-element analytical method involving decomposition of the sample by sodium peroxide and elemental analysis by...
Categories: Data;
Tags: Alaska,
Alaska Range,
Aleutian Islands,
Aleutian Range,
Alexander Archipelago,
Alaska Glaciers. Chugach Mountains and Columbia Glacier. View from west of Heather Island. Valdez district, Alaska. August 31, 1943.
Categories: Image;
Tags: Alaska,
Alaska Glaciers,
Chugach Mountains,
Columbia Glacier,
Fellows, R.E. Collection,
Alaska Glaciers. Chugach Mountains and Columbia Glacier. View north from entrance to Columbia Bay. Valdez district, Alaska. August 31, 1943.
Categories: Image;
Tags: Alaska,
Alaska Glaciers,
Chugach Mountains,
Columbia Glacier,
Fellows, R.E. Collection,
Glenn Highway at mile 112 from Anchorage; view toward west to Glacier Point and Chugach Mountains. Spur of Sheep Mountain on right. Road built on alluvial fan of volcanic rocks at this point. Snow cover of 1.5 to 2 feet. Road gravel, but snow road provides smooth driving surface with good traction at negative temperatures. Southwest Copper River Basin, Alaska. February 6, 1950.
Alaska Glaciers. Barry Glacier, which is east of Anchorage in the Chugach Mountains. August 22, 1943.
Categories: Image;
Tags: Alaska,
Alaska Glaciers,
Barry Glacier,
Chugach Mountains,
Fellows, R.E. Collection,
An ASD FieldSpec 4 Hi-Res NG Spectroradiometer was used to collect the reflectance properties of soil and rock in Prince William Sound (Figure 1). Reflectance is a property of the material being observed, being the ratio of the amount of light leaving a target to the amount of light striking the target. Reflectance is a unitless value from 0 to 1, where a value of 0 indicates that the material absorbs all energy and 1 indicates total reflectance. The ASD FieldSpec 4 Hi-Res NG is a point spectrometer that has a spectral range of 350 to 2500 nm, covering the visible and near-infrared (VNIR) and short-wave infrared (SWIR) portions of the electromagnetic spectrum. The spectral resolution is 3 nm at 700 nm and 6 nm at...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Chugach Mountains,
Chugach National Forest,
Geochemistry,
Hazard,
Landslides,
Alaska Glaciers. Chugach Mountains and Columbia Glacier. View from approximately 1 mile south of Heather Island. Valdez district, Alaska. August 31, 1943.
Categories: Image;
Tags: Alaska,
Alaska Glaciers,
Chugach Mountains,
Columbia Glacier,
Fellows, R.E. Collection,
This geologic map and preliminary cross sections of central and east Anchorage, Alaska, are based on previous mapping, limited new photointerpretation, and available subsurface data. Using PC-based Geographic Information System (GIS) software, the existing geologic map has been updated and simplified by adding recent fill deposits and combining units of similar genesis, composition, and age that are also recognizable in the subsurface. The GIS database consists of a USGS geologic map and over 4,000 geotechnical boreholes and water-well logs provided by numerous public and private sources. Geologic cross sections were developed by using GIS to project graphic lithologic logs into scaled vertical layouts along selected...
Alaska. Looking down a rock glacier near Slender Lake northeast of Cordova in the Chugach Mountains. The rock is diorite. 1959.
Categories: Image;
Tags: Alaska,
Brabb, E.E. Collection,
Chugach Mountains,
Photographers,
color transparency (slides)
Alaska Glaciers. Front of Columbia Glacier, which is west of Valdez in the Chugach Mountains, viewed from about half a mile south of it. August 31, 1943.
Categories: Image;
Tags: Alaska,
Alaska Glaciers,
Chugach Mountains,
Columbia Glacier,
Fellows, R.E. Collection,
An ASD FieldSpec 4 Hi-Res NG Spectroradiometer was used to collect the reflectance properties of soil and rock in southcentral Alaska, USA (Figure 1) around the city of Anchorage (Figure 2) and the Prince William Sound (Figure 3). Reflectance is a property of the material being observed, being the ratio of the amount of light leaving a target to the amount of light striking the target. Reflectance is a unitless value from 0 to 1, where a value of 0 indicates that the material absorbs all energy and 1 indicates total reflectance. Additionally, samples were collected from the field and later measured using the spectrometer in the laboratory. Both field and laboratory data were collected in the summer and fall of 2022....
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Anchorage, Alaska,
Chugach Mountains,
Chugach National Forest,
Chugach State Park,
Hyperspectral Imaging,
The Alaska Geochemical Database Version 4.0 (AGDB4) contains geochemical data compilations in which each geologic material sample has one best value determination for each analyzed species, greatly improving efficiency of use. The relational database includes historical geochemical data archived in the USGS National Geochemical Database (NGDB), the Atomic Energy Commission National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance databases, and the Alaska Division of Geological and Geophysical Surveys (DGGS) Geochemistry database. Data from the U.S. Bureau of Mines and the U.S. Bureau of Land Management are included as well. The data tables describe historical and new quantitative...
The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project, 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 throughout Alaska. In 2014 and 2015 DGGS also collected and geochemically analyzed 114 rock samples from mafic and ultramafic rocks to evaluate the Tonsina area's potential for platinum-group elements, nickel, and chromium; analytical results are presented in this report.
The Alaska Geochemical Database Version 3.0 (AGDB3) contains new geochemical data compilations in which each geologic material sample has one best value determination for each analyzed species, greatly improving speed and efficiency of use. Like the Alaska Geochemical Database Version 2.0 before it, the AGDB3 was created and designed to compile and integrate geochemical data from Alaska to facilitate geologic mapping, petrologic studies, mineral resource assessments, definition of geochemical baseline values and statistics, element concentrations and associations, environmental impact assessments, and studies in public health associated with geology. This relational database, created from databases and published...
Categories: Data,
Data Release - Revised;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: AGDB,
AMRAP,
Alaska Geochemical Database,
Alaska Mineral Resource Assessment Program,
Alaska Range,
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