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Radiocarbon Data from Coastal Environments on Montague Island, Alaska This dataset consists of sample descriptions and radiocarbon age data from coastal environments on Montague Island, Alaska, analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility. Categories: Data; Tags: Alaska, Biota, Carbon-14 analysis, Coastal processes, Earth science, All tags... Earthquakes, Geology, GeoscientificInformation, Hazards, Montague Island, Prince William Sound, Seismology, Tectonic processes, USGS Science Data Catalog (SDC), Fewer tags Annual End-of-Summer Snow Cover on Glaciers in Alaska and Northwest Canada This dataset contains observations of the distribution of end-of-summer snow cover on approximately 3000 glaciers across Alaska and Northwest Canada. The data are provided as: (1) GeoTIFF rasters indicating the spatial extent of end-of-summer snow cover on each glacier's surface in each year (one raster per glacier per year), and (2) yearly tables with the equilibrium line altitude and the accumulation area ratio of the glaciers derived from the snow cover extent geotiffs. Snow cover was identified in Sentinel-2 imagery using a random forest algorithm trained with a manually-created validation dataset. A series of post-processing steps were used to infill missing data from terrain shadowing and cloud cover, and... Categories: Data; Tags: Accumulation Zones, Alaska, Canada, Cryosphere, GeoscientificInformation, All tags... Glacier Mass Balance, Glaciers, Glaciology, Glaciology, Snow, Snow and ice cover, USGS Science Data Catalog (SDC), Water Resources, Fewer tags Cryptosporidium and Giardia Occurrence Data in Wildlife from Arctic Alaska, 2012-2017 This dataset consists of one table with sample collection locations and results of screening resident wildlife for Cryptosporidium and Giardia in the Alaskan Arctic, 2012-2017. We analyzed feces collected from polar bear, Pacific walrus, Arctic fox, and caribou with MERIFLUOR direct immunofluorescence assay to determine the presence of Cryptosporidium oocysts and Giardia cysts. Categories: Data; Tags: Alaska, Animals/Vertebrates, Arctic fox, Biota, Caribou, All tags... Cryptosporidium, Cryptosporidium, Disease detection, Disease reservoirs, Disease vectors, Endangered species, Environment, Giardia, Giardia, Health and disease, Indicator species, MERIFLUOR Cryptosporidium/Giardia direct immunofluorescent assay, Mammals, Migratory species, Odobenus rosmarus divergens, Pacific walrus, Parasitic diseases, Polar bear, Rangifer tarandus, Tundra ecosystems, USGS Science Data Catalog (SDC), Ursus maritimus, Vulpes lagopus, Wildlife, Wildlife Biology, Wildlife Disease, Wildlife disease, Fewer tags Eelgrass (Zostera marina) Percent Cover Data from Katmai National Park and Preserve, Kenai Fjords National Park, and Prince William Sound, Alaska These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset has one comma separated values (.csv) table with estimates of eelgrass (Zostera marina) percent cover. Eelgrass cover was estimated from sonar and video drop cameras deployed from boats following prescribed survey transects. Categories: Data; Tags: Alaska, Alaska Peninsula, Angiosperms (flowering plants), Animal and plant census, Aquatic Biology, All tags... Biological productivity, Biota, Coastal ecosystems, Ecosystem monitoring, Eelgrass, Environment, Estuarine ecosystems, Gulf of Alaska, Katmai National Park and Preserve, Kenai Fjords National Park, Marine ecosystems, Monocots, Nearshore ecology, Prince William Sound, Relative abundance analysis, Seagrass, Seagrass beds, USGS Science Data Catalog (SDC), Wildlife Biology, Zostera marina, Fewer tags Selected Basin Boundaries for USGS Streamgages in Alaska through 2019 This dataset contains drainage basin boundaries for 253 U.S. Geological Survey (USGS) streamgages in Alaska that had at least 5 years of daily streamflow through September 30, 2017, three of which were delineated for alternate basin conditions. This compilation includes selected boundaries produced in 2014 (https://doi.org/10.5066/P143KNEJ). Additional basin boundaries were delineated from the streamgage location to the nearest USGS Watershed Boundary Dataset (WBD) HUC boundary and along HUC boundaries from that intersection to the basin headwaters. Streamgages selected for drainage basin delineation included streamgages in Alaska that met selection criteria for a statewide study of seasonal flow regimes (Curran... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Discharge/flow, Hydrographic datasets, Hydrology, Hydrology, All tags... InlandWaters, Rivers/streams, Terrestrial Hydrosphere, USGS Science Data Catalog (SDC), Water Resources, Fewer tags Genetic Data from Arctic, Polar, and Saffron Cod and Walleye Pollock, Alaska and Canada, 2011-2017 Fragment data from 11 nuclear microsatellite loci and sequence data from the mitochondrial cytochrome b gene were gathered from Arctic cod (Boreogadus saida) in the Beaufort and Chukchi seas. Mitogenomic analyses of Arctic cod and three other co-distributed gadoids (Polar cod [Arctogadus glacialis], Saffron cod [Eleginus gracilis], Walleye Pollock [Gadus chalcogrammus]) were also completed. Transcriptomic analyses of Arctic cod were used to identify genes associated with environmental perturbations. Genome-wide scans using RAD-Seq of Arctic cod and the co-distributed Polar Cod were collected. Categories: Data; Tags: Alaska, Aleutian Islands, Aquatic Biology, Aquatic ecosystems, Aquatic sciences, All tags... Arctic cod, Arctogadus glacialis, Beaufort Sea, Beaufort Sea, Bering Sea, Biota, Boreogadus saida, Canada, Chukchi Sea, DNA sequencing, DNA, Mitochondrial, Eleginus gracilis, Environment, Fish, Fisheries, Gadus chalcogrammus, Gene flow, Genetic structure, Genetic variance, Genetics, Genetics, Genomics, Gulf of Alaska, Gulf of Saint Lawrence, Marine habitat, Microsatellite Repeats, Norton Sound, Nova Scotia, Polymerase chain reaction, Population dynamics, Population genetics, Saffron cod, Systematics and taxonomy, USGS Science Data Catalog (SDC), Walleye Pollock, Wildlife Biology, Yukon Territory, Fewer tags Gulf Watch Alaska Nearshore Component: Sea Otter Aerial Survey Data Katmai National Park and Preserve, 2008-2018 These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. Specifically, these data describe sea otter (Enhydra lutris) aerial survey observations from the waters around Katmai National Park and Preserve from surveys conducted in 2008, 2012, 2015, and 2018. Sea otters are a keystone predator, well known for structuring the nearshore marine ecosystem through their consumption of invertebrate prey. The dataset consists of 3 comma-delimited files (CSV) exported from Microsoft Excel. The data consists of (1) Strip transect counts, (2) Intensive Search Unit (ISU) counts, and (3) Transect coordinates. For each aerial survey, a pilot flew an airplane at an altitude... Categories: Data, Data Release - Revised; Tags: Abundance, Aerial survey, Alaska, Animals/Vertebrates, Aquatic Biology, All tags... Aquatic ecosystems, Benthic habitat, Biota, Coastal habitat, Distribution, Ecology, Ecology, Ecosystem monitoring, Enhydra lutris, Environment, Gulf of Alaska, Intertidal environments, Katmai National Park and Preserve, Marine environment monitoring, Marine mammals, Otters, Population dynamics, Sea otters, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Child Item 3: Rocky Intertidal Invertebrate and Algae Cover from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park This is a child item of the USGS Data Release: https://doi.org/10.5066/F7513WCB. These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset has six comma separated values (.csv) file exported from a Microsoft Access relational database. The data consist of percent cover and point contact data from algae and invertebrates at intertidal rocky substrate sampling sites. Tables include: 1) intertidal cover, 2) intertidal percent cover, 3) intertidal top layer percent cover, 4) intertidal substrate percent cover, 5) taxonomic classification, and 6) Gulf Watch Alaska contributors. Version History: First release: September 2022 Revised: October 2023 (ver.... Categories: Data; Tags: Alaska, Alaska Peninsula, Algae, Algae, Animals/Invertebrates, All tags... Aquatic biology, Aquatic ecosystems, Biospheric indicators, Biota, Community ecology, Ecology, Ecosystem monitoring, Environment, Gulf of Alaska, Intertidal environments, Intertidal zone, Katmai National Park and Preserve, Kenai Fjords National Park, Macroinvertebrates, Marine ecosystems, Marine invertebrates, Mollusks, Nearshore ecology, Prince William Sound, USGS Science Data Catalog (SDC), Wildlife biology, Wildlife disease, Fewer tags Genetic Data from Cooper's Hawks (Accipiter cooperii), North America This data set describes nuclear microsatellite genotypes derived from six autosomal loci (AgCA222, Age7.1JT, BV13, BV20, NVH206, NVH195-2) in Cooper's Hawks. Samples originated from blood samples collected from live trapped birds. Version History: First release: December 2020 Revised: February 2022 (ver. 2.0) Categories: Data; Tags: Accipiter cooperii, AgCA222, Age7.1JT, Alleles, Animals/Vertebrates, All tags... BV13, BV20, Biota, Birds, Birds of prey, British Columbia, Cooper's Hawk, DNA, Eagles/Falcons/Hawks and Allies, Environment, Gene Flow, Genetic Markers, Genetics, Genetics, Genotype, Microsatellite Repeats, NVH195-2, NVH206, North Dakota, Polymerase chain reaction, Population Genetics, Raptors, Site Fidelity, Terrestrial ecosystems, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Wisconsin, Fewer tags Data from Black Brant (Branta bernicla nigricans) Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico This data package includes 2 child items with data from Pacific Black Brant (Branta bernicla nigricans) during winter and migration periods. Child Item 1: "Body mass, Morphological Measurements, Flock Counts, and Age-Ratios from Black Brant Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico". The data include: (1) body mass and morphological measurements from sport hunter harvested brant, and (2) census counts of brant in Bahia de San Quintin, (3) counts for flock age ratio determination, and (4) behavior. Child Item 2: "Black Brant (Branta bernicla nigricans) Radio Detection and Migration Timing Alaska to Mexico". Data from brant tagged with VHF radio transmitters in July 1999 on the Yukon... Categories: Data; Tags: Alaska, Animal populations, Animals/Vertebrates, Bahia San Quintín, Baja California, All tags... Baja California Sur, Biota, Birds, Black Brant, Branta bernicla nigricans, Brent Goose, Coastal ecosystems, Ecological dynamics, Environment, Izembek National Wildlife Refuge, Laguna Ojo de Liebre, Laguna San Ignacio, Mexico, Migratory birds, Population dynamics, Species life history, Species/population interactions, USGS Science Data Catalog (SDC), Waterfowl, Wildlife, Wildlife Biology, Yukon Delta, Yukon Delta National Wildlife Refuge, Yukon Kuskokwim Delta, Fewer tags Eagle Airborne Magnetic and Radiometric Geophysical Survey The Eagle airborne magnetic and radiometric geophysical survey covers parts of the Charley River, Eagle, and Tanacross quadrangles near Eagle, Alaska (fig. 1). Magnetic and radiometric data were collected with a fixed-wing aircraft May 24 to June 27, 2021 by MPX Geophysics LTD. A total of 26,926 line kilometers were collected covering 9,731 square kilometers. The magnetometer was mounted to a rear-facing fixed boom (tail stinger). The radiometric crystals were located in the cabin of the aircraft. The Eagle survey was flown with a line spacing of 400 meters (m) and a mean ground clearance of 330 m. The data, as well as additional metadata, are available from the DGGS website: https://doi.org/10.14509/30755. USGS... Categories: Data; Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Alder Creek, Alma Creek, American Creek, Anaconda Creek, Analytic Signal, Arctic Creek, Arctic Dome, Arkansas Creek, Aurora Creek, Barney Creek, Bear Creek, Ben Creek, Black Diamond Creek, Bluff Creek, Bonanza Creek, Boulder Creek, Boundary Creek, Bow Creek, Broken Neck Creek, Bryan Creek, Bryant Creek, Buck Creek, Buckeye Creeek, Buckeye Creek, Buckskin Creek, Bullion Creek, Butte Creek, Calico Bluff, Canyon Creek, Caribou Creek, Cassiar Creek, Castalia Creek, Cedar Creek, Champion Creek, Chicago Boy Creek, Clifford Creek, Colorado Creek, Columbia Creek, Comet Creek, Confederate Creek, Copper Creek, Crab Creek, Cripple Creek, Crooked Creek, Crowley Creek, Curtis Bar Creek, DGGS, Deadman Island, Deep Creek, Deer Creek, Dewey Creek, Diamond Fork, Dick Dale Creek, Dime Creek, Discovery Creek, Discovery Fork, Dome Creek, Dominion Creek, Eagle, Eagle Bluff, Eagle Creek, Easter Creek, Eldorado Creek, Enterprise Creek, Eva Creek, Excelsior Creek, Exploration, Fish Creek, Flat Creek, Flume Creek, Ford Lake, Fortymile Dome, Fortymile River, Fox Creek, Geologic, Geology, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Georgie Creek, Gillman Creek, Glacier Mountain, Glenn Creek, Gold Bottom Creek, Gold Creek, Granite Creek, Green Creek, Gridded Data, Happy New Year Creek, Hilda Creek, Hutchinson Creek, Independence Creek, Iron Creek, Jim Creek, John Shedd Creek, Joseph, Joseph Creek, Kechumstuk Creek, King Creek, King Solomon Creek, Last Chance Creek, Line Data, Logan Creek, Lost Creek, Lousy Creek, Magnetic Data, Magnetic Survey, Magnetics, Manila Creek, Mariner Creek, Marion Creek, Merry Christmas Creek, Michigan Creek, Mineral Resources, Mission Creek, Missoula Creek, Mogul Creek, Molly Creek, Montana Creek, Moose Creek, Mosquito Fork, Mount Eldridge, Mount Harper, Mount Veta, Mount Warbelow, My Creek, North Peak, Norvell Creek, Nugget Creek, Ole Creek, Oregon Creek, Our Creek, Pennsylvania Creek, Phoenix Creek, Pittsburgh Creek, Placer Creek, Polly Creek, Portage Creek, Powee Creek, Quartz Creek, Queen of Sheba Creek, Remote Sensing, Rock Creek, Ruby Creek, Sam Patch Creek, Seventymile, Seventymile River, Seward Creek, Shade Creek, Sheba Mountain, Silver Bow Creek, Sinnott Creek, Slate Creek, Smith Creek, Snow Creek, Sonickson Creek, South Boundary Creek, Steele Creek, Strawberry Dome, Surprise Creek, Telegraph Creek, Thurston Creek, Trail Creek, Twin Creek, USGS Science Data Catalog (SDC), Union Creek, Utah Creek, Van Milligan Creek, Veta Creek, Wallcutt Mountain, Washington Creek, Willow Creek, Wilson Creek, Wolf Creek, Yukon River, Yukon-Tanana Upland, geoscientificInformation, Fewer tags Macroinvertebrates from Rivers in Northwest Alaska, 2015-2019 This dataset contains taxonomic information, counts, and lengths of macroinvertebrates collected from rivers in northwest Alaska using drift and kick nets during summer and fall 2015-2019. Version History: First release: February 2024 Revised: August 2024 (ver. 1.1) Categories: Data; Tags: Actinopterygii, Age composition, Alaska, Animals/Invertebrates, Animals/Invertebrates, All tags... Aquatic Biology, Aquatic Invertebrates, Aquatic ecosystems, Arachnida, Arctic, Arthropods, Arthropods, Biota, Bivalvia, Clitellata, Ecology, Entognatha, Environment, Freshwater ecosystems, Gastropoda, InlandWaters, Insecta, Macroinvertebrates, Nemata, Turbellaria, USGS Science Data Catalog (SDC), Water Quality, Fewer tags Child Item 6: Zooplankton Biomass Data from Gulf of Alaska Fjords, 2010-2011 This is a child item of the USGS Data Release: https://doi.org/10.5066/F7K072DR. This dataset includes zooplankton biomass from Prince William Sound, Icy Bay and Yakutat Bay, Alaska. Zooplankton were sampled with a ring net (0.6 m diameter with 211 µ mesh) on a 50 m vertical haul or to within 5 m of the bottom in shallow water. Zooplankton samples were identified to species and life stage when possible. Categories: Data; Tags: Alaska, Aquatic Biology, Biomass, Biota, Ecology, All tags... Ecosystem monitoring, Environment, Field inventory and monitoring, Fresh water river discharge, Glacier Bay, Gulf of Alaska, Icy Bay, Marine ecosystems, Ocean characteristics, Ocean monitoring, Oceans, Prince William Sound, Specimen sampling, Stage, USGS Science Data Catalog (SDC), Water Quality, Water sampling, Wildlife Biology, Yakutat Bay, Zooplankton, m3, Fewer tags Child Item 6: Total Carbon, Organic Carbon, and Nitrogen Data from a Subset of Soils Within the Yukon River Basin Total and organic carbon values from soil samples taken from the Yukon River Basin, Alaska. These samples were used to create a relationship between total carbon and organic carbon for samples which were only run for total carbon. This is a child item of the USGS Data Release: https://doi.org/10.5066/P9QF8RR5 Categories: Data; Tags: Alaska, Biogeochemical cycles, Biomass, Biomass dynamics, Biota, All tags... Community ecology, Community structure, Ecology, Environment, Lake drying, Landscape ecology, Plants, Primary production, Soil carbon storage, Succession (biological), Terrestrial ecosystems, USGS Science Data Catalog (SDC), Vegetation cover, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Child Item 2: Aboveground Net Primary Production Estimates from the Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where samples were obtained, the historical dynamics of that lake, the sampled community type, and the dry mass of annual new growth. Shrub community measurements are a combination of understory mass from quadrat harvests and shrub stem mass derived from published allometric equations. This is a child item of the USGS Data Release: https://doi.org/10.5066/P9QF8RR5 Categories: Data; Tags: Alaska, Biogeochemical cycles, Biomass, Biomass dynamics, Biota, All tags... Community ecology, Community structure, Ecology, Environment, Lake drying, Landscape ecology, Plants, Primary production, Soil Science, Soil carbon storage, Succession (biological), Terrestrial ecosystems, USGS Science Data Catalog (SDC), Vegetation cover, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Child Item 3: Soil Properties of Lake-Margin Wetlands of the Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where samples were obtained, soil pH, electrical conductivity (EC), water content (VWC), and bulk density (BD) of soil core samples within organic soil horizon in lake-margin wetland plant communities. This is a child item of the USGS Data Release: https://doi.org/10.5066/P9QF8RR5 Categories: Data; Tags: Alaska, Biogeochemical cycles, Biomass, Biomass dynamics, Biota, All tags... Community ecology, Community structure, Ecology, Environment, Lake drying, Landscape ecology, Plants, Primary production, Soil Science, Soil carbon storage, Succession (biological), Terrestrial ecosystems, USGS Science Data Catalog (SDC), Vegetation cover, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Child Item 1: Argos Satellite Tracking Data for Yellow-billed Loons (Gavia adamsii) - Processed Data This metadata document describes the data contained in the "Argos Processed Data" (Child Item 1) of this data release. This data release contains all data collected by the Argos System from 92 satellite transmitters attached to adult Yellow-billed Loons on their breeding range in Arctic Alaska and Canada, 2002-2017. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "Argos Processed Data" (Child Item 1) of this data release: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility... Categories: Data; Tags: Alaska, Animal tracking, Animals/Vertebrates, Argos, Atqasuk, All tags... Biota, Birds, Breeding area, Breeding sites, Cambridge Bay, Canada, Chipp River, Distribution, East Asia flyway, Ecological Dynamics, Environment, Gavia adamsii, Ikpikpuk, Inigok, Loons, Migration, Migration (organisms), Migration pathway, Migratory birds, Migratory strategies, NPR-A, National Petroleum Reserve-Alaska, North Slope, Northwest Territories, Nunavut, Ornithology, Overwintering, PTT, Pacific Americas flyway, Platform Transmitter Terminal, Satellite transmitter, Seasonal distribution, Seasonal movement, Seward Peninsula, Species Life History, Species Migration, Telemetry, Tracking equipment, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Wintering area, Yellow-billed loon, Fewer tags Tracking Data for Pacific Loons (Gavia pacifica) This data release includes 1 child item with tracking data for Pacific Loons, a species that breeds throughout much of Alaska and winters throughout the Pacific Ocean basin, along the coasts of East Asia and North America. Child Item 1: "Argos Satellite Tracking Data for Pacific Loons (Gavia pacifica) - Processed Data" Quality-controlled data collected from Argos satellite transmitters. Categories: Data; Tags: Alaska, Animal tracking, Animals/Vertebrates, Argos, Biota, All tags... Birds, Breeding area, Breeding sites, Colville River Delta, Distribution, Ecological Dynamics, Environment, Gavia pacifica, Loons, Migration, Migration (organisms), Migration pathway, Migratory birds, Migratory strategies, North Slope, Ornithology, Overwintering, PTT, Pacific Americas flyway, Pacific Loons, Platform Transmitter Terminal, Satellite transmitter, Seasonal distribution, Seasonal movement, Species Life History, Species Migration, Staging area, Telemetry, Tracking equipment, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Tracking Data for Red-throated Loons (Gavia stellata) This data release includes 2 child items with tracking data for Red-throated Loons, a species that breeds in coastal areas throughout Alaska and winters along the Pacific coasts of North America and Eurasia. Child Item 1: "Argos Satellite Tracking Data for Red-throated Loons (Gavia stellata) - Processed Data" Quality-controlled data collected from Argos satellite transmitters. Child Item 2: "Argos Satellite Tracking Data for Red-throated Loons (Gavia stellata) - Raw Data" All raw data collected from Argos satellite transmitters, provided for completeness of the archive. The "Argos Processed Data" (Child Item 1) are better suited for most analytical purposes. Version History: First release: December 2017 Revised:... Categories: Data, Data Release - Revised; Tags: Alaska, Animal tracking, Animals/Vertebrates, Argos, Biota, All tags... Birds, Breeding area, Breeding sites, Copper River Delta, Distribution, East Asia flyway, Ecological Dynamics, Environment, Gavia stellata, Loons, Migration, Migration (organisms), Migration pathway, Migratory birds, Migratory strategies, NPR-A, National Petroleum Reserve-Alaska, North Slope, Ornithology, Overwintering, PTT, Pacific Americas flyway, Platform Transmitter Terminal, Point Lay, Red-throated Loon, Satellite transmitter, Seasonal distribution, Seasonal movement, Seward Peninsula, Species Life History, Species Migration, Telemetry, Tracking equipment, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Wintering area, Yukon Delta, Yukon Delta National Wildlife Refuge, Yukon-Kuskokwim River Delta, Fewer tags Selected Whole-Rock and Sediment Geochemistry Reanalysis Data Additions to the Alaska Geochemical DataBase (AGDB) from Archived Samples, Alaska 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, All tags... Bering Sea, Brooks Range, Chugach Mountains, Geochemistry, Gulf of Alaska, Kuskokwim Mountains, Mineral Resources, Seward Peninsula, USGS Science Data Catalog (SDC), United States, Wrangell Mountains, aluminum, antimony, arsenic, barium, beryllium, boron, cadmium, calcium, cerium, cesium, chemical analysis, chromium, cobalt, copper, dysprosium, earth science, earth sciences, erbium, europium, ferric iron, ferrous iron, gadolinium, gallium, geochemistry, geochemistry, geoscientificInformation, germanium, gold, hafnium, holmium, indium, iron, lanthanum, lead, lithium, lutetium, magnesium, manganese, mercury, mineral resources, mineralogy, molybdenum, neodymium, nickel, niobium, palladium, potassium, praseodymium, rhenium, rubidium, samarium, scandium, selenium, silicon, silver, sodium, strontium, sulfur, tantalum, tellurium, terbium, thallium, thorium, thulium, tin, titanium, tungsten, uranium, vanadium, ytterbium, yttrium, zinc, zirconium, Fewer tags 1 2 3 4 5 ... 11 »