Filters: partyWithName: U.S. Geological Survey, Alaska Science Center (X) > partyWithName: USGS ScienceBase Team (X)

Folders: ROOT > ScienceBase Catalog ( Show direct descendants )

Location Folder Show Tree ROOT _ScienceBase Catalog 3DSC Alaska Science Center (ASC) Alkalic Igneous Centers of the Great Plains and Rocky Mountains: Data in Support of Critical Mineral Resource Studies AMMonitor: Remote wildlife monitoring for adaptive management Amphibian Research and Monitoring Initiative More... Filters Date Range Past year (19) Past month (19) Past week (13) Past day (0) Custom range... To   Search Types Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Contacts U.S. Geological Survey Alaska Science Center Ecosystems Sonsthagen, Sarah A. (ORCID: 0000-0001-6215-5874) Esslinger, George G. (ORCID: 0000-0002-3459-0083) More... Categories Data (19) Data Release - Revised (5) Tag Types Theme (19) Place (19) USGS Scientific Topic Keyword (19) Harvest Set (19) Tag Schemes None (17) USGS Thesaurus (18) USGS Geographic Names Information System (GNIS) (16) USGS CSA Biocomplexity Thesaurus (17) NASA GCMD Earth Science Keyword Thesaurus (16) MeSH-National Library of Medicine (7) ISO 19115 Topic Category (18) More... View Results as: JSON ATOM CSV Browse Folder

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 Arthropod Abundance Data from the Colville River Delta, Alaska This data release contains information on the seasonal diversity and abundance of arthropods collected at the Colville River Delta, Alaska, 2011-2012 and 2014-2107. Researchers with the US Geological Survey began studying the reproductive ecology of birds at a site on the Colville River near the Beaufort Sea coast in 2011. Researchers concurrently collected arthropods at 3-day intervals to understand the relationship between the seasonal abundance of arthropods and the reproductive output of insectivorous birds. Categories: Data; Tags: Alaska, Animals/Invertebrates, Arachnida, Arctic Coastal Plain, Arthropods, All tags... Bioenergetics, Biota, Collembola, Colville River Delta, Ecology, Environment, Insecta, Insects, Insects, Invertebrates, Terrestrial ecosystems, Tundra ecosystems, USGS Science Data Catalog (SDC), Wetland ecosystems, Wildlife Biology, Wildlife food habits, Fewer tags Intertidal and Subtidal Sea Otter Prey Sampling in Mixed Sediment Habitat in Glacier Bay National Park and Preserve, Alaska, 1998 to 2011 This dataset provides clam species abundance and size data from intertidal and subtidal mixed sediment habitats in Glacier Bay National Park and Preserve (GBNPP). Data are provided for all observed clams, horse mussels, or urchins 14 mm or larger. Sampling involved excavating 25 cm of substrate from quadrats (approximately 0.25 sq meter) along transects at random and selected sites, 10 quadrats at the 0 Mean Lower Low Water (MLLW) tide level for intertidal sampling and 20 quadrats at approximately 9 m depth for subtidal sampling. Site and taxonomic information are provided. Abundance and size data are provided in two tables with different data configurations: (1) a compact version with data for those species observed... Categories: Data, Data Release - Revised; Tags: Alaska, Animal and plant census, Aquatic Biology, Aquatic biology, Benthic habitat, All tags... Benthos, Biota, Bivalves, Clam, Coastal ecosystems, Ecology, Environment, Glacier Bay National Park and Preserve, Macroinvertebrates, Marine ecosystems, Mollusks, Mollusks, Sea urchin, Trophic relationships, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Bioenergetics and Morphology of Mussels (Mytilus trossulus) in Kenai Fjords National Park This dataset provides one table of bioenergetic and morphological measurements of Pacific blue mussels (Mytilus trossulus; N = 444) collected at three intertidal sites in Kenai Fjords National Park, Alaska. Mussels were collected at the same tidal height across all three sites on a nearly monthly basis from 2014-2015. Categories: Data; Tags: Aialik Bay, Alaska, Animal morphology, Animals/Invertebrates, Aquatic Biology, All tags... Bioenergetics, Biomass dynamics, Biota, Bivalves, Calorimetry, Coastal ecosystems, Ecology, Environment, Gulf of Alaska, Intertidal environments, Kenai Fjords National Park, Macroinvertebrates, Marine ecosystems, Mollusks, Resurrection Bay, Shellfish, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Gulf Watch Alaska, Nearshore Monitoring Component: Sea Otter Foraging Observations from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park, 2012-2016 This data is part of the Gulf Watch Alaska (GWA) long term monitoring program, benthic monitoring component and a seasonal diet study in Kenai Fjords National Park. The dataset is a comma separated file exported from a Microsoft Access database. The data consists of observations made of foraging sea otters (Enhydra lutris). Observers used Questar field model spotting scopes and binoculars to identify prey. Date, local time, dive duration, success, prey type, prey size, prey number, handling time and surface time are all recorded. Sites are in Alaska and include locations in Katmai National Park and Preserve, Kenai Fjords National Park and Prince William Sound. This data in this file were collected 2012-2016. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, Ecology, Enhydra lutris, Gulf of Alaska, Katmai National Park and Preserve, All tags... Kenai Fjords National Park, Prince William Sound, USGS Science Data Catalog (SDC), Wildlife Biology, biota, coastal ecosystems, environment, foraging behavior, marine ecology, monitoring, prey, sea otters, synecology, Fewer tags Blood Parasite Infection Data from Northwestern Crows (Corvus caurinus), Alaska, 2007-2008 This data set consists of two tables associated with a study of Haemosporidian parasite infection in Northwestern Crows (Corvus caurinus) sampled at six locations throughout southcentral and southeast Alaska in 2007-2008. The first table contains species, location, banding, and morphometric data for all samples. The second table contains results from heamosporidian parasite screening of crow blood samples using molecular techniques. Genomic DNA was extracted from blood samples and screened for the presence of Haemoproteus, Plasmodium, and Leucocytozoon blood parasites using a nested-PCR method. Parasite genetic data is provided as GenBank accession numbers for any samples that tested positive for haemosporidian... Categories: Data; Tags: Alaska, Animals/Vertebrates, Avian physiology, Biological science disciplines, Biology, All tags... Biosphere, Biota, Birds, Birds, Blood parasites, DNA Sequencing, Disease, Disease vectors, Ecological dynamics, Ecology, Environment, Genetic diversity, Genetic variance, Genetics, Genetics, Genetics, Haemosporidians, Haines, Hematozoa, Homer, Juneau, Kenai, Life sciences, Natural science disciplines, Parasitic diseases, Parasitism, Parasitology, Parasitology, Pathologic processes, Perching birds, Polymerase chain reaction, Sciences, Seward, Species/Population interactions, USGS Science Data Catalog (SDC), Valdez, Vector borne diseases, Wildlife Biology, Wildlife Disease, Wildlife biology, Zoology, Fewer tags Greater White-Fronted Goose Genetic Data, Circumpolar, 1988-2009 This data set describes nuclear microsatellite genotypes derived from eight autosomal loci (BCA6, BCA9, BCA11, BCA5, CRG, OXY13, TSP1.20.09 and TSP1.20.46) and a 366 base pair portion of the mitochondrial control region. A total of 665 Greater White-fronted Geese were examined by genotyping and 518 by sequencing with samples coming from its circumpolar range representing multiple flyways (Midcontinent, Pacific, Greenland, Palearctic). The sex of most samples was determined in the field by morphology or cloacal examination. Version History: First release: June 2018 Revised: July 2018 (ver. 2.0) Categories: Data, Data Release - Revised; Tags: Alaska, Alleles, Anadyr, Anderson River, Animals/vertebrates, All tags... Anser albifrons, Biota, Birds, Bristol Bay, Brooks Range, Colville River, Cook Inlet, DNA, Ducks/Geese/Swans, Environment, Gene Flow, Genetic Markers, Genetic Variance, Genetics, Genetics, Genotype, Greater White-Fronted Goose, Greenland, Innoko National Wildlife Refuge, Ireland, Kanuti National Wildife Refuge, Kava, Kent Peninsula, Kolyma, Koyukuk National Wildlife Refuge, Kuparuk River, Kuskokwim River, Lena, MacKenzie River, Microsatellite Repeats, Molecular biology, North Slope, Northwest Territories, Nunavut, Old Crow Flats, Point Lay, Polymerase chain reaction, Population differentiation, Population genetics, Queen Maud Gulf, Rasmussen Basin, Selawik National Wildlife Refuge, Speciation (biological), Taimyr, Terrestrial Ecosystems, Terrestrial ecosystems, USGS Science Data Catalog (SDC), Vaygach, Victoria Island, Wildlife, Wildlife Biology, Yana, Yukon, Yukon River, Yukon–Kuskokwim Delta, Fewer tags DNA Microsatellite and Sex Identification Marker Screening for Mexican Spotted Owl (Strix occidentalis lucida) Two tables of data are included in this data release. The first table provides screening results for 32 previously described and/or published microsatellites and 1 sexing marker, primer redesigns for use in Mexican Spotted Owls in this data release, and size of markers in Mexican Spotted Owls. The second table provides microsatellite and sexing marker results for 10 tissue and 98 feather samples for 11 microsatellite markers identified as variable in initial marker screenings. Categories: Data; Tags: Alleles, Animals/Vertebrates, Apache-Sitgreaves National Forest, Arizona, Biota, All tags... Birds, Birds of prey, Breeding sites, Capture-recapture studies, Coconino National Forest, DNA, DNA Primers, Environment, Genetic diversity, Genetic markers, Genetics, Genetics, Genotype, Grand Canyon National Park, Kaibab National Forest, Los Alamos, Mexican Spotted Owl, Microsatellite Repeats, New Mexico, Polymerase chain reaction, Raptors, Sexing (plants & animals), Strix occidentalis lucida, Terrestrial ecosystems, Threatened species, Tonto National Forest, USGS Science Data Catalog (SDC), Walnut Canyon National Monument, Wildlife, Wildlife Biology, Fewer tags Genetic Microsatellite Data from Sorex, Based on Holarctic Sampling This data set describes nuclear microsatellite genotypes derived from 17 autosomal loci (Sug001, Sug002, Sug003, Sug006, Sug007, Sug008, Sug009, Sug010, Sug011, Sug012, Sug019, Sug021, Sug022, Sug023, Sug024, Sug029, Sug038) in shrews, Sorex spp. Categories: Data; Tags: Alaska, Alleles, Anadyr, Animals/Vertebrates, Biota, All tags... Chukotka, DNA, Environment, Gene Flow, Genetic diversity, Genetic markers, Genetics, Genetics, Genotype, Insectivora, Kamchatka Peninsula, Mammals, Microsatellite repeats, Polymerase chain reaction, Pribilof Islands, Russia, Shrews, Sorex camtschatica, Sorex cinereus, Sorex jacksoni, Sorex portenkoi, Sorex pribilofensis, Sorex ugyunak, Terrestrial ecosystems, Tundra ecosystems, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Genomic Data from Ptarmigan and Grouse, Alaska This data set provides sample data and NCBI accession information for genomic sequencing of ptarmigan and grouse from Alaska. Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Vertebrates, Biota, Birds, Bonasa umbellus, All tags... DNA sequencing, Dendragapus fuliginosus, Environment, Falcipennis canadensis, Fowl, Galliformes, Genetic diversity, Genetics, Genomics, Herbivores, Lagopus lagopus, Lagopus leucura, Lagopus muta, Population Genetics, Rock ptarmigan, Ruffed grouse, Sharp-tailed grouse, Sooty grouse, Spruce grouse, Terrestrial ecosystems, Transcriptome, Tundra ecosystems, Tympanuchus phasianellus, USGS Science Data Catalog (SDC), Upland game birds, White-tailed ptarmigan, Wildlife, Wildlife Biology, Willow ptarmigan, ddrad, double digestion restriction associated DNA, exon capture, whole genome, whole methylome, whole mitogenome, whole transcriptome, Fewer tags Larus Gull Microsatellite DNA Data, 2006-2009 This data set describes nuclear microsatellite genotypes derived from eleven autosomal loci (Lar24, Lar12, Lar26, Lar19, Rbg13, K16, Rbg18, Hg18, Hg16, Hg25, Rbg29). A total of 651 Larus gulls were examined for this study with samples collected throughout North America, Europe, Russia, and South America. Categories: Data; Tags: Alaska, Alleles, Animals/Vertebrates, Biodiversity, Biota, All tags... Birds, Coastal ecosystems, DNA, DNA sequencing, Environment, Europe, Evolution, Gene Flow, Genetic Markers, Genetic diversity, Genetic variance, Genetics, Genetics, Genotype, Microsatellite Repeats, Polymerase chain reaction, Population Genetics, Russia, South America, Systematics and taxonomy, USGS Science Data Catalog (SDC), Waders/Gulls/Auks and Allies, Wildlife, Wildlife Biology, Fewer tags DNA Microsatellite Markers for Northern Fulmar (Fulmaris glacialis) and Cross-species Amplification in Select Seabird Species This data set is comprised of one table with sampling information and allele sizes for 69 individual Northern Fulmars (Fulmarus glacialis) from Chagulak Island, Alaska and Hafnarey Island, Iceland. Fulmar allele sizes are provided for 10 previously published and 26 novel microsatellite loci. Additionally, allele sizes for the 26 microsatellite loci developed in this study are included for Arctic Terns (Sterna paradisaea, n=4), Common Murres (Uria aalge, n=6), Crested Auklets (Aethia cristatella, n=6), Fork-tailed Storm Petrels (Oceanodroma furcata, n=5), Marbled Murrelets (Brachyramphus marmoratus, n=5), Common Gulls (Larus canus, n=5), Pelagic cormorants (Phalacrocorax pelagicus, n=5), and Thick-billed Murres (Uria... Categories: Data; Tags: Alaska, Albatrosses/Petrels and Allies, Alleles, Animals, Animals/Vertebrates, All tags... Arctic Regions, Biota, Birds, Birds, Birds, Charadriiformes, DNA sequencing, Environment, Fulmarus glacialis, Genetic diversity, Genetic variance, Genetics, Genetics, Genetics, Population, Iceland, Life Sciences, Microsatellite Repeats, Northern fulmar, Polymerase chain reaction, Population genetics, Systematics and taxonomy, USGS Science Data Catalog (SDC), Waders/Gulls/Auks and Allies, Wildlife Biology, Fewer tags Gulf Watch Alaska, Benthic Monitoring Component: Sea Otter Aerial Survey Data Kenai Fjords National Park, 2002-2016 These data are is 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 Kenai Fjords National Park between 2002 and 2016. 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 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 of 91m over pre-determined transects while an... Categories: Data; 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, Kenai Fjords National Park, Marine environment monitoring, Marine mammals, Otters, Population dynamics, Sea otters, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Spectacled Eider (Somateria fischeri) Microsatellite and Mitochondrial DNA Data, 2014-2018, Alaska and Russia. This data set describes nuclear microsatellite genotypes derived from ten autosomal loci (Aph8, Aph16, Cmo7, Cmo9, Hhi5, Sfi10, Smo4, Smo6, Smo8, Smo12) and nucleotide sequence data derived from one mitochondrial DNA locus (control region). A total of 262 Spectacled Eiders were examined for this study. Samples were collected at Indigirka and Chaun River Deltas, Russia, and Yukon-Kuskokwim Delta, Utqiagvik, Colville River Delta, Prudhoe Bay, Alaska. Samples used in the study originated from blood or feather samples collected in the field from live trapped birds or from tissue taken from dead birds. Categories: Data; Tags: Alaska, Alaska, Alleles, Animals/Vertebrates, Arctic Regions, All tags... Biota, Birds, Birds, Canada, Chaun, Chaun River Delta, Colville River Delta, DNA, DNA sequencing, DNA, Mitochondrial, Ecological Processes, Environment, Evolution, Genetic diversity, Genetic markers, Genetic variance, Genetics, Genetics, Genetics, Population, Indigirka, Indigirka River Delta, Life Sciences, Microsatellite Repeats, North America, Polymerase chain reaction, Population genetic, Prudhoe Bay, Russia, Somateria fischeri, Spectacled eider, Systematics and taxonomy, USGS Science Data Catalog (SDC), Utqiagvik, Waterfowl, Wildlife Biology, Yukon-Kuskokwim Delta, Fewer tags Hawaiian Coot (Fulica alai) and Hawaiian Gallinule (Gallinula galeata sandvicensis) Microsatellite and Mitochondrial DNA Data, 2014-2016, Oahu, Kauai, and Molokai, Hawaii This data set describes nuclear microsatellite genotypes derived from twenty-one autosomal loci (Fal02, Fal04, Fal07, Fal08, Fal10, Fal12, Fal14-1, Fal16, Fal 17, Fal19, Gch03, Gch06, Gch07, Gch12, Gch13, Gch14, Gch17, Gch19, Pho110, KiRa9-1, and KiRa10) and nucleotide sequence data derived from two mitochondrial DNA loci (control region and NADH dehydrogenase 2). Samples were collected on Oahu, Kauai, Molokai, Hawaii, United States of America. Samples used in the study originated from blood or feather samples collected in the field from live trapped birds or from tissue taken from dead birds or museum specimens according to each institution's load policies and procedures. We compared historical (samples collected... Categories: Data, Data Release - Revised; Tags: Alleles, Animals/Vertebrates, Biota, Birds, Common Gallinule, All tags... Cranes and Allies, DNA sequencing, DNA, Mitochondrial, Environment, Evolution, Genetic diversity, Genetic diversity, Genetic markers, Genetic variance, Genetics, Genotype, Hawaii, Hawaiian Common Gallinule, Hawaiian Coot, Hawaiian Gallinule, Kauai, Microsatellite repeats, Molokai, Oahu, Polymerase chain reaction, Population genetic, Terrestrial ecosystems, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Sea Otter Gene Transcription Data from Kodiak, the Alaska Peninsula, and Prince William Sound, Alaska, 2005-2012 This data set includes capture location, date, sex, and results of molecular gene transcription analysis for sea otters (Enhydra lutris) sampled in western Prince William Sound (WPWS), Alaska and comparison samples collected from Kodiak and the Alaska Peninsula, and reference samples collected from captive animals. Samples were collected between 2005 and 2012. Molecular gene transcription is the process by which information from the DNA template of a particular gene is transcribed into messenger RNA (mRNA) and eventually translated into a functional protein. The amount of mRNA transcribed from a particular gene is physiologically dictated. Altered levels of gene transcripts provide observable signs of health impairment. Categories: Data; Tags: Adak Island, Alaska, Alaska Peninsula, Animals/Vertebrates, Aquatic Biology, All tags... Biomarker, Biota, EVOS, Ecology, Ecosystem monitoring, Ecotoxicology, Environment, Environmental Health, Exxon Valdez Oil Spill, Gene transcription, Katmai National Park and Preserve, Knight Island, Kodiak Island, Mammals, Marine ecosystems, Montague Island, Oil exposure, Otters, Population recovery, Prince William Sound, USGS Science Data Catalog (SDC), Water Quality, Wildlife, Wildlife Biology, Fewer tags Harlequin Duck Capture and EROD Activity Data from Prince William Sound, Alaska, 2011, 2013, 2014 This data set includes capture information and ethoxyresorufin­O­deethylase (EROD) activity results for harlequin ducks sampled during March 2011, 2013, and 2014 in western Prince William Sound, Alaska. Categories: Data; Tags: Alaska, Animals/Vertebrates, Aquatic Biology, Aquatic ecosystems, Benthic habitat, All tags... Biomarkers, Biota, Birds, Capture, Coastal habitat, Cytochrome p4501A, Ecology, Ecology, Ecology, Ecosystem monitoring, Environment, Environmental Health, Exxon Valdez Oil Spill, Harlequin duck, Histrionicus histrionicus, Intertidal environments, Marine environment monitoring, Oil exposure, Population recovery, Prince William Sound, USGS Science Data Catalog (SDC), Water Quality, Wildlife Biology, Fewer tags Polar Bear Microsatellite Data Southern Beaufort Sea 2010-2013 This data set provides Polar Bear microsatellite genotypes derived from twenty loci (G1A, G10B, G10C, CXX110, G1D, G10H, G10J, G10L, G10M, MSUT2, MU59, G10P, 145P07, CPH9, CXX20, MU50, MU51, G10X, CXX173, G10U). Samples for microsatellite genetic analysis were collected from polar bears from the southern Beaufort Sea during the spring and fall, 2010-2013. Tissue samples were collected from captured bears, biopsy darts, and barbed-wire hair-snags. Genetic identification of individuals was used to determine and compare the relatedness of bears that used land during summer and fall to those bears that remained on the sea ice. Categories: Data; Tags: 145P07, Alaska, Alleles, Animals/Vertebrates, Arctic Regions, All tags... Bears, Beaufort Sea, Biota, CPH9, CXX110, CXX173, CXX20, Carnivores, DNA, DNA sequencing, DNA, Mitochondrial, Ecological Processes, Environment, Evolution, G10B, G10C, G10H, G10J, G10L, G10M, G10P, G10U, G10X, G1A, G1D, Genetic diversity, Genetic markers, Genetic variance, Genetics, Genetics, Genetics, Population, MSUT2, MU50, MU51, MU59, Mammals, Mammals, Microsatellite Repeats, Microsatellite loci, Polymerase chain reaction, Population genetic, Systematics and taxonomy, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Carbon Isotopes, Total Organic Carbon, Programmed Pyrolysis, Volcanic Zircon U-Pb, and Geochemistry Data from the Hue Shale, Arctic Alaska - 2024 This dataset contains results from a stratigraphic section of the Hue Shale located along the Jago River in the Arctic National Wildlife Refuge at 69.9099, -143.3947 (WGS84). Sample heights were measured with a tape measure in a continuous succession. Zircon grains from volcanic ashes were analyzed via laser ablation at either the University of California, Santa Barbara (UCSB) or the University of Arizona Laserchron Center (ALC) using a Photon Machines Analyte 193-nm Excimer laser and Nu Instruments Plasma HR MC-ICPMS. Zircon grains from volcanic ashes were analyzed via chemical abrasion at the Berkeley Geochronology Center using a Sector 54 TIMS. Bulk mudstone samples were subject to a variety of analyses. Total... Categories: Data; Tags: Alaska, Atomic emission spectroscopy, Brooks Range, Carbon isotope analysis, Energy Resources, All tags... GeoScientificInformation, Geochemistry, Geochemistry, Geochronology, Geology, Isotopic analysis, Mass spectroscopy, North Slope, Ocean/lake records, Paleoclimate, Radiometric dating, Stratigraphic sequence, U-Pb, USGS Science Data Catalog (SDC), Uranium-lead analysis, Volcanic zircon, Fewer tags