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Argon geochronology data for eastern Bhutan This dataset accompanies publication 'The influence of foreland structures on hinterland cooling: evaluating the drivers of exhumation in the eastern Bhutan Himalaya'. The Ar/Ar data provides time constraints for the cooling of rocks in the study area. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: 40Ar/39Ar, Argon Geochronology Laboratory, Bhutan, GGGSC, Geochemistry, All tags... Geology, Geophysics, and Geochemistry Science Center, MRP, Mineral Resources Program, Structural Geology, USGS Science Data Catalog (SDC), geochronology, geoscientificInformation, mass spectroscopy, radiometric dating, Fewer tags Corescan© Hyperspectral Core Imager, Mark III system data collected for the characterization of mineral resources near Nabesna, Alaska, 2014-2016 Corescan© Hyperspectral Core Imager Mark III (HCI-III) system data were acquired for hand samples, and subsequent billets made from the hand samples, collected during the U.S. Geological Survey (USGS) 2014, 2015, and 2016 field seasons in the Nabesna area of the eastern Alaska Range. This area contains exposed porphyry deposits and hand samples were collected throughout the region in support of the HyMap imaging spectrometer survey (https://doi.org/10.5066/F7DN435W) (Kokaly and others, 2017a). The HCI-III system consists of three different components. The first is an imaging spectrometer which collects reflectance data with a spatial resolution of approximately 500 nanometers (nm) for 514 spectral channels covering... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Alaska, Alaska, Alaska Range, Bond Creek, Canada, All tags... ENVI, Environment for Visualizing Images, GGGSC, Geology, Geophysics, and Geochemistry Science Center, MRP, Mineral Resources Program, Nabesna, Nabesna A-2 quadrangle, Nabesna A-4 quadrangle, Nabesna B-4 quadrangle, Nikonda Creek, Nutzotin Mountains, Orange Hill, SWIR, USGS Science Data Catalog (SDC), VNIR, Valdez-Cordova County, Wrangell Mountains, Wrangell–Saint Elias National Preserve, Yukon Territory, economy, geoscientificInformation, hyperspectral imaging, imaging spectroscopy, infrared imaging, mineral resources, mineralogy, remote sensing, shortwave infrared, spectroscopy, visible-near infrared, Fewer tags Audiomagnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2018 This data release includes audiomagnetotelluric (AMT) sounding data collected in July 2018 in the Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field, by the U.S. Geological Survey (USGS). Along with geologic mapping, airborne magnetics, airborne electromagnetics, and magnetotellurics, the USGS collected AMT data at 24 sites along four profiles ranging from 3 to 6 kilometers in length across the north-western structural margin of the Silverton caldera in Mineral Basin (MB01-MB05), across the south-eastern margin of the caldera along Cunningham Creek (CC01-CC05), within the caldera in Eureka Graben (EG01-EG05), and within the caldera along upper Cement Creek near the Gold King mine... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: "San Juan" County, AMT, Colorado, Environmental Health, GGGSC, All tags... GPS measurement, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Hydrogeology, MRP, MT, Mineral Resources Program, Mineralogy, Silverton, USGS Science Data Catalog (SDC), Volcanology, Water Quality, apparent resistivity, audiomagnetotelluric, economy, electric field (earth), geophysics, impedance, impedance phase, impedance strike, magnetic field (earth), magnetotelluric, magnetotelluric surveying, sounding, tipper, Fewer tags Airborne electromagnetic and magnetic survey data, Iliamna Volcano, Alaska, June 2012 Airborne electromagnetic (AEM) and magnetic survey data were collected during June 2012 along 556 line-kilometers over Iliamna Volcano, Alaska. These data were collected in support of alteration and volcano flank instability mapping as part of the U.S. Geological Survey (USGS) Volcano Hazards Program. Data were acquired by SkyTEM Survey ApS SkyTEM304 system with the Soloy Helicopters Eurocopter Astar 350 B3 and Bell 407 dual-moment, time-domain helicopter-borne electromagnetic system together with a Geometrics G822A cesium vapor magnetometer with Kroum KMAG4 counter. The survey was flown at a nominal flight height of 30 meters (m) above terrain along block-style lines with a nominal spacing of 250 m. The survey... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Alaska, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Iliamna Volcano, Kenai Peninsula, All tags... MRP, Mineral Resources Program, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), USGS Volcano Hazards Program, aeromagnetic surveying, electromagnetic surveying, geophysics, geoscientificInformation, geospatial datasets, hazards, landslides, resistivity, volcanology, Fewer tags Grain size, mineralogic, and trace-element data from field samples near Hinkley, California This data release is part of a study examining the occurrence of chromium and natural and anthropogenic hexavalent Chromium, Cr(VI) in groundwater. Data will be used to estimate naturally-occurring background Cr(VI) concentrations upgradient, near the plume margins, and downgradient from a mapped Cr(VI) contamination plume near Hinkley, CA (Izbicki and Groover, 2016). The data release includes grain size distribution, photographic, and associated chemical and mineral analysis data for 36 sediment core and alluvium samples as well as Scanning Electron Microscopy analysis on select grains from magnetic and heavy mineral separates collected near Hinkley, CA. The cooperator for this study is the Lahontan Regional... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Environmental Health, Geochemistry, Hinkley, USGS Science Data Catalog (SDC), All tags... Water Resources, atomic emission spectroscopy, background level, chemical analysis, chromium, contamination and pollution, geochemistry, geoscientificInformation, groundwater, health, mass spectroscopy, rocks and deposits, scanning electron microscopy, soil chemistry, unconsolidated deposits, x-ray fluorescence, Fewer tags Airborne magnetic survey over northeast North Dakota, 2000-2001 This data release is a re-release of an airborne geophysical survey carried out for the United States Geological Survey (USGS) by Spectra Exploration Geoscience Corp., from November 2000 to February 2001. The purpose of this survey was to acquire high-resolution, high-sensitivity aeromagnetic data over an area in northeast and north-central North Dakota and assess the area for anomalies and magnetic features pertaining to the local geology. To achieve this purpose, the survey area was systematically traversed by an aircraft carrying geophysical instruments along parallel flight lines (traverses) spaced 0.25 miles (400 meters) apart in an east-west alignment. Tie lines were flown normal to the traverses spaced at... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, Raster, Shapefile; Tags: <1GB, Cavalier County, Earth Mapping Resources Initiative, EarthMRI, Geology, Geophysics, and Geochemistry Science CenterGGGSC, All tags... MRP, Mineral Resources Program, North Dakota, Pembina County, Ramsey County, Spectra Exploration Geoscience Corperation, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), United States, United States of America, Walsh County, aeromagnetic surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, horizontal magnetic gradiometry, magnetic field (earth), vertical magnetic gradient, Fewer tags Quetrupillán Volcanic Complex, southern Chile: Argon age data and Pb, Sr, and Nd isotopic data This dataset accompanies planned publication 'Lava-ice interactions at late Pleistocene trachyte-basaltic andesite fissure eruptions, Quetrupillán Volcanic Complex (39°30′ S, 71°43′ W), southern Chile', as well as planned future publications on this volcanic complex. The Ar/Ar data and the Pb, Sr, and Nd data are for basalt and trachyte lava flows at Quetrupillán volcano. The Ar geochronology and isotope geochemistry will aid in the understanding of the timing of eruptive activity and glacial damming of lava flows, and magma source compositions studied in the planned publications. Samples were collected from Quetrupillán volcano by Dave McGarvie (Univ. of Lancaster, UK) and Isla Simmons (Univ. of Edinburgh, UK),... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: 40Ar/39Ar, Andes, Argon Geochronology Laboratory, Chile, Geology, Geophysics, and Geochemistry Science Center, All tags... Laguna Azul, Mineral Resources Program, Nd, Pb, Quetrupillán, Sr, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), basalt, geochronology, geoscientificInformation, mass spectrometry, radiometric dating, trachyte, Fewer tags Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, November 2018 - February 2019 Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired November 2018 to February 2019 along 16,816 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP). Data were acquired by CGG Canada Services, Ltd. with three different helicopter-borne sensors: the CGG Canada Services, Ltd. Resolve frequency-domain AEM instrument that is used to map subsurface geologic structure at depths up to 100 meters, depending on the subsurface resistivity; a Scintrex CS-3 cesium vapor magnetometer that detects changes in deep (hundreds of meters to kilometers) geologic structure based on variations in the magnetic properties of different formations; and a Radiation Solutions RS-500 spectrometer that... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arkansas, Bayou Bartholomew, Bayou Meto, Boeuf River, Cache River, All tags... Coldwater River, Crowley's Ridge, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Hydrology, Illinois, L'Anguille River, Louisiana, MRVA, Mississippi, Mississippi Alluvial Plain, Mississippi River, Mississippi River Valley Alluvial aquifer, Missouri, Saint Francis River, Tallahatchie River, Tennessee, USGS Science Data Catalog (SDC), WAUSP, Water Availability and Use Science Program, Water Resources, Yazoo River, aeromagnetic surveying, aeroradiometric surveying, electromagnetic surveying, electromagnetics, engineering sciences, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, magnetic field, magnetics, radiometrics, resistivity, water resources, Fewer tags Surface electrical resistivity tomography, magnetic, and gravity surveys in Redwell Basin and the greater East River watershed near Crested Butte, Colorado, 2017 Surface electrical resistivity tomography (ERT), time-domain electromagnetics (TEM), nuclear magnetic resonance (NMR), magnetics, and gravity data were acquired in 2016, 2017 and 2018 in the greater East River Watershed near Crested Butte Colorado with a focused effort in Redwell Basin. Five ERT profiles were acquired within Redwell Basin and Brush Creek to map geologic structure at depths up to 40 meters, depending on the subsurface resistivity, using the Advanced Geosciences, Inc. SuperSting R8 resistivity meter. Approximately ten kilometers of total field magnetics data were acquired with a Geometrics G-858 cesium vapor magnetometer that detects changes in deep (tens of meters to kilometers) geologic structure... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Brush Creek, Colorado, Crested Butte, East River, Environmental Health, All tags... GGGSC, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Gothic, Gunnison County, Hydrology, MRP, Mineral Resources, Mineral Resources Program, Mount Emmons, Oh-be-joyful, Redwell Basin, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Water Resources, bouguer anomaly, electrical resistivity tomography, environment, free-air anomaly, geophysics, geoscientificInformation, geospatial datasets, gravimeter measurement, gravitational field (earth), gravity, groundwater, hydrogeology, magnetic anomaly maps, magnetic field, magnetic surveying, magnetics, resistivity, water resources, Fewer tags Self-potential (SP) data Surface electrical resistivity tomography (ERT), electromagnetic induction (EMI), and self-potential (SP) data were acquired March 9 - 20, 2018 by the U.S. Geological Survey, in collaboration with the U.S. Army Corps of Engineers, at the Jim Woodruff Lock and Dam near Chattahoochee, Florida. Self-potential (SP) data were acquired at 384 unique stations with Borin Stelth 3 copper-copper sulfate porous-pot electrodes and Keysight U1253B high-impedance multimeter to identify variations in subsurface hydrologic flow. This data release includes the raw and processed self-potential data. They are provided as digital data, and data fields are defined in the data dictionary. Jim Woodruff Lock and Dam is located... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Apalachicola River, Chattahoochee, Chattahoochee River, Decatur County, ERT surveying, All tags... Flint River, Florida, GGGSC, Gadsden County, Geology, Geophysics, and Geochemistry Science Center, Georgia, Jackson County, Jim Woodruff Lock and Dam, Lake Seminole, Polk Lake, Suwannee Limestone, Tampa Limestone, U.S. Geological Survey, USGS, Upper Floridan Aquifer, dam, electrical resistivity imaging, electrical resistivity tomography, electromagnetic induction, electromagnetic surveying, electromagnetics, engineering sciences, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, karst, resistivity, self-potential, sinkhole formation, spontaneous-potential, surface water (non-marine), water resources, Fewer tags Magnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2018 This data release includes magnetotelluric (MT) sounding data collected in July 2018 in the Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field, by the U.S. Geological Survey (USGS). Along with geologic mapping, airborne magnetics, airborne electromagnetics, and audiomagnetotellurics, the USGS collected MT data at 22 sites along four profiles ranging from 3 to 6 kilometers in length across the north-western structural margin of the Silverton caldera in Mineral Basin (MB01-MB05), across the south-eastern margin of the caldera along Cunningham Creek (CC01-CC05), within the caldera in Eureka Graben (EG01-EG05), and within the caldera along upper Cement Creek near the Gold King mine (GK01-GK09). Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Animas River, Arrastra Gulch, Colorado, Eureka Graben, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, GeoscientificInformation, Kendall Mountain, MRP, MT, Mineral Resources Program, Ouray County, Red Mountain, San Juan County, Silverton, South Fork Mineral Creek, Southern Rocky Mountains, Southern Rocky Mountains Volcanic Field, USGS Science Data Catalog (SDC), USGS:6019ca77d34edf5c66f0d786, abandoned mines and quarries, apparent resistivity, electric field (earth), electromagnetic surveying, electromagnetic surveying, geophysics, hydrothermal processes, impedance, magnetic field (earth), magnetic field (earth), magnetotelluric surveying, magnetotellurics, mineral resources, phase, time series, water quality, Fewer tags Geochemical data for the Elk Creek alkaline complex, southeast Nebraska This U.S. Geological Survey (USGS) data release contains analytical data from a suite of rock and mineral samples collected from drill core within the Elk Creek alkaline complex, southeast Nebraska. This complex hosts the Elk Creek carbonatite, a multilithologic carbonatite enriched in niobium, rare earth elements (REEs), scandium, and titanium. Mineralized carbonatites are the world’s primary source of rare earth elements (REEs) and niobium, but only a few deposits are responsible for meeting the current demand of these critical elements such that there is increasing interest in other carbonatites that have the potential to help meet future demands. This study focuses on the Elk Creek carbonatite, the largest... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Economic Geology, Elk Creek, Elk Creek carbonatite, Geochemistry, Johnson County, All tags... Mineral Resources, Nebraska, Pawnee County, USGS Science Data Catalog (SDC), carbonatite, economic geology, geochemistry, geology, mineral resources, niobium, rare earth elements, Fewer tags Geochemical Data Release for Gospel-Hump Wilderness Area, Magruder Corridor and Special Mining Management Zone Additions to the Frank Church River of No Return Wilderness Area, and adjacent areas Idaho and Montana The data release for Gospel-Hump Wilderness Area and the Magruder Corridor and Special Mining Management Zone Additions to the Frank Church River of No Return Wilderness Area, and adjacent areas Idaho and Montana, contains a subset of previously unpublished geochemical data from the 1979-1984 projects. In the case of Gospel-Hump Wilderness Area study (Lund and Esparza, 1990), the purpose of the project was to determine petrologic and geochemical characteristics and to investigate effects of historic mine drainage in the study area. Data for the Magruder Corridor Addition reflect rock geochemistry to document petrologic and geochemical characteristics (Mosier and others, 1981; Lund and others, 1992). Included in... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bitterroot National Forest, C1 fraction heavy-mineral concentrate, C3 fraction heavy-mineral concentrate, C4 fraction heavy-mineral concentrate, Environmental Health, All tags... Geochemistry, Gospel-Hump Wilderness Area, Idaho, Idaho County, Lemhi County, Montana, NGDB, National Geochemical Database, Nez Perce-Clearwater National Forest, Payette National Forest, Ravalli County, Salmon National Forest, USA, USGS Science Data Catalog (SDC), United States of America, Valley County, environmental geochemistry, exploration geochemistry, geochemical data, geochemistry, mine drainage, petrology, rock chemistry, stream sediment, Fewer tags Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, Mississippi Embayment, and Gulf Coastal Plain, September 2021 - January 2022 Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired September 2021 to January 2022 along 27,204 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP), Mississippi Embayment, and Gulf Coastal Plain. Data were acquired by Xcalibur Multiphysics (Canada), Ltd. with three different airborne sensors: the 30Hz TEMPEST time-domain AEM instrument that is used to map subsurface geologic structure at depths up to 300 meters (m) depending on the subsurface resistivity; a Scintrex CS-3 cesium vapor magnetometer that detects changes in deep (hundreds of meters to kilometers) geologic structure based on variations in the magnetic properties of different formations; and a Radiation Solutions... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arkansas, Arkansas River, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Illinois, All tags... Louisiana, MRVA, Mississippi, Mississippi Alluvial Plain, Mississippi River, Mississippi River Valley Alluvial aquifer, Missouri, New Madrid Seismic Zone, Shellmound, Tennessee, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), WAUSP, Water Availability and Use Science Program, ["Geophysics"], aeromagnetic surveying, aeroradiometric surveying, electromagnetic surveying, electromagnetics, engineering sciences, environment, geologic structure, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, hydrology, magnetic field, magnetics, potassium, radiometrics, resistivity, thorium, uranium, water resources, Fewer tags Carbonatite whole-rock and calcite geochemistry from the Bear Lodge alkaline complex, Wyoming and Mountain Pass mine, California Whole-rock and calcite geochemical data are reported for twelve carbonatite samples collected from the Bear Lodge alkaline complex, Wyoming and from the Mountain Pass mine, California. Calcite geochemical data was collected using electron microprobe and laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) analyses. Reported whole-rock data was measured by inductively coupled plasma-optical emission spectrometry (ICP-OES), inductively coupled plasma-mass spectrometry (ICP-MS), ion selective electrode-fluoride (ISE-F), and wavelength dispersive X-ray fluorescence (WDXRF). Geochemical data are presented in downloadable .csv files. Spatial data of sample collection sites are provided as polygons in... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bear Lodge Mountains, Black Hills, California, California, Carbonatite, All tags... Crook County, Economic Geology, GGGSC, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, ICP-MS, ICP-OES, ISE-F, Inductively coupled plasma-mass spectrometry, Inductively coupled plasma-optical emission spectrometry, Ion selective electrode-fluoride, LA-ICP-MS, Laser ablation inductively coupled plasma-mass spectrometry, MRP, Microprobe, Mineral Resources Program, Mountain Pass mine, REE, Rare earth elements, San Bernardino County, USGS, USGS Science Data Catalog (SDC), United States Geological Survey, WDXRF, Wavelength dispersive X-ray fluorescence, Wyoming, Wyoming, geochemistry, rare earth elements, Fewer tags Alaska permafrost characterization: Electrical Resistivity Tomography (ERT) data collected in 2021 Geophysical measurements were collected by the U.S. Geological Survey (USGS) at five sites in Interior Alaska in September 2021 for the purposes of imaging permafrost structure and quantifying variations in subsurface moisture content in relation to thaw features. Electrical resistivity tomography (ERT) measurements were made along transects 110 - 222 m in length to quantify subsurface permafrost characteristics. ERT transects were collected across a fireline boundary within the Bonanza Creek Long Term Ecological Research (LTER) site where repeat measurements have been made since 2014; across and adjacent to two thermokarst lakes, Vault Lake and Goldstream Lake; and along two profiles at the North Star golf course... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Borehole nuclear magnetic resonance, Disturbance, All tags... Electrical resistivity tomography, Fairbanks North Star Borough, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Land Change Science Program, LandCarbon Program, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), electrical resistivity imaging, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, soil moisture, soil temperature, Fewer tags Airborne magnetic and radiometric survey, northwestern Minnesota, 2021 This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over parts of northwestern Minnesota near the town of Mentor. The airborne survey was funded by the Earth Mapping Resources Initiative and was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of 40,139-line km of magnetic and radiometric data were acquired over an irregular-shaped area of 9140 km2. Data were collected from a fixed-wing aircraft flown at mean terrain clearance of 120 meters (m) above topography along N-S flight lines spaced at 250 m intervals. Tie lines were flown in an E-W direction every 2500 m. Data were collected... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: "Economic Geology"], "Mineral Resources", "Structural Geology", "Water Quality", "Water Resources", All tags... Becker County, Clay County, Clearwater River, Earth Mapping Resources Initiative, EarthMRI, GGGSC, Geology, Geophysics, and Geochemistry Science Center, MRP, Marsh River, Marshall County, Mentor Complex, Mineral Resources Program, Minnesota, Norman County, Pennington County, Polk County, Red Lake County, Red Lake River, Silver River, Thief River, Thief River Falls, U.S. Geological Survey, USA, USGS, USGS Science Data Catalog (SDC), United States, United States of America, Wild Rice River, ["Geophysics", aeromagnetic surveying, aeroradiometric surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, horizontal magnetic gradiometry, magnetic field (earth), northwestern Minnesota, potassium, thorium, uranium, vertical magnetic gradient, Fewer tags Airborne Geophysical Surveys over the 2011 Mineral, Virginia, Earthquake Area Airborne Geophysical Surveys over the 2011 Mineral, Virginia, Earthquake Area The 2011 moment magnitude (Mw) 5.8 central Virginia earthquake was felt by millions of people and caused significant damage in the eastern United States. As part of efforts to better understand the faults and geologic features associated with the earthquake, the U.S. Geological Survey commissioned airborne geophysical surveys over the epicentral area. Here we present the data from those surveys and summarize research results based on those datasets. The following items can be obtained by following links on this page: - Background information on the Mineral, Virginia earthquake and a summary of first analysis results - Downloadable... Categories: Data, Publication; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: USGS Science Data Catalog (SDC) Magnetotelluric sounding locations, stations 1 to 22, Southern San Luis Valley, Colorado, 2006 This dataset includes the locations of magnetotelluric (MT) stations collected in 2006 in the Southern San Luis Valley, Colorado. The U.S. Geological Survey conducted a series of multidisciplinary studies, including MT surveys, in the San Luis Valley to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. The shallow unconfined and the deeper confined Santa Fe Group aquifers in the San Luis Basin are the main sources of municipal water for the region. The population of the San Luis Valley region is growing rapidly and water shortfalls could have serious consequences. Future growth and land... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Colorado, Costilla County, Electromagnetic surveying, GIS, GPS measurement, All tags... Geophysics, MT, Magnetic field (earth), Magnetic surveying, Rocky Mountains, San Luis Valley, USGS Science Data Catalog (SDC), apparent resistivity, geographic information systems, geoscientificinformation, geospatial dataset, impedance, impedance phase, impedance strike, magnetotelluric, sounding, tipper, Fewer tags Alaska permafrost characterization: Geophysical and related field data collected from 2019-2020 Geophysical measurements were collected by the U.S. Geological Survey (USGS) at two sites in Interior Alaska in 2019 and 2020 for the purposes of imaging permafrost structure and quantifying variations in subsurface moisture content in relation to thaw features. In September 2019, electrical resistivity tomography (ERT) and downhole nuclear magnetic resonance (NMR) data were used to quantify permafrost characteristics across the shorelines of Big Trail Lake, a thermokarst lake outside of Fairbanks, Alaska. Three 222 m ERT survey lines were collected perpendicular to the North, East, and South shorelines, and two 110 m lines were collected parallel to the southeast and northeast shorelines. Models of electrical resistivity... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Big Trail Lake, Bonanza Creek Experimental Forest, Borehole nuclear magnetic resonance, All tags... Disturbance, Electrical Resistivity Tomography, Fairbanks North Star, Fire, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Hydrologic processes, Hydrology, Land Change Science Program, Permafrost, Soil Sciences, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), electrical resistivity, environment, fires, geoscientificInformation, hydrologic processes, permafrost, soil moisture, Fewer tags « 1 2 3 4 5 6 7 »