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Despite its subdued expression and isolated location within the Great Plains of southeastern Colorado, the 80-km-long Cheraw fault may be one of the most active faults in North America east of the Southern Rocky Mountains. We present geomorphic analyses, geochronology, and paleoseismic trenching data to 1) document the rupture history of the ~45-km-long southwestern section of the Cheraw fault over the past ~19 ka, and 2) evaluate slip-rate changes for the entire fault over the past ~200 ka. Results from new trenches excavated at the Old Ranch site show evidence of four surface-rupture events since ~19 ka, each with an average vertical displacement of 0.75 m. An additional event is likely only slightly older than...
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This data release documents neotectonic mapping of fault-related features on high-resolution lidar-derived topography, data documenting an exposure of the South Lajas fault, and summary information for active and potentially active Quaternary faults on the island of Puerto Rico. The data documenting the exposure of the South Lajas fault include detailed unit descriptions, radiocarbon sample descriptions, data, and results, and a structure-from-motion-derived orthophoto mosaic of the exposure. Luminescence data and ages for the exposure can be found in a related data release. These datasets are associated with the manuscript: Thompson Jobe, J. A. R. Briggs, K. S. Hughes, J. Joyce, R. Gold, S. Mahan, H. Gray, L. Strickland...
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The following report summarizes the dating results from Aeolian deposits within and around Edwards Air Force Base in California. Within this report, we detail the methodology used by the USGS Luminescence Geochronology Laboratory to obtain ages including sample preparation methods, luminescence measurement, equivalent dose determination, and dating related calculations. We recommend that this report be included as the supplementary material for any publication(s) that use the ages within this report. This version supersedes all previous age estimates and reports.
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This data release includes field observations and laboratory data for two trenches excavated across the Lost River fault zone, Idaho, in September 2019. The field sites include the Sheep Creek site (44.282541 degrees N, 113.941193 degrees W) on the southernmost Warm Springs section and the Arentson Gulch site (44.247816 degrees N, 113.918554 degrees W) on the northernmost Thousand Springs section. Field observations include descriptions of stratigraphic units exposed in the trenches; laboratory data include 41 radiocarbon ages and 4 infrared stimulated luminescence ages.
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This data release includes geochronological data for a natural exposure of the Wasatch fault, Utah at the Deep Creek site (39.507462°, -111.861790°). Laboratory data include 11 optically stimulated luminescence (OSL) ages for quartz, 23 charcoal radiocarbon ages, and 342 portable OSL (bulk luminescence) measurements. The radiocarbon and luminescence samples were collected November 2019 and October 2020.
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This data release includes geochronological data for a paleoseismic trench exposure of the Sawtooth fault, Idaho at the Dutch Lake site (44.343806, -115.17643). Laboratory data include 14 charcoal radiocarbon ages processed at the Woods Hole Oceanographic Institution (WHOI) National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS) and 8 infrared stimulated luminescence (IRSL) ages for feldspar processed at the U.S. Geological Survey Luminescence Dating Laboratory. The radiocarbon and luminescence samples were collected September 2022.
    map background search result map search result map Data release for luminescence: Edwards Air Force Base (CA) and CA Water Science Center report including luminescence data and ages Field and Laboratory Data for the Sheep Creek and Arentson Gulch Trench Sites, Lost River Fault Zone, Idaho Geochronological data for the Deep Creek paleoseismic site, Wasatch fault zone, Utah Data Release for Luminescence: Mid to Late Quaternary Geomorphic and Paleoseismic Event History, Cheraw Fault, Colorado Geochronological data for the Dutch Lake paleoseismic site, Sawtooth fault, Idaho Datasets documenting neotectonic mapping of Puerto Rico Geochronological data for the Deep Creek paleoseismic site, Wasatch fault zone, Utah Field and Laboratory Data for the Sheep Creek and Arentson Gulch Trench Sites, Lost River Fault Zone, Idaho Data Release for Luminescence: Mid to Late Quaternary Geomorphic and Paleoseismic Event History, Cheraw Fault, Colorado Data release for luminescence: Edwards Air Force Base (CA) and CA Water Science Center report including luminescence data and ages Datasets documenting neotectonic mapping of Puerto Rico