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Location Folder Show Tree ROOT _Users Filters Date Range Past year (3) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Linda F Zarr Martha (Rebecca) R. Stokes U.S. Geological Survey Daniel G Galeone U.S. Geological Survey - ScienceBase More... Categories Data (3) Tag Types Theme (3) Place (3) Harvest Set (3) USGS Scientific Topic Keyword (2) Tag Schemes USGS Thesaurus (2) USGS (1) Common geographic areas (2) Geographic Names Information System (GNIS) (1) ISO 19115 Topic Category (2) View Results as: JSON ATOM CSV Browse Folder

Evidence for strain induced graphitization across a ductile fault zone A suite of slate samples collected along a 2 km transect crossing the Lishan Fault in central Taiwan were evaluated to assess the role of ductile strain energy in natural graphitization at greenschist facies metamorphic conditions. Scanning electron microscope (SEM) imaging documents phyllosilicate and quartz replacement textures consistent cleavage development via dissolution-precipitation processes that increase in intensity from east to west. X-ray diffraction data reveal an east-to-west linear decrease in the full-width-at-half-maximum (FWHM) values of the 004 muscovite peaks and shifts towards higher 2θ (lower d) values. Rietveld refinements required two distinct muscovite populations and muscovite microstrain... Categories: Data, Data Release - Under Revision; Tags: Electron Microprobe Analysis, Electron Petrography, Energy Resources, Energy Resources, Geochemistry, All tags... Graphitization, Greenschist, Raman Spectroscopy, Slate, Taiwan, Thermal Proxy, USGS Science Data Catalog (SDC), X-ray Diffraction, Fewer tags Monthly crop irrigation withdrawals and efficiencies by HUC12 watershed for years 2000-2020 within the conterminous United States The USGS has published United States water-use data every five years since 1950. To increase the temporal and spatial availability of water use estimates using nationally consistent methods, the USGS is developing national water-use models for each major water-use category. This data release publishes crop irrigation withdrawals for the conterminous United States (CONUS) that are calculated using modeled irrigation consumptive use (Martin and others, 2023), irrigation efficiencies, and source-water proportions (Dieter and others, 2018). Crop irrigation withdrawals and irrigation consumptive use refer to water removed and consumed, respectively, from a groundwater or surface-water source to produce agricultural crops.... Categories: Data, Data Release - Under Revision; Tags: USGS Science Data Catalog (SDC), United States, Water Resources, inlandWaters, irrigation, All tags... water use, Fewer tags Groundwater, surface water, and soil data collected near and at the Ammonium Perchlorate Rocket Motor Destruction (ARMD) facility at the Letterkenny Army Depot, Chambersburg, Pennsylvania Sampling was conducted by the U.S. Geological Survey (USGS) at four wells, one surface water site, and five soil sampling locations near and at the Ammonium Perchlorate Rocket Motor Destruction (ARMD) facility at the Letterkenny Army Depot. Analytical results for groundwater samples collected in 2021 are provided in “ARMD_wells_data_2021.xlsx”. Analytical results for surface-water samples collected in 2021 are provided in “ARMD_sw_data_2021.xlsx”. Analytical results for soil samples collected in 2021 are provided in “ARMD_soil_data_2021.xlsx”. The data files with analytical results also include quality assurance/quality control sample results. Categories: Data, Data Release - Under Revision; Tags: Franklin Coumty, Pennsylvania, USGS Science Data Catalog (SDC), environment, groundwater quality, All tags... soil chemistry quality, surface water-quality, Fewer tags