{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Jean M. Morrison", "hasEmail": "mailto:jmorrison@usgs.gov"}, "description": "Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to analyze acid residues from heavy mineral separates, polished grain mounts, and clays from sampled sediments as 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). \nResults from EDS and SEM are presented as PDF reports and TIFF images. These data are part of a data release including grain size distribution, photographic and associated chemical and mineral analysis data for 36 sediment core and alluvium samples as well as select grains from magnetic and heavy mineral separates collected near Hinkley, CA. The cooperator for this study is the Lahontan Regional Water Quality Control Board. Results are provided in this data release organized by analysis type.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9HUPMG0", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5b759164e4b0f5d5787fe4f7.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5b759164e4b0f5d5787fe4f7", "keyword": ["California", "Hinkley", "USGS:5b759164e4b0f5d5787fe4f7", "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"], "modified": "2020-09-29T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-117.6202, 34.3425, -117.1071, 34.9972", "theme": ["geospatial"], "title": "Energy Dispersive Spectroscopy and Scanning Electron Microscopy Results from Field Samples near Hinkley, California"}