{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Allison R Trcka", "hasEmail": "mailto:atrcka@usgs.gov"}, "description": "This data release provides the full analytical dataset for fourteen new argon\u2011argon (\u2074\u2070Ar/\u00b3\u2079Ar) radiometric ages from olivine tholeiite basalt flows at the Idaho National Laboratory (INL) on the eastern Snake River Plain, Idaho. Samples were collected from basalt flows in eight subsurface coreholes (43\u2013450 ft below land surface) and five surface sites. The release includes machine\u2011generated raw isotopic measurements, all calculated age estimates for each heating step and sample split, analytical uncertainties, and documentation of the complete \u2074\u2070Ar/\u00b3\u2079Ar analytical procedures. Ar\u2013Ar diagrams are provided for each sample.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P1ZF2PJF", "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.68925132d4be0275eef5cf35.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_68925132d4be0275eef5cf35", "keyword": ["40Ar/39Ar", "433023113020301", "433130112562801", "433447112581501", "433611112595800", "433823112460401", "433910112550301", "434939112422001", "49-degree", "AEC Butte", "Ar/Ar", "Butte County", "C1A", "CFA Buried Vent", "Crater Butte", "Eastern Snake River Plain", "INL Lithologic Core Storage Library", "INLPO", "Idaho", "Idaho National Engineering Laboratory", "Idaho National Laboratory", "Lavatoo Butte", "Microwave Butte", "NRF 6P", "Noble Gas Laboratory", "North INTEC", "Pond Butte", "Rutgers University", "Sixmile Butte", "Snake River Plain basaltic-rock aquifers", "TAN 2312", "Teat Butte", "Tin Cup Butte", "USGS 130", "USGS 132", "USGS 134", "USGS 136", "USGS 139", "USGS:68925132d4be0275eef5cf35", "Vent 5119", "Vent 5252", "Vent 5334", "Wright-Riemann Laboratory", "age estimation methods", "argon", "argon-argon", "geoscientificInformation", "noble gas", "radiometric dating"], "modified": "2026-08-04T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-113.1700, 43.4400, -112.4600, 44.0100", "theme": ["geospatial"], "title": "Raw data for fourteen new argon-argon radiometric dates from a subset of basalt flows at the Idaho National Laboratory, Idaho"}