{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Callum A. Walter", "hasEmail": "mailto:cwalter@usgs.gov"}, "description": "This data release provides ground magnetic data collected in May 2025 at the Mammoth Magnetic\nAnomaly (MMA) site in Pinal County, Arizona.  These data were collected to validate and characterize\na large aeromagnetic anomaly observed in an airborne survey of southeastern Arizona (Scheirer et al., 2025).\nThe geophysical fieldwork was funded by the Earth Mapping Resources Initiative.\nGround survey data were collected during walking traverses using a backpack magnetometer system\n(G858 cesium-vapor magnetometer) and using the magnetometers in two Apple iPhones, which can acquire\nmagnetic data below the observation floor (nominally 18,000 nT) of the G858 system.\nThis data release includes files of the base station magnetic data and the\nroving magnetic data.\nAny use of trade, firm, or product names is for descriptive purposes only and does\nnot imply endorsement by the U.S. Government.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P13LYAKZ", "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.688bbe8ed4be025d5d20f717.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_688bbe8ed4be025d5d20f717", "keyword": ["Aeromagnetic survey", "Arizona", "Earth Mapping Resources Initiative", "EarthMRI", "Economic Geology", "GMEGSC", "Geology, Minerals, Energy, and Geophysics Science Center", "Geophysics", "Geospatial datasets", "Ground geophysical survey", "MRP", "Magnetic field (earth)", "Mineral Resources", "Mineral Resources Program", "U.S. Geological Survey", "USGS", "USGS:688bbe8ed4be025d5d20f717", "United States of America", "geoscientificInformation"], "modified": "2025-11-14T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-110.569558, 32.786602, -110.542658, 32.806773", "theme": ["geospatial"], "title": "Ground Magnetic Observations of the Mammoth Magnetic Anomaly, Pinal County, Arizona, May 2025"}