{
  "accessLevel": "public",
  "bureauCode": [
    "010:12"
  ],
  "contactPoint": {
    "@type": "vcard:Contact",
    "fn": "Daniel S Scheirer",
    "hasEmail": "mailto:dscheirer@usgs.gov"
  },
  "description": "This data release provides digital geospatial data related to the three-dimensional\ngeologic model (Hosford Scheirer, 2013) that was used as a framework for conducting the 2003 oil and gas assessment\nof the San Joaquin Basin province, California (Gautier and others, 2004; Hosford Scheirer, ed., 2007).\nThe data release includes raster GeoTIFF files of the tops of the 15 composite geologic units created for\nthe three-dimensional geologic model of Hosford Scheirer (2013), as well as the thicknesses of\nthe modeled units.  Model units are referred to as composite units because they incorporate various\nstratigraphic units that exhibit facies variations, structural complexities, and inconsistent nomenclature;\nthey also force the top of each model unit within the three-dimensional model to be a single age.\nThe data release also includes a CSV\nfile and an ESRI shapefile (SHP) of well picks that were used in conjunction with other data to generate\nthe three-dimensional geologic model in EarthVision (Dynamic Graphics, Inc.).  Two Microsoft Excel (XLSX) files\ndescribe the contents of the raster files and the well files, presenting this information\nin a more human-readable format than is presented in this XML metadata file.  In addition,\nthe data release provides ESRI shapefiles of the San Joaquin Basin province\noutline and of a boundary between areas of surface geology correspondence and unresolved complexity, as described\nin Hosford Scheirer (2013).  Unlike in the illustrations of Hosford Scheirer (2013), the surface and thickness grids\nhave been truncated to the west of this unresolved complexity boundary.  While the geologic model\nwas sufficiently detailed for oil and gas assessment purposes, the model\nis not sufficiently detailed for mapping purposes in the area of unresolved complexity.\nFor the files containing well information, values of NULL (CSV) and NaN (SHP) in any field indicate an\nabsence of information.  Data sources of formation-top depths in wells are (1) California Department of\nConservation, Division of Oil, Gas, and Geothermal Resources Annual Reports (2007); (2) published\ncross sections of the Pacific Section of the American Association of Petroleum Geologists\n(PS-AAPG, 1957a, b, 1958a, b, 1959, 1989); (3) Imperato (1995); (4) Johnson and others (2005); and (5) Reid (1988).\nUsers interested in the gridded surfaces of this data release may also access Appendix 7.1 in Hosford\nScheirer (2013).  Appendix 7.1 (https://pubs.usgs.gov/pp/pp1713/07/pp1713_ch07_appendices/pp1713_ch07_appendix7.1_EarthVision_model.zip)\ncontains the three-dimensional geologic model of the\nSan Joaquin Basin that can be visualized with embedded EarthVision (Dynamic Graphics, Inc.)\nviewing software.  The composite unit surfaces in the EarthVision model are matched as well as\npossible in this data release using open, geospatial raster data formats.",
  "distribution": [
    {
      "@type": "dcat:Distribution",
      "accessURL": "https://doi.org/10.5066/P13X4U5W",
      "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.695e9fabd4be0219be413bde.xml",
      "format": "XML",
      "mediaType": "text/xml",
      "title": "Original Metadata"
    }
  ],
  "identifier": "http://datainventory.doi.gov/id/dataset/USGS_695e9fabd4be0219be413bde",
  "keyword": [
    "Assessment Units",
    "California",
    "ERP",
    "Energy Resources Program",
    "Geospatial Datasets",
    "Oil Resources",
    "San Joaquin Valley",
    "Sedimentology",
    "Structural Geology",
    "U.S. Geological Survey",
    "USGS",
    "USGS:695e9fabd4be0219be413bde",
    "United States",
    "geoscientificInformation"
  ],
  "modified": "2026-02-19T00:00:00Z",
  "publisher": {
    "@type": "org:Organization",
    "name": "U.S. Geological Survey"
  },
  "spatial": "-121.4, 37.9, -118.5, 34.8",
  "theme": [
    "geospatial"
  ],
  "title": "Digital database of previously published subsurface unit tops from the three-dimensional geologic model used for the 2003 National Oil and Gas Assessment of the San Joaquin Basin Province, California"
}