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USGS Geoscience Data Catalog

Geologic map and map database of northeastern San Francisco Bay region, California; Most of Solano County and parts of Napa, Marin, Contra Costa, San Joaquin, Sacramento, Yolo, and Sonoma Counties

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Frequently anticipated questions:


What does this data set describe?

Title:
Geologic map and map database of northeastern San Francisco Bay region, California; Most of Solano County and parts of Napa, Marin, Contra Costa, San Joaquin, Sacramento, Yolo, and Sonoma Counties
Abstract:
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (nesfmf.ps, nesfmf.pdf, nesfmf.txt), it provides current information on the geologic structure and stratigraphy of the area covered. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps limits the spatial resolution (scale) of the database to 1:62,500 or smaller.
Supplemental_Information:
This report consists of a set of geologic map database files (Arc/ Info coverages) and supporting text and plotfiles. In addition, the report includes two sets of plotfiles (PostScript and PDF format) that will generate map sheets and pamphlets similar to a traditional USGS Miscellaneous Field Studies Report. These files are described in the explanatory pamphlets (nesfmf.ps, nesfmf.pdf, or nesfmf.txt). The base map layer used in the preparation of the geologic map plotfiles was derived from scanned and vectorized versions of USGS 1:125,000 scale regional topographic maps (Aitken, 1997).
  1. How might this data set be cited?
    Graymer, R.W., Jones, D.L., and Brabb, E.E., 2002, Geologic map and map database of northeastern San Francisco Bay region, California; Most of Solano County and parts of Napa, Marin, Contra Costa, San Joaquin, Sacramento, Yolo, and Sonoma Counties: U.S. Geological Survey Miscellaneous Field Studies Map MF-2403, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -122.52034969
    East_Bounding_Coordinate: -121.49662436
    North_Bounding_Coordinate: 38.75857133
    South_Bounding_Coordinate: 37.98731969
  3. What does it look like?
    http://pubs.usgs.gov/mf/2002/2403/mf2403h.jpg (JPEG)
    Reduced-size image of the entire map sheet, 576x442 pixels, 46k bytes.
    http://pubs.usgs.gov/mf/2002/2403/mf2403f.pdf (PDF)
    Printable version of the entire map sheet, optimized for onscreen viewing, 7.4 MB.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2002Currentness_Reference:
    The date given is the publication date. The information in the report is the most up-to-date available at the time of publication.
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • Point
      • String
      • GT-polygon composed of chains
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: State Plane Coordinate System 1927
      State_Plane_Coordinate_System:
      SPCS_Zone_Identifier: 3326
      Lambert_Conformal_Conic:
      Standard_Parallel: 37.066667
      Standard_Parallel: 38.433333
      Longitude_of_Central_Meridian: -120.5
      Latitude_of_Projection_Origin: 36.5
      False_Easting: 609601.219202
      False_Northing: 0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 1.0
      Ordinates (y-coordinates) are specified to the nearest 1.0
      Planar coordinates are specified in METERS
      The horizontal datum used is NAD27.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    NESF2-GEOL.PAT
    Attribute table of NESF2-GEOL.
    PTYPE
    Geologic unit label (Source: author)
    ValueDefinition
    H2Owater
    JbCoast Range ophiolite, basalt
    JgbCoast Range ophiolite, gabbro
    JsvKeratophyre and quartz keratophyre tuff
    KJfmMetagraywacke (Cretaceous(?) and Jurassic)
    KJfm?Metagraywacke (Cretaceous(?) and Jurassic), identification uncertain
    KJgvSandstone and shale (Early Cretaceous and Late Jurassic)
    KcsMassive sandstone (Cretaceous)
    KfsSandstone (Late Cretaceous)
    KgvnNovato conglomerate
    KuUndivided sandstone, siltstone, and shale (Late Cretaceous)
    Ku?Undivided sandstone, siltstone, and shale (Late Cretaceous), identification uncertain
    KuhMassive sandstone (Late Cretaceous)
    KusSandstone, siltstone, and shale (Late Cretaceous)
    QThHuichica Formation
    QThgHuichica and Glen Ellen Formations, undivided
    QThg?Huichica and Glen Ellen Formations, undivided, identification uncertain
    QTuSandstone, siltstone, and gravel (early Pleistocene and late Pliocene)
    QaAlluvium (Holocene and late Pleistocene)
    QfAlluvial fan deposits (Holocene and late Pleistocene)
    QhaAlluvium (Holocene)
    QhbBasin deposits (Holocene)
    QhbmBay mud (Holocene)
    QhcStream channel deposits (Holocene)
    QhfAlluvial fan deposits (Holocene)
    QhffFine-grained alluvial fan deposits (Holocene)
    QhfpFloodplain deposits (Holocene)
    QhlNatural levee deposits (Holocene)
    QlsLandslide deposits
    QoaAlluvium (late and early Pleistocene)
    QopPediment deposits (late and early Pleistocene)
    QpfAlluvial fan deposits (late Pleistocene)
    TbhBriones Sandstone, Hambre shale member
    TblBriones Sandstone, lower member
    TbrBriones Sandstone
    TbuBriones Sandstone, upper member
    TcCierbo Sandstone
    TccClaremont Shale
    Tcc?Claremont Shale, identification uncertain
    TcglConglomerate (late Miocene)
    TdDomingene Sandstone
    Td?Domingene Sandstone, identification uncertain
    TdiDiatomite (middle to early Miocene)
    TdmDonall Ranch volcanics of Youngman (1989), mafic member
    TdrDonall Ranch volcanics of Youngman (1989), rhyolite member
    TehEscobar Sandstone of Weaver (1953), basal shale member
    TesEscobar Sandstone of Weaver (1953)
    ThHambre Sandstone
    TlLawlor Tuff
    TljLas Juntas Shale of Weaver (1953)
    TljlLas Juntas Shale of Weaver (1953), lower member
    TljuLas Juntas Shale of Weaver (1953), upper member
    TmMeganos Formation
    TmkMarkley Sandstone
    Tmk?Markley Sandstone, identification uncertain
    TmkjMarkley Sandstone, Jameson shale member
    TmklMarkley Sandstone, lower member
    TmrMuir Sandstone of Weaver (1953)
    Tmr?Muir Sandstone of Weaver (1953), identification uncertain
    TmrlMuir Sandstone of Weaver (1953), lower member
    TmruMuir Sandstone of Weaver (1953), upper member
    TmzMartinez Formation
    Tmz?Martinez Formation, identification uncertain
    TnNeroly Sandstone
    TnvNortonville Shale Member of Kreyenhagen Formation
    TorOrinda Formation
    TpcPetaluma Formation, claystone member
    TpsPetaluma Formation, mudrock, sandstone, and conglomerate member
    Tps?Petaluma Formation, mudrock, sandstone, and conglomerate member, identification uncertain
    TptPinole Tuff
    TpthTehama Formation
    TrRodeo Shale
    TsSobrante Sandstone
    TsaSandstone (middle to early Miocene)
    TsrSan Ramon Sandstone
    TsvSonoma Volcanics
    TsvaSonoma Volcanics, andesite to basalt flows
    Tsva?Sonoma Volcanics, andesite to basalt flows, identifiction uncertain
    TsvrSonoma Volcanics, rhyolite flows
    Tsvr?Sonoma Volcanics, rhyolite flows, identification uncertain
    TsvriSonoma Volcanics, rhyolite plugs and dikes
    TsvsSonoma Volcanics, volcanic sandstone, siltstone, and conglomerate
    Tsvs?Sonoma Volcanics, volcanic sandstone, siltstone, and conglomerate, identification uncertain
    TsvtSonoma Volcanics, ash-flow tuff
    Tsvt?Sonoma Volcanics, ash-flow tuff, identification uncertain
    TsvwSonoma Volcanics, welded ash-flow tuff
    Tsvw?Sonoma Volcanics, welded ash-flow tuff, identification uncertain
    TtTice Shale
    TutTuffaceous sandstone (late Miocene)
    TvCierbo Sandstone, intercalated basalt
    TvhVine Hill Sandstone of Weaver (1953)
    Tvh?Vine Hill Sandstone of Weaver (1953), identification uncertain
    TvhlVine Hill Sandstone of Weaver (1953), lower member
    TvhuVine Hill Sandstone of Weaver (1953), upper member
    acArtificial channel deposits
    afArtificial fill
    afbmArtificial fill over Bay mud
    alfArtificial levee fill
    fsrMelange
    lsLimestone (age unknown)
    scSilica-carbonate rock
    spCoast Range ophiolite, serpentinite
    NESF2-GEOL.AAT
    Attribute table of NESF2-GEOL.
    LTYPE
    Type of geologic or geographic feature denoted by a line in the database.
    ValueDefinition
    contact, approx. locatedBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    contact, certainBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    contact, concealedBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    contact, inferredBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    fault, concealed, queriedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 10 mm at map scale (1:62,500) or within about 625 meters on the ground.
    fault, inferredStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    map boundaryEdge of the mapped area. Used primarily to bound polygons at the edge of the map database. The location of the boundary is well located as described in Positional_Accuracy
    reverse fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    reverse fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    reverse fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    thrust fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    thrust fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    thrust fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    thrust fault, inferredStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    water boundaryThe edge of a mapped body of water. This line is derived from the base map, and therefore is well-located as described in Positional_Accuracy.
    NESF3-GEOL.PAT
    Attribute table of NESF3-GEOL.
    PTYPE
    Geologic unit label
    ValueDefinition
    H2Owater
    JkKnoxville Formation
    JvBasalt and keratophyre
    KJfm?Metagraywacke (Cretaceous(?) and Jurassic), identification uncertain
    KJgvSandstone and shale (Early Cretaceous and Late Jurassic)
    KJgvmSandstone- and shale-matrix melange
    KJuSandstone and shale (Early Cretaceous and Late Jurassic), sandstone member
    KfFunks Formation
    KfoForbes Formation
    KgGuinda Formation
    KsSites Formation
    KshSandstone and shale (Late Cretaceous), siliceous shale member
    KuhsSandstone and shale (Late Cretaceous)
    KussSandstone and shale (Late Cretaceous), sandstone member
    Kuss?Sandstone and shale (Late Cretaceous), sandstone member, identification uncertain
    KvVenado Formation
    KyYolo Formation
    QaAlluvium (Holocene and late Pleistocene)
    QfAlluvial fan deposits (Holocene and late Pleistocene)
    QhaAlluvium (Holocene)
    QhbBasin deposits (Holocene)
    QhcStream channel deposits (Holocene)
    QhfAlluvial fan deposits (Holocene)
    QhfbFloodbasin deposits (Holocene)
    QhffFine-grained alluvial fan deposits (Holocene)
    QhlNatural levee deposits (Holocene)
    QhtTerrace deposits (Holocene)
    QlsLandslide deposits
    QoaAlluvium (late and early Pleistocene)
    QpbBasin deposits (late Pleistocene)
    QpfAlluvial fan deposits (late Pleistocene)
    QtTerrace deposits (Holocene and late Pleistocene)
    TdDomingene Sandstone
    TmkMarkley Sandstone
    TnNeroly Sandstone
    Tn?Neroly Sandstone, identification uncertain
    TnvNortonville Shale Member of Kreyenhagen Formation
    TnvlNortonville Shale Member of Kreyenhagen Formation, lower member
    TnvmNortonville Shale Member of Kreyenhagen Formation, middle member
    TnvuNortonville Shale Member of Kreyenhagen Formation, upper member
    TpbPutnam Peak Basalt
    TpthTehama Formation
    TpttTehama Formation, Putah Tuff member
    TpuShale and sandstone (Paleocene)
    TpusShale and sandstone (Paleocene), basal sandstone member
    TshShale (Eocene)
    TsvSonoma Volcanics
    TsvaSonoma Volcanics, andesite to basalt flows
    Tsva?Sonoma Volcanics, andesite to basalt flows, identification uncertain
    TsvadSonoma Volcanics, andesite to dacite flows
    TsvdSonoma Volcanics, diatomite
    TsvlSonoma Volcanics, lithic tuff
    TsvpSonoma Volcanics, rhyolite and perlitic flows and plugs
    TsvrSonoma Volcanics, rhyolite flows
    Tsvr?Sonoma Volcanics, rhyolite flows, identification uncertain
    TsvriSonoma Volcanics, rhyolite plugs and dikes
    TsvsSonoma Volcanics, volcanic sandstone, siltstone, and conglomerate
    TsvtSonoma Volcanics, ash-flow tuff
    TsvwSonoma Volcanics, welded ash-flow tuff
    afArtificial fill
    afbmArtificial fill over Bay mud
    alfArtificial levee fill
    spCoast Range ophiolite, serpentinite
    sp?Coast Range ophiolite, serpentinite, identification uncertain
    NESF3-GEOL.AAT
    Attribute table of NESF3-GEOL.
    LTYPE
    Type of geologic or geographic feature denoted by a line in the database.
    ValueDefinition
    contact, approx. locatedBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    contact, certainBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    contact, gradationalBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact is gradational (lacking a distinct position, but rather marking a gradual change in rock character), so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    fault, concealed, queriedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 10 mm at map scale (1:62,500) or within about 625 meters on the ground.
    fault, inferredStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    map boundaryEdge of the mapped area. Used primarily to bound polygons at the edge of the map database. The location of the boundary is well located as described in Positional_Accuracy
    scratch boundaryAn arbitrary line. Used primarily to divide large polygons that exceed ArcInfo specifications. The location of the boundary is arbitrary
    water boundaryThe edge of a mapped body of water. This line is derived from the base map, and therefore is well-located as described in Positional_Accuracy.
    NESF4-GEOL.PAT
    Attribute table of NESF4-GEOL.
    PTYPE
    Geologic unit label
    ValueDefinition
    H2Owater
    JvBasalt and keratophyre
    KJfm?Metagraywacke (Cretaceous(?) and Jurassic), identification uncertain
    KJgvSandstone and shale (Early Cretaceous and Late Jurassic)
    KJgvmSandstone- and shale-matrix melange
    KfFunks Formation
    KfoForbes Formation
    KgGuinda Formation
    KsSites Formation
    KshSandstone and shale (Late Cretaceous), siliceous shale member
    KussSandstone and shale (Late Cretaceous), sandstone member
    Kuss?Sandstone and shale (Late Cretaceous), sandstone member, identification uncertain
    KvVenado Formation
    KyYolo Formation
    QaAlluvium (Holocene and late Pleistocene)
    QhaAlluvium (Holocene)
    QhayYounger alluvium (late Holocene)
    QhbBasin deposits (Holocene)
    QhcStream channel deposits (Holocene)
    QhfAlluvial fan deposits (Holocene)
    QhlNatural levee deposits (Holocene)
    QlsLandslide deposits
    QoaAlluvium (late and early Pleistocene)
    QpaAlluvium (late Pleistocene)
    TpbPutnam Peak Basalt
    TpthTehama Formation
    TpttTehama Formation, Putah Tuff member
    TpuShale and sandstone (Paleocene)
    TshShale (Eocene)
    afArtificial fill
    alfArtificial levee fill
    spCoast Range ophiolite, serpentinite
    NESF4-GEOL.AAT
    Attribute table of NESF4-GEOL.
    LTYPE
    Type of geologic or geographic feature denoted by a line in the database.
    ValueDefinition
    contact, approx. locatedBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    contact, certainBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    contact, gradationalBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact is gradational (lacking a distinct position, but rather marking a gradual change in rock character), so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    county lineEdge of a county. Used primarily to bound polygons at the edge of a county where sources of map data vary. The location of the boundary is well located as described in Positional_Accuracy
    fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    fault, concealed, queriedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 10 mm at map scale (1:62,500) or within about 625 meters on the ground.
    map boundaryEdge of the mapped area. Used primarily to bound polygons at the edge of the map database. The location of the boundary is well located as described in Positional_Accuracy
    marker bedMap trace of a conglomerate or tuff marker bed too small to map as a separate polygon. The location of the marker bed is well located as described in Positional_Accuracy
    water boundaryThe edge of a mapped body of water. This line is derived from the base map, and therefore is well-located as described in Positional_Accuracy.
    NESF5-GEOL.PAT
    Attribute table of NESF5-GEOL.
    PTYPE
    Geologic unit label
    ValueDefinition
    H2Owater
    Kuhs?Sandstone and shale (Late Cretaceous), identification uncertain
    QTuSandstone, siltstone, and gravel (early Pleistocene and late Pliocene)
    QaAlluvium (Holocene and late Pleistocene)
    QdsDune sands (early Holocene and latest Pleistocene)
    Qds?Dune sands (early Holocene and latest Pleistocene), identification uncertain
    QfAlluvial fan deposits (Holocene and late Pleistocene)
    QhaAlluvium (Holocene)
    QhayYounger alluvium (late Holocene)
    QhbBasin deposits (Holocene)
    QhbmBay mud (Holocene)
    QhcStream channel deposits (Holocene)
    QhdmDelta mud deposits (Holocene)
    QhfAlluvial fan deposits (Holocene)
    QhfbFloodbasin deposits (Holocene)
    QhlNatural levee deposits (Holocene)
    Qhl?Natural levee deposits (Holocene), identification uncertain
    QlsLandslide deposits
    QmzMontezuma Formation
    QoaAlluvium (late and early Pleistocene)
    Qoa?Alluvium (late and early Pleistocene), identification uncertain
    QopPediment deposits (late and early Pleistocene)
    QpfAlluvial fan deposits (late Pleistocene)
    TcCierbo Sandstone
    TdDomingene Sandstone
    TlLawlor Tuff
    TmkMarkley Sandstone
    Tmk?Markley Sandstone, identification uncertain
    TmklMarkley Sandstone, lower member
    TmkuMarkley Sandstone, upper member
    TmzMartinez Formation
    TnNeroly Sandstone
    Tn?Neroly Sandstone, identification uncertain
    TnvNortonville Shale Member of Kreyenhagen Formation
    TpthTehama Formation
    TpuShale and sandstone (Paleocene)
    TshShale (Eocene)
    acArtificial channel deposits
    adsDredge spoils
    afArtificial fill
    afbmArtificial fill over Bay mud
    alfArtificial levee fill
    NESF5-GEOL.AAT
    Attribute table of NESF5-GEOL.
    LTYPE
    Type of geologic or geographic feature denoted by a line in the database.
    ValueDefinition
    contact, approx. locatedBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    contact, certainBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    contact, inferredBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    county lineEdge of a county. Used primarily to bound polygons at the edge of a county where sources of map data vary. The location of the boundary is well located as described in Positional_Accuracy
    fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    fault, concealed, queriedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 10 mm at map scale (1:62,500) or within about 625 meters on the ground.
    fault, inferredStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    map boundaryEdge of the mapped area. Used primarily to bound polygons at the edge of the map database. The location of the boundary is well located as described in Positional_Accuracy
    scratch boundaryAn arbitrary line. Used primarily to divide large polygons that exceed ArcInfo specifications. The location of the boundary is arbitrary
    thrust fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    water boundaryThe edge of a mapped body of water. This line is derived from the base map, and therefore is well-located as described in Positional_Accuracy.
    NESF-STRC.PAT
    Attribute table of NESF-STRC.
    PTTYPE
    The type of planar feature which was observed and the orientation of which was measured at this point.
    ValueDefinition
    approx beddingOriginally horizontal sedimentary layers were observed at this point. Because of poor exposure, weathering, indistinct layering, or some other factor, only the approximate orientation of the layers was measured.
    beddingOriginally horizontal sedimentary layers were observed at this point.
    bedding w/topsOriginally horizontal sedimentary layers were observed at this point. In addition, a geopedal indicator was observed that showed the beds were upright.
    foliationMetamorphic foliation was observed at this point.
    horz jointA horizontal rock fracture without apparent offset was observed at this point.
    jointA rock fracture without apparent offset was observed at this point.
    ot beddingOriginally horizontal sedimentary layers were observed at this point. Evidence that the beds are overturned was observed, although that observation may not have been made at this point.
    ot bedding w/topsOriginally horizontal sedimentary layers were observed at this point. In addition, a geopedal indicator was observed that showed the beds were overturned.
    vert beddingOriginally horizontal sedimentary layers were observed at this point. These layers are now vertical.
    DIP
    The inclination of planar structures measured in degrees down from horizontal.
    Range of values
    Minimum:0
    Maximum:90
    Units:degrees
    Resolution:1
    STRIKE
    The orientation of a horizontal line in an inclined planar structure measured in degrees clockwise from north.
    Range of values
    Minimum:0
    Maximum:359
    Units:degrees
    Resolution:1
    NESF-STRC.AAT
    Attribute table of NESF-STRC.
    LTYPE
    type of linear structural feature
    ValueDefinition
    f.a., anticline, approx. locatedFold axis of an anticline. The axis has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    f.a., anticline, certainFold axis of an anticline. The axis has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    f.a., anticline, concealedFold axis of an anticline. The axis is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    f.a., syncline, approx.locatedFold axis of a syncline. The axis has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    f.a., syncline, certainFold axis of a syncline. The axis has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    f.a., syncline, concealedFold axis of a syncline. The axis is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    map boundaryEdge of the mapped area. The location of the boundary is well located as described in Positional_Accuracy
    NESF-QUAD.PAT
    Attribute table of NESF-QUAD.
    PTYPE
    Name of USGS 7.5' quadrangles within the map area
    ValueDefinition
    AllendaleAllendale7.5' quadrangle
    Antioch NorthAntioch North 7.5' quadrangle
    BeniciaBenicia7.5' quadrangle
    Birds LandingBirds Landing 7.5' quadrangle
    Bouldin IslandBouldin Island 7.5' quadrangle
    BrooksBrooks 7.5' quadrangle
    Capell ValleyCapell Valley 7.5' quadrangle
    CordeliaCordelia7.5' quadrangle
    Cuttings WharfCuttings Wharf 7.5' quadrangle
    DenvertonDenverton 7.5' quadrangle
    DixonDixon7.5' quadrangle
    DozierDozier7.5' quadrangle
    ElmiraElmira 7.5' quadrangle
    EspartoEsparto7.5' quadrangle
    Fairfield NorthFairfield North 7.5' quadrangle
    Fairfield SouthFairfield South 7.5' quadrangle
    Honker BayHonker Bay 7.5' quadrangle
    IsletonIsleton7.5' quadrangle
    Jersey IslandJersey Island 7.5' quadrangle
    Lake BerryessaLake Berryessa 7.5' quadrangle
    MadisonMadison7.5' quadrangle
    Mare IslandMare Island 7.5' quadrangle
    MerritMerrit 7.5' quadrangle
    Monticello DamMonticello Dam 7.5' quadrangle
    Mount GeorgeMount George 7.5' quadrangle
    Mount VacaMount Vaca 7.5' quadrangle
    Petaluma PointPetaluma Point 7.5' quadrangle
    Rio VistaRio Vista 7.5' quadrangle
    Sears PointSears Point 7.5' quadrangle
    Vine HillVine Hill 7.5' quadrangle
    WintersWinters 7.5' quadrangle
    WoodlandWoodland 7.5' quadrangle
    NESF-QUAD.AAT
    Enumerated_Domain_Value_Definition Calculated equal to NESF-QUAD#
    LTYPE
    Type of line recorded in the quadrangle index coverage.
    ValueDefinition
    quad boundaryEdge of a USGS 7.5-minute quadrangle in the map area. This line is derived from a 7.5-minute grid generated from latitude and longitude values and therefore should be precisely located.
    NESF-CORR.PAT
    Attribute table of NESF-CORR.
    PTYPE
    Labels of geologic units and areas of water.
    ValueDefinition
    JbCoast Range ophiolite, basalt
    JgbCoast Range ophiolite, gabbro
    JkKnoxville Formation
    JsvKeratophyre and quartz keratophyre tuff
    JvCoast Range ophiolite, basalt and keratophyre
    KJfmMetagraywacke (Cretaceous(?) and Jurassic)
    KJgvSandstone and shale (Early Cretaceous and Late Jurassic)
    KJgvmSandstone- and shale-matrix melange
    KJuSandstone and shale (Early Cretaceous and Late Jurassic), sandstone member
    KcsMassive sandstone (Cretaceous)
    KfFunks Formation
    KfoForbes Formation
    KfsSandstone (Late Cretaceous)
    KgGuinda Formation
    KgvnNovato conglomerate
    KsSites Formation
    KshSandstone and shale (Late Cretaceous), siliceous shale member
    KuUndivided sandstone, siltstone, and shale (Late Cretaceous)
    KuhMassive sandstone (Late Cretaceous)
    KuhsSandstone and shale (Late Cretaceous)
    KusSandstone, siltstone, and shale (Late Cretaceous)
    KussSandstone and shale (Late Cretaceous), sandstone member
    KvVenado Formation
    KyYolo Formation
    QThHuichica Formation
    QThgHuichica and Glen Ellen Formations, undivided
    QTuSandstone, siltstone, and gravel (early Pleistocene and late Pliocene)
    QaAlluvium (Holocene and late Pleistocene)
    QdsDune sands (early Holocene and latest Pleistocene)
    QfAlluvial fan deposits (Holocene and late Pleistocene)
    QhaAlluvium (Holocene)
    QhayYounger alluvium (late Holocene)
    QhbBasin deposits (Holocene)
    QhbmBay mud (Holocene)
    QhcStream channel deposits (Holocene)
    QhdmDelta mud (Holocene)
    QhfAlluvial fan deposits (Holocene)
    QhfbFloodbasin deposits (Holocene)
    QhffFine-grained alluvial fan deposits (Holocene)
    QhfpFloodplain deposits (Holocene)
    QhlNatural levee deposits (Holocene)
    QhtTerrace deposits (Holocene)
    QlsLandslide deposits
    QmzMontezuma Formation
    QoaAlluvium (late and early Pleistocene)
    QopPediment deposits (late and early Pleistocene)
    QpaAlluvium (late Pleistocene)
    QpfAlluvial fan deposits (late Pleistocene)
    QtTerrace deposits (Holocene and late Pleistocene)
    TbhBriones Sandstone, Hambre shale member
    TblBriones Sandstone, lower member
    TbrBriones Sandstone
    TbuBriones Sandstone, upper member
    TcCierbo Sandstone
    TccClaremont Shale
    TcglConglomerate (late Miocene)
    TdDomingene Sandstone
    TdiDiatomite (middle to early Miocene)
    TdmDonall Ranch volcanics of Youngman (1989), mafic member
    TdrDonall Ranch volcanics of Youngman (1989), rhyolite member
    TehEscobar Sandstone of Weaver (1953), basal shale member
    TesEscobar Sandstone of Weaver (1953)
    ThHambre Sandstone
    TlLawlor Tuff
    TljLas Juntas Shale of Weaver (1953)
    TljlLas Juntas Shale of Weaver (1953), lower member
    TljuLas Juntas Shale of Weaver (1953), upper member
    TmMeganos Formation
    TmkMarkley Sandstone
    TmkjMarkley Sandstone, Jameson shale member
    TmklMarkley Sandstone, lower member
    TmkuMarkley Sandstone, upper member
    TmrMuir Sandstone of Weaver (1953)
    TmrlMuir Sandstone of Weaver (1953), lower member
    TmruMuir Sandstone of Weaver (1953), upper member
    TmzMartinez Formation
    TnNeroly Sandstone
    TnvNortonville Shale Member of Kreyenhagen Formation
    TnvlNortonville Shale Member of Kreyenhagen Formation, lower member
    TnvmNortonville Shale Member of Kreyenhagen Formation, middle member
    TnvuNortonville Shale Member of Kreyenhagen Formation, upper member
    TorOrinda Formation
    TpbPutnam Peak Basalt
    TpcPetaluma Formation, claystone member
    TpsPetaluma Formation, mudrock, sandstone, and conglomerate member
    TptPinole Tuff
    TpthTehama Formation
    TpttTehama Formation, Putah Tuff member
    TpuShale and sandstone (Pleistocene)
    TpusShale and sandstone (Pleistocene), basal sandstone member
    TrRodeo Shale
    TsSobrante Sandstone
    TsaSandstone (middle to early Miocene)
    TshShale (Eocene)
    TsrSan Ramon Sandstone
    TsvSonoma Volcanics
    TtTice Shale
    TutTuffaceous sandstone (late Miocene)
    TvCierbo Sandstone, intercalated basalt
    TvhVine Hill Sandstone of Weaver (1953)
    TvhlVine Hill Sandstone of Weaver (1953), lower member
    TvhuVine Hill Sandstone of Weaver (1953), upper member
    acArtificial channel deposits
    adsDredge spoils
    afArtificial fill
    afbmArtificial fill over Bay mud
    alfArtificial levee fill
    fsrMelange
    scSilica-carbonate rock
    spCoast Range ophiolite, serpentinite
    NESF-CORR.AAT
    Attribute table of NESF-CORR.
    LTYPE
    Type of line used in the correlation chart
    ValueDefinition
    bracketBracket line in the correlation chart to delineate age categories
    boxEdge of a box in the correlation chart
    box, approx. locatedEdge of a box in the correlation chart representing a stratigraphic division of poorly constrained age
    contact, certainEdge of a box that represents a depositional contact between adjacent units
    leaderLeader line in the correlation chart to enable labeling of small boxes
    scratch boundaryNon-drawing line in the correlation chart to ensure annotation is entirely within the map boundary
    NESF-SO.PAT
    Attribute table of NESF-SO.
    PTYPE
    The index number of the area labeled that relates to the sources of data as shown in the explanation pamphlet (pamf.ps, pamf.pdf, pageo.ps, pageo.pdf, or pageo.txt) or in Lineage: Source_Information above. The major areas mapped as water are also shown.
    Range of values
    Minimum:1
    Maximum:14
    NESF-SO.AAT
    Attribute table of NESF-SO.
    LTYPE
    Type of line used in the Sources of Data Index Map coverage
    ValueDefinition
    map boundaryThe edge of the index map area.
    source boundaryThe boundary between regions within which different sources of data were used to supplement new mapping by the authors. The sources are delineated in Source_Information as well as plotfiles nesfmap.ps and nesfmap.pdf. This line is not well-located as described in Positional_Accuracy, and is included for general reference only.
    NESF-AS.PAT
    Attribute table of NESF-AS.
    PTYPE
    Stratigraphic assemblage distribution. Assemblages are described in the explanatory pamphlet (nesfmf.ps, nesfmf.pdf)
    ValueDefinition
    Area of Black Point assemblage 
    Area of Cordelia assemblage 
    Area of Hercules assemblage 
    Area of Martinez assemblage 
    Area of Pinole Point assemblage 
    Area of Pittsburg assemblage 
    Area of Rodeo assemblage 
    Area of Sears Point assemblage 
    Area of Sonoma assemblage 
    Area of Vacaville assemblage 
    Area of surficial deposits, water, or Franciscan Complex rocks 
    NESF-AS.AAT
    Attribute table of NESF-AS.
    LTYPE
    The type of line in the assemblage map.
    ValueDefinition
    contact, approx. locatedBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    contact, certainBoundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    fault, inferredStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    map boundaryEdge of the mapped area. Used primarily to bound polygons at the edge of the map database. The location of the boundary is well located as described in Positional_Accuracy
    reverse fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    reverse fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    reverse fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    scratch boundaryAn arbitrary line with no geologic or geographic significance. Used primarily to divide polygons that would otherwise have more vertices than allowed by Arc/Info.
    thrust fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    thrust fault, inferredStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    water boundaryThe edge of a mapped body of water. This line is derived from the base map, and therefore is well-located as described in Positional_Accuracy.
    NESF-FLT.AAT
    Attribute table of NESF-FLT.
    LTYPE
    The type of line in the fault map.
    ValueDefinition
    fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    fault, concealed, queriedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 10 mm at map scale (1:62,500) or within about 625 meters on the ground.
    fault, inferredStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    fault, inferred, queriedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 10 mm at map scale (1:62,500) or within about 625 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    reverse fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    reverse fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    reverse fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced reverse offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    thrust fault, approx. locatedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:62,500) or within about 125 meters on the ground.
    thrust fault, certainStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
    thrust fault, concealedStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground.
    thrust fault, inferredStructural boundary between mapped units or structural discontinuity within a mapped unit that has experienced thrust offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:62,500) or within about 312 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
    FAULTNAME
    Identity of named faults and strands of named fault zones
    ValueDefinition
    Concord FaultSegment belongs to the Concord Fault
    Cordelia FaultSegment belongs to the Cordelia Fault
    Franklin Canyon FaultSegment belongs to the Franklin Canyon Fault
    Green Valley FaultSegment belongs to the Green Valley Fault
    Hayward FaultSegment belongs to the Hayward Fault
    Lake Herman FaultSegment belongs to the Lake Herman Fault
    Pinole FaultSegment belongs to the Pinole Fault
    Rodgers Creek FaultSegment belongs to the Rodgers Creek Fault
    Southampton FaultSegment belongs to the Southampton Fault
    Sky Valley FaultSegment belongs to the Sky Valley Fault
    Tolay FaultSegment belongs to the Tolay Fault
    Wragg Canyon FaultSegment belongs to the Wragg Canyon Fault
    Entity_and_Attribute_Overview:
    The databases in this report were compiled in ARC/INFO, a commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California). Almost all the attributes in the various attribute tables of the coverages included in the report are set or calculated by Arc/Info. The exceptions are "coveragename"-ID, LTYPE, PTYPE, PTTYPE, FAULTNAME, STRIKE, and DIP. "coveragename"-ID is required by internal policy to be sequential. This ensures the highest compatibility of our databases with other GISs. Therefore "coveragename"-ID is calculated equal to "coveragename"#, which is a unique, sequential integer assigned by Arc/Info to each data record. LTYPE, PTYPE, and PTTYPE are author added items to the coverage AAT or PAT that are used to describe the type of line (LTYPE), area (PTYPE), or point (PTTYPE) being recorded. All coverages with AAT and PAT present include these items in the data structure. Each has WIDTH 35, OUTPUT 35, TYPE C. STRIKE and DIP are author added items to the coverage PAT that record information about the orientation of planar geologic structures. Both have WIDTH 3, OUTPUT 3, TYPE I. These items are only recorded in the table NESF-STRC.PAT. FAULTNAME is an author added item the coverage AAT that records information about the names of faults in the map area. It has WIDTH 35, OUTPUT 35, TYPE C. FAULTNAME is only recorded in the table NESF-FLT.AAT.
    Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/mf/2002/2403/mf2403g.pdf
  8. What are the components of this data set?
    nesf-as (ArcInfo coverage)
    Polygons, lines, and annotation of Tertiary stratigraphic assemblages in the map area (used in an index map)
    nesf-corr (ArcInfo coverage)
    Polygons and lines that comprise the diagram showing correlation of map units. These data are not georeferenced.
    nesf-flt (ArcInfo coverage)
    Lines showing faults in the map area (used in an index map)
    nesf-quad (ArcInfo coverage)
    Polygons, lines, and annotation showing the 7.5' quadrangles in the map area
    nesf-so (ArcInfo coverage)
    Polygons and lines showing sources of data for the map (used in an index map)
    nesf-strc (ArcInfo coverage)
    Points, lines, and annotation showing strike and dip information and fold axes in the map area
    nesf2-geol (ArcInfo coverage)
    Polygons and lines showing faults, depositional contacts, and rock units in the southwestern part of the map area
    nesf3-geol (ArcInfo coverage)
    Polygons and lines showing faults, depositional contacts, and rock units in the central part of the map area
    nesf4-geol (ArcInfo coverage)
    Polygons and lines showing faults, depositional contacts, and rock units in the northern part of the map area
    nesf5-geol (ArcInfo coverage)
    Polygons and lines showing faults, depositional contacts, and rock units in the southeastern part of the map area

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
    We would like to acknowledge our many colleagues at the USGS, University of California, and Stanford University for their many contributions over the years. We are grateful to the following U.S. Geological Survey paleontologists who have examined our fossils and provided ages necessary to establish the stratigraphic sequence and structure: David Bukry (Cretaceous and Tertiary nannoplankton), Kristin McDougall (Tertiary foraminifers), William Sliter (Cretaceous and Eocene foraminifers), John Barron (Tertiary diatoms), Charles Powell, II (Tertiary mollusks), and Benita Murchey (Mesozoic radiolaria). We are also very grateful to managers and staff of Chevron, EXXON, UNOCAL, ARCO, and Shell Petroleum Companies who have provided reports, maps, picked slides, and residues for about 25,000 microfossil localities in the San Francisco Bay Region. Finally, we are indebted to Roland Tabor and Andrei Sarna-Wojcicki for their thorough reviews of the manuscript for this report, as well as Charles Powell, II, for his review of stratigraphic nomenclature and Scott Graham for his review of the digital database.
  3. To whom should users address questions about the data?
    Russell W Graymer
    U.S. Geological Survey, GEO-WRG-NGM
    Mail Stop 975
    345 Middlefield Road
    Menlo Park, CA
    USA

    650-329-4988 (voice)
    650-329-4936 (FAX)
    rgraymer@usgs.gov

Why was the data set created?

This database and accompanying plot files depict the distribution of geologic materials and structures at a regional (1:62,500) scale. The report is intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide potential, mineral hazards, seismic velocity, and earthquake faults. In addition, the report contains new information and interpretations about the regional geologic history and framework. However, the regional scale of this report does not provide sufficient detail for site development purposes. In addition, this map does not take the place of fault-rupture hazard zones designated by the California State Geologist (Hart and Bryant, 1999). Similarly, the database cannot be used to identify or delineate landslides in the region.

How was the data set created?

  1. From what previous works were the data drawn?
    Blake and others (2000) (source 1 of 18)
    Blake, M.C., Jr., Graymer, R.W., and Jones, D.L., 2000, Digital geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma Counties, California: U.S. Geological Survey Miscellaneous Field Studies MF-2337.

    Type_of_Source_Media: Arc/Info coverage
    Source_Scale_Denominator: 62500
    Source_Contribution:
    Source map for region 1 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Fox and others (1985b) (source 2 of 18)
    Fox, K.F., Jr., Fleck, R.J., Curtis, G.H., and Meyer, C.E., 1985, Potassium-argon and fission track ages of the Sonoma Volcanics in an area north of San Pablo Bay, California: U.S. Geological Survey Miscellaneous Field Studies MF-1753.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 125000
    Source_Contribution:
    Source map for region 2 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Youngman (1986) (source 3 of 18)
    Youngman, M.R., 1986, K-Ar and 40Ar/39Ar geochronology, geochemistry, and structural reinterpretation of the southern Sonoma Volcanic field, Sonoma County, California: University of California, Berkeley, CA.

    Other_Citation_Details: M.S. thesis
    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 24000
    Source_Contribution:
    Source map for region 3 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Knudsen and others (2000) (source 4 of 18)
    Knudsen, K.L., Sowers, J.M., Witter, R.C., Wentworth, C.M., Helley, E.J., Nicholson, R.S., Wright, H.M., and Brown, K.M., 2000, Preliminary maps of Quaternary deposits and liquifaction susceptibility, nine-county San Francisco Bay region, California: U.S. Geological Survey Open-File Report 00-444.

    Type_of_Source_Media: Arc/Info database
    Source_Scale_Denominator: 275000 or better
    Source_Contribution:
    Source map for regions 4, 5 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Unruh and Hector (1999) (source 5 of 18)
    Unruh, J.R., and Hector, Scott, 1999, Subsurface characterization of the Potrero-Ryer Island thrust system, western Sacramento-San Joaquin Delta, Northern California: U.S. Geological Survey National Earthquake Hazards Reduction Program Technical Report.

    Type_of_Source_Media: paper maps
    Source_Contribution:
    Source map for region 4, 7, 8 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Weaver (1949) (source 6 of 18)
    Weaver, C.E., 1949, Geology of the Coast Ranges immediately north of the San Francisco Bay region, California: Geological Society of America, Boulder, CO.

    Other_Citation_Details: Geological Society of America Memoir
    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 62,500
    Source_Contribution:
    Source map for region 5, 8 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Graymer and others (1999) (source 7 of 18)
    Graymer, R.W., Jones, D.L., and Brabb, E.E., 1999, Geology of the and the northern part of the Benicia 7.5 minute quadrangles, California: A digital map database: U.S. Geological Survey Open-File Report 99-162.

    Type_of_Source_Media: Arc/Info coverage
    Source_Scale_Denominator: 24000
    Source_Contribution:
    Source map for region 6 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Graymer and others (1994) (source 8 of 18)
    Graymer, R.W., Jones, D.L., and Brabb, E.E., 1994, Preliminary geologic map emphasizing bedrock formations in Contra Costa County, California: a digital database: U.S. Geological Survey Open-File Report 94-622.

    Type_of_Source_Media: Arc/Info coverage
    Source_Scale_Denominator: 62500
    Source_Contribution:
    Source map for region 7 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Helley and Graymer (1997) (source 9 of 18)
    Helley, E.J., and Graymer, R.W., 1997, Quaternary geology of Contra Costa, and surrounding parts of Alameda, Marin, Sonoma, Solano, Sacramento, and San Joaquin Counties, California: a digital database: U.S. Geological Survey Open-File Report 97-98.

    Type_of_Source_Media: Arc/Info coverage
    Source_Scale_Denominator: 24000
    Source_Contribution:
    Source map for region 7 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    sonneman and Switzer (unpublished) (source 10 of 18)
    Sonneman, H.D., and Switzer, J.R., Jr., unpublished field investigations.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 62500
    Source_Contribution:
    Source map for region 8 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Sims and others (1973) (source 11 of 18)
    Sims, J.D., Fox, K.F., Jr., Bartow, J.A., and Helley, E.J., 1973, Preliminary geologic map of Solano County and parts of Napa, Contra Costa, Marin, and Yolo Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-484.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 62500
    Source_Contribution:
    Source map for region 8, 10, 12 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Atwater (1982) (source 12 of 18)
    Atwater, B.F., 1982, Geologic maps of the Sacramento-San Joaquin Delta, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-1401.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 24000
    Source_Contribution:
    Source map for region 9 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Fox (unpublished) (source 13 of 18)
    Fox, K.F., Jr., unpublished mapping.

    Type_of_Source_Media: paper map
    Source_Contribution:
    Source map for region 10 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Emerson and Roberts (1962) (source 14 of 18)
    Emerson, D.O., and Roberts, R.D., 1962, Geologic map of Putah Creek: California Division of Mines and Geology Bulletin v. 181, part IV, map 3.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 74500
    Source_Contribution:
    Source map for region 11 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Moiseyev (unpublished) (source 15 of 18)
    Moiseyev, A.N., unpublished mapping.

    Type_of_Source_Media: paper map
    Source_Contribution:
    Source map for regions 12 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Taliaferro (unpublished) (source 16 of 18)
    Taliaferro, N.L., unpublished mapping.

    Type_of_Source_Media: paper map
    Source_Contribution:
    Source map for regions 12 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Boyd (1956) (source 17 of 18)
    Boyd, H.A., 1956, Geology of the Capay quadrangle, California: University of California, Berkeley, CA.

    Other_Citation_Details: Ph.D. thesis
    Type_of_Source_Media: paper map
    Source_Contribution:
    Source map for region 13 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
    Helley and Barker (1979) (source 18 of 18)
    Helley, E.J., and Barker, J.A., 1979, Preliminary geologic map of Cenozoic deposits of the Woodland quadrangle, California: U.S. Geological Survey Open-File Map 79-1606.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 62500
    Source_Contribution:
    Source map for region 14 (see coverage nesf-so, or map sheet plotfile nesfmap.ps or nesfmap.pdf for index map of source regions)
  2. How were the data generated, processed, and modified?
    (process 1 of 2)
    Geologic linework was scanned, converted to vector data, and edited on-screen to repair errors visible at map scale. Polygon topology was created and each polygon tagged on-screen. Structural information was digitized by hand using a digitizing table. Plotfiles were created in ArcPlot.
    Date: 27-Jul-2009 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Russell W Graymer
    U.S. Geological Survey, GEO-WRG-NGM
    Mail Stop 975
    345 Middlefield Road
    Menlo Park, CA
    USA

    650-329-4988 (voice)
    650-329-4936 (FAX)
    rgraymer@usgs.gov
  3. What similar or related data should the user be aware of?
    Sims, J.D., Fox, K.F., Jr., Bartow, J.A., and Helley, E.J., 1971, Preliminary geologic map of Solano County and parts of Napa, Contra Costa, Marin, and Yolo Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-484.

    Other_Citation_Details:
    5 sheets, scale 1:62,500. This preliminary report is superceded by USGS MF2403.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    This report has undergone two scientific peer reviews, one digital database review, one review for conformity with geologic names policy, and review of the plotfiles for conformity with USGS map standards.
  2. How accurate are the geographic locations?
    Well located data items are intended to have a horizontal positional accuracy within .5 mm at 1:62,500 scale, or within 31 meters on the ground. The general positional accuracy of each line in the database is indicated within the LTYPE field in the Arc Attribute Table (see below). Points in the database are generally considered to be well located. The position of each data item is derived from the USGS topographic base map, and therefore additional inaccuracies arising from inaccuracies in the base map may also be encountered.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    The report is intended to describe completely the surficial deposits and bedrock geology at 1:62,500 scale. Geologic information only mappable at larger scale has been omitted. In addition, landslide deposits are for the most part not recorded.
  5. How consistent are the relationships among the observations, including topology?

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None
Use_Constraints:
Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited for a scale of 1:62,500 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:62,500 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    Russell W Graymer
    U.S. Geological Survey, GEO-WRG-NGM
    Mail Stop 975
    345 Middlefield Road
    Menlo Park, CA
    USA

    650-329-4988 (voice)
    650-329-4936 (FAX)
    rgraymer@usgs.gov
  2. What's the catalog number I need to order this data set? USGS Miscellaneous Field Studies Report MF-2403 consists of both traditional geologic map products and Arc/Info format geospatial databases. Furthermore, the traditional geologic map products (map sheets and pamphlets) can be obtained either as paper or as digital plot files.
  3. What legal disclaimers am I supposed to read?
    Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this publication has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 13-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

This page is <https://geo-nsdi.er.usgs.gov/metadata/map-mf/2403/metadata.faq.html>

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