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    • Hydrogeologic Data Release for CVHM2: Well logs with Classification Information

    Metadata Updated: January 9, 2026

    These data encompass data classified from the borehole textures. The U.S Geological Survey (USGS) classified the Well Log Database of the Central Valley, California, 2021, into Central_Valley_Borehole_with_Lithology_Classification.csv. Lithologic log descriptions served as the basis for division into discrete binary texture classifications of either “coarse grained” or “fine grained” intervals. Values of 1 (coarse grained), 0 (fine grained) or 2 (unknown) were determined using the table found in Central_Valley_Lithology_Classifier.csv. Percent Coarse values for each well log were calculated at 15.24 m for the entire Central valley (Percent_Coarse_meters_wells.csv).

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date January 9, 2026
    Metadata Updated Date January 9, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 9, 2026
    Metadata Updated Date January 9, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_62aba69fd34e74f0d80eb4ed
    Data Last Modified 2022-10-11T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id ecfb4a20-7e0a-4a7d-8c15-5b8e332aa859
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -123.8315, 34.5199, -117.9163, 40.7486
    Source Datajson Identifier True
    Source Hash 148d8d3cb8638399c73bc5fde7fe58a7e3784b15d4110e5a5fd50b0d19ea5c14
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -123.8315, 34.5199, -123.8315, 40.7486, -117.9163, 40.7486, -117.9163, 34.5199, -123.8315, 34.5199}

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