Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • Analysis for estimated percent sand in cores taken from San Francisco Bay, California, 1990-2016

    Metadata Updated: September 13, 2025

    Sediment analysis of cores collected in San Francisco Bay, San Pablo Bay, and the Carquinez Strait and Suisun Bay, California from 1990 to 2016 for percent sand. Handwritten core logs, x-radiographs, and the cores themselves, were examined for the presence of sand.

    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 September 13, 2025
    Metadata Updated Date September 13, 2025

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 13, 2025
    Metadata Updated Date September 13, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-99df34cd-4f03-49b1-8588-5a694fa6f15d
    Data Last Modified 2025-07-23T00:00:00Z
    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 eb2c9533-ed5b-4af4-8782-839618dc4b15
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -122.507046, 37.448070, -121.863877, 38.133552
    Source Datajson Identifier True
    Source Hash 42ebc22f8992dbaedf33253f1bfcb5289219b89c628503eac914b418abf4d7cb
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.507046, 37.448070, -122.507046, 38.133552, -121.863877, 38.133552, -121.863877, 37.448070, -122.507046, 37.448070}

    Didn't find what you're looking for? Suggest a dataset here.