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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    CGS Information Warehouse: Mineral Lands Classification

    Metadata Updated: January 23, 2026

    Mineral Land Classification (MLC) studies are produced by the State Geologist as specified by the Surface Mining and Reclamation Act (SMARA, PRC 2710 et seq.) of 1975. To address mineral resource conservation, SMARA mandated a two-phase process called classification-designation. Classification is carried out by the State Geologist and designation is a function of the State Mining and Geology Board. The classification studies contained here evaluate the mineral resources and present this information in the form of Mineral Resource Zones. 
    The objective of the classification-designation process is to ensure, through appropriate local lead agency policies and procedures, that mineral materials will be available when needed and do not become inaccessible as a result of inadequate information during the land-use decision-making process.
    For more information about MLC please visit our website.

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date January 23, 2026
    Metadata Updated Date January 23, 2026

    Metadata Source

    Harvested from State of California

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 23, 2026
    Metadata Updated Date January 23, 2026
    Publisher California Department of Conservation
    Maintainer
    Identifier 3f4fbcc2-94b9-4cde-8ba9-af6ff1cf810e
    Data First Published 2015-09-18T15:37:52.000Z
    Data Last Modified 2025-02-20T17:51:32.000Z
    Category Natural Resources
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    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 af626a6c-aa47-4889-afaf-891c3c7796d0
    Harvest Source Id 3ba8a0c1-5dc2-4897-940f-81922d3cf8bc
    Harvest Source Title State of California
    License http://www.opendefinition.org/licenses/cc-by
    Source Datajson Identifier True
    Source Hash c3cf2413273026bcb31a7d7d63910fcaae2a53115b6e5b6991c9dd211a4ba375
    Source Schema Version 1.1

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