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    • Alamagan Volcano - map unit polygons

    Metadata Updated: January 21, 2026

    Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak reaches above sea level, with subaerially-exposed volcanic deposits dating back through the Holocene to the late Pleistocene. These feature data represent such deposits and other geologic features of Alamagan Volcano, describing its interpreted eruptive history.

    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 12, 2026
    Metadata Updated Date January 21, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 12, 2026
    Metadata Updated Date January 21, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_5f31950982ceae4cb3caec8a
    Data Last Modified 2024-01-18T00:00:00Z
    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
    Datagov Dedupe Retained 20260120204141
    Harvest Object Id 0403f5ad-459f-49ea-ac93-9f96c5e51f71
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": 145.814501, 17.579344, 145.814501, 17.621381, 145.852417, 17.621381, 145.852417, 17.579344, 145.814501, 17.579344}
    Source Datajson Identifier True
    Source Hash 50ce70b01a049539ab810618984d5c55d74fe6ac3bb94059dab176e51903bad3
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": 145.814501, 17.579344, 145.814501, 17.621381, 145.852417, 17.621381, 145.852417, 17.579344, 145.814501, 17.579344}

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