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    Mount Roundtop

    Stratovolcano · 1,871 m · United States of America

    Mount Roundtop
    Photo: Shishaldin · CC BY 3.0 · Wikimedia Commons

    Mount Roundtop sits on the North American Plate, in a subduction zone. 1 eruption is known since the end of the last ice age, the most recent in 7,600 BCE.

    Elevation
    1,871 m
    Type
    Stratovolcano
    Tectonic Setting
    Subduction zone, continental crust
    Dominant Rock
    Rhyolite
    Plate
    North American Plate
    Country
    United States of America
    Last Eruption
    7,600 BCE
    Known Eruptions (Holocene)
    1
    Max. Explosivity (VEI)
    5

    Eruption Timeline

    Each bar is an eruption; its height shows its explosivity (VEI 0 to 8).

    7,600 BCE · VEI 5 VEI 2VEI 4VEI 6 7,600 BCE1500180019002000

    Eruption Uncertain Date

    Sources : Global Volcanism Program, 2026. Volcanoes of the World (v. 5.4.0; 7 Aug 2026), Smithsonian Institution, doi:10.5479/si.GVP.VOTW5-2026.5.4 (volcano.si.edu) · NOAA NCEI · USGS · Wikidata