Global Volcanism Program
The andesitic-dacitic Mount Adams stratovolcano is second in volume only to Mount Shasta in the Cascade Range. The volcanic complex is elongated along a NNW-SSE line, and includes more than 60 flank vents over 200 km2. Volcanism began about 940 ka, with three main cone-building stages occurring at about 500, 450, and 30 ka. It was active throughout the Holocene, producing two dozen minor explosive eruptions from summit and flank vents. Six Holocene lava flows are located on the flanks between 2,100 and 2,600 m elevation. The most voluminous Holocene lava flows, some of which traveled 10 km or more, were emplaced between about 7,000 and 4,000 years ago. The latest eruption about 1,000 years ago produced a minor tephra layer and possibly a small lava flow down the E flank.
Global Volcanism Program
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Global Volcanism Program
Nyamuragira Waterfall, Lake nicaragua, Nicaragua
Scientists at Work: Studying Volcanic Eruptions—When, How Big, and
Global Volcanism Program - Report from the Bulletin of the Global
Global Volcanism Program - Mistranslation Tuesday: “The next slap
Global Volcanism Program
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GLOBAL VOLCANISM PROGRAM -VOLCÁN PACAYA
Global Volcanism Program
Global Volcanism Program
