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Just how long has the Yellowstone Hotspot been around? Release Date:
February 1, 2021
The Yellowstone hotspot the source of heat that powers Yellowstone’s vast volcanic system has long been thought to have initiated about 17 million years ago. A growing volume of evidence, however, suggests that it has been around much longer.
Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week s contribution is from Michael Poland, geophysicist with the U.S. Geological Survey and Scientist-in-Charge of the Yellowstone Volcano Observatory, and Vic Camp, Lecturer with the Department of Geological Sciences at San Diego State University.
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IMAGE: The break in slope is coincident with a discontinuity representing a regional three- to five-million-year hiatus separating two distinct styles of volcanic activity in the Cascadia backarc region. The lower. view more
Credit: Victor Camp and Ray Wells
Boulder, Colo., USA: The Yellowstone hotspot is well known for generating supereruptions in the geologic past that are far more explosive than historic examples. The origin and sustained longevity of the hotspot is less understood but is focused on two competing models, where the ascent of hot mantle is derived from either a deep-seated mantle plume or a shallow mantle source.