The hidden mantle flow shaping Yellowstone’s supervolcano
A sideways flow of hot mantle rock, not a deep plume rising from near Earth’s core, may be feeding one of the planet’s most closely watched supervolcanoes. That is the picture emerging from a new study of Yellowstone, where researchers built a three-dimensional model of western North America and traced how magma could form, move and collect beneath the region. Therefore, their conclusion points to a broad eastward “mantle wind” beneath the continent. This wind helps generate melt in the shallow mantle and helps shape the tilted underground system that supplies Yellowstone’s volcanism. The work, published in Science, comes from a team at the Institute of Geology and Geophysics of the Chinese Academy of Sciences. It tackles a long-running question at Yellowstone, where three caldera-forming eruptions have occurred in the past roughly 2 million years. These include the Huckleberry Ridge supereruption 2.1 million years ago and the Lava Creek supereruption 0.63 million years ago. Beneath Yellowstone For years, supervolcanoes were often pictured as holding large, long-lived magma chambers in the crust, pools of liquid melt …









