The combination of silica-rich soil, high elevations, glacial deposits, and hydrothermal features creates a unique ecosystem on the Yellowstone Plateau. [6], Over the past 16.5 million years or so, this hotspot has generated a succession of explosive eruptions and less violent floods of basaltic lava. The Ural Mountains are a narrow, linear chain of mountains that trend north-south through Russia. A .gov website belongs to an official government organization in the United States. 89. The caldera measures 43 by 28 miles (70 by 45 kilometers), and postcaldera lavas spill out a significant distance beyond the caldera proper. Newly discovered Yellowstone eruption is one of 'top 5 eruptions of all Magma that encounters silica-rich continental crust on its journey upward forms a rhyolite magma chamber only 5 to 10 miles (8 to 16 kilometers) beneath Yellowstone National Park. The water circulates 1 to 2 miles (2 to 3 kilometers) underground, where it encounters hot rock above the rhyolite magma chamber. Summary of Eruption History | U.S. Geological Survey Now, the discovery of two ancient supereruptions including the single largest in the hotspot's history reveals an unexpected trend: The Yellowstone hotspot's activity may finally be waning. [5], Volcanism at Yellowstone is relatively recent, with calderas created by large eruptions that took place 2.1 million, 1.3 million, and 640,000 years ago. 12201 Sunrise Valley Drive Reston, VA 20192. If the pressure is released to a sufficient degree by some geological shift, then some of the gases bubble out and cause the magma to expand. This eruption covered roughly 8,900 square miles (23,000 square km) of what is now southern Idaho and northern Nevada making it the single largest eruption of the Yellowstone hotspot ever detected. Speedy Robo-Gripper Reflexively Organizes What Made Us Human? Wilson, J. T. A possible origin of the Hawaiian Islands. Since then the North American Plate has been moving west-southwest over the hotspot, so that a chain of explosive rhyolite volcanic centers (pink blobs) extends across the Snake River Plain to Yellowstone. Columbia River Basalt: the Yellowstone hot spot arrives in a flood of fire", "High Lava Plains Project, Geophysical & Geological Investigation, Understanding the Causes of Continental Intraplate Tectonomagmatism: A Case Study in the Pacific Northwest", "Mantle dynamics and genesis of mafic magmatism in the intermontane Pacific Northwest", "Reconstructing the ancestral Yellowstone plume from accreted", "Yellowstone in Yukon: The Late Cretaceous Carmacks Group", 10.1130/0091-7613(1996)024<0997:YIYTLC>2.3.CO;2, "Snake River Plain-Yellowstone Hot Spot Migration", "Shaded relief map of the northwestern United States", "Geodynamics of the Yellowstone hotspot and mantle plume: Seismic and GPS imaging, kinematics and mantle flow", 10.1130/0016-7606(2002)114<0367:ESVOTY>2.0.CO;2, "Crustal deformation of the Yellowstone-Snake River Plain volcanic system: campaign and continuous GPS observations, 19872004", "The Yellowstone magmatic system from the mantle plume to the upper crust", National Park Service interactive map showing trace of the hotspot over time, The Yellowstone magmatic system from the mantle plume to the upper crust, https://en.wikipedia.org/w/index.php?title=Yellowstone_hotspot&oldid=1140250712, Short description is different from Wikidata, Articles needing additional references from October 2009, All articles needing additional references, Articles needing additional references from November 2013, Creative Commons Attribution-ShareAlike License 3.0.
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