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This is an archive of AGU's GeoSpace blog through 1 July 2020. New content about AGU research can be found on Eos and the AGU newsroom.

Grand_Prismatic_Spring,_Yellowstone_National_Park_(3646969937)

Grand_Prismatic_Spring,_Yellowstone_National_Park_(3646969937)

Grand Prismatic Spring is the largest hot spring in Yellowstone National Park. A new study shows the presence of a thick crustal transition zone underneath Yellowstone that may control the movement of magma emerging from the Earth’s mantle.
Credit: Frank Kovalchek/Wikimedia commons