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biscuit basin
Biscuit Basin at Yellowstone Park to Remain Closed for the Summer After Hydrothermal Explosion
The explosion was not caused by volcanic activity, according to the U.S. Geological Survey.
Hydrothermal Explosion at Yellowstone Sends Plume of Steam and Mud Into the Air
The explosions are typically the result of water flashing into steam underground: USGS.
