Yellowstone National Park - Steam Vents, Mud Volcanoes, Volcanic Spring Pools
June 22nd 2017 The main area (30 by 40 mile) of Yellowstone sits over an old volcano (caldera). The magna chamber below is close to the surface (3-8 miles underground). Water from the mountains melting snow sinks below ground and through cracks in the rock feed the over 10,000 geysers, steam vents, volcanic hot springs and mud volcanoes. There are quite a few locations in the park to view them.
Hot Springs h
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