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Summary
Welcome to the land of fire and ice. The earth{u2019}s tremendous forces have made Yellowstone and Grand Teton National Parks a volatile landscape. The parks bear the marks of ancient seas, volcanic heat, tectonic upthrusting, and ice scouring. Even today, they shake and roar. In Yellowstone National Park, rumblings of a supervolcano boil to the surface{u2014}spewing, spitting, oozing, and bubbling. Steam rolls from vividly colored pools, muddy cauldrons...