The Rocky Mountains run about 3,000 miles, from Alaska through Canada to the state of New Mexico. They have a history built on fire and ice. A volcano under an ancient sea formed parts of these mountains more than one billion years ago. Volcanoes have erupted in and around the Rockies for millions of years since then. Today, Old Faithful, a geyser located in the Rockies' Yellowstone National Park, is a reminder of the region's fiery history. Students...
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