It's Cool to Learn About the United States: West

It's Cool to Learn About the United States: West — page 5
to People in Pullman Washington clean up ash after the violent eruption of Mount St Helens in May 1980 The Pacific Coast Range runs along North America's West Coast It includes the Sierra Nevadas Columbia Mountains and Cascades Alaske's Kenai Mountains Chugach Mountains and Yukon Ranges are also Pacific Coast Range mountains Many of these mountains are dormant or not presently active volcanoes The most powerful volcanic eruption in recent his tory was Mount St Helens in Washington After being dormant for more than 100 years the volcano erupted on May 18 1980 It was the deadliest volcanic event in O