Physical Geography: Volcanoes of the United States (2000)

From Mauna Loa in Hawaii to California's Mount Lassen and Washington's Mount Saint Helens, the United States is a surprising hotbed of volcanic activity. This educational DVD explores the country's best-known active and dormant volcanoes. The lessons here describe the inner workings of volcanoes; explain the geological forces that create these impressive but dangerous peaks; and define the different types of volcanoes.