Which of the expressions are equivalent to the expression above? Mount Rainier is a volcano in the Cascade Volcanic Arc that consists of lava flows, debris flows, and pyroclastic ejecta and flows. Its early volcanic deposits are estimated at more than 840,000 years old. The present cone is more than 500,000 years old. The volcano is highly eroded, with glaciers on its slopes, and appears to be made mostly of andesite but has basaltic and granitic layers. Although Mount Rainier is now dormant, an eruption could be deadly for all living in areas within the immediate vicinity of the volcano because of the massive amounts of ash that would come blasting out of the volcano into the atmosphere.

Lahars from Rainier pose the most risk to life and property. According to the United States Geological Survey (USGS), about 150,000 people live on top of old lahar deposits of Rainier. A large mudflow would completely destroy the surrounding area and may destroy parts of downtown Seattle, and cause tsunamis in Puget Sound and Lake Washington. Rainier is also capable of producing pyroclastic flows and expelling lava.

If Mt. Rainier were to erupt as powerfully as Mount St. Helens did in its May 18, 1980 eruption, the effect would be cumulatively greater, because of the far more massive amounts of glacial ice locked on the volcano, the heavily populated areas surrounding Rainier, and the simple fact that Mt Rainier is a much bigger volcano, almost twice the size of St. Helens. Because of this, Mount Rainier is currently listed as a Decade Volcano, or one of the 16 volcanoes with the greatest likelihood of causing great loss of life and property if eruptive activity resumes.

26. What type of volcano is Mt. Rainier? Use at least 3 sources of evidence from the text to support your conclusion.