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Which of the following was common to the eruptions of Vesuvius, Mount
Pelée and Mount St. Helens?
they are all composite volcanoes, earthquakes before
the eruption, large eruptions of ash, pyroclastic flows
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Which of the following are dangerous aspects of composite volcanoes?
pyroclastic flows, landslides and mudflows, an eruption column
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The eruption that occurred on Mount St. Helens was triggered by:
A huge
landslide caused a lateral blast that knocked down trees and buildings.
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The eruption of vast quantities of superheated steam is called a
Phreatic
explosion
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Almost all of the 25,000 people killed in the 1985 eruption of Nevado del
Ruiz in Colombia were killed by ___
A large mudflow of volcanic debris
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Which of the following is a silicate mineral? Garnet
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What type of silicate minerals is shown from this arrangement of silicon
tetrahedron?
single chains
