The main hazard of an eruption that forms a large caldera is
A. hot fragments thrown a short distance from the volcano.
B. burning, building collapse, and suffocation from an eruption column and pyroclastic flows.
C. destruction by moderately fluid lava flows that can flow far from the volcano.
D. volcanic mudflows and landslides.
Answer: B
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What is a typical residence time for a stream in Ohio?
A. 1 hour B. 1 day C. 1 week D. 1 month
A laboratory analysis of index minerals in a metamorphic rock indicates that temperature and pressure were decreasing as a specific mineral was growing. Why would the conditions for mineral growth change?
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The Cascade Range volcanoes
A. are now expected to become extinct as they cool. B. pose little threat, as their eruptions are typically quiet ones. C. sit above a subduction zone. D. All of the choices are correct.