Which of the following is a recognizable characteristic of recent calderas?
A. long, narrow valley
B. large, conical mountain form
C. steep-sided basin-shaped depression
Answer: C
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This defines where the motion causing an earthquake actually occurs.
This defines where the motion causing an earthquake actually occurs.
- Epicenter
- Fault plane
- Fault scarp
The main hazard of an eruption that forms a large caldera is
A) burning, building collapse, and suffocation from an eruption column and pyroclastic flows. B) volcanic mudflows and landslides. C) hot fragments thrown a short distance from the volcano. D) destruction by moderately fluid lava flows that can flow far from the volcano.
If such an isotope existed, which one would be best to use for establishing the age of an archeological site that is about 50,000 years old?
A. one with a half-life of 2,000 years B. one with a half-life of 200,000 years C. one with a half-life of 20,000 years D. one with a half-life of 2 million years
Ocean life appears to be affected by a relatively small number of variables such as temperature, density, available sunlight, available nutrients. If any one of these variables changes how do you think it might it impact the human food web?
What will be an ideal response?