Which option best describes the direction of the eruption of Mount St. Helens and the cause of this action, according to Figure 15.24 in your textbook?
A) Magma pressure built up and caused a vertical eruption of magma and ash.
B) A rock slide released pressure on the magma, causing a horizontal eruption.
C) An earthquake sheared off part of the mountain, causing a horizontal eruption.
D) An earthquake opened a vent in the top of the mountain, releasing pressure on the magma and causing a vertical eruption.
Correct Answer:
Verified
Q16: Which of the following terms is not
Q17: Which of the following landslides was partly
Q18: Which is not a factor that contributes
Q19: Figure 15.11 Q20: Which two main factors determine the resisting Q22: Volcanic eruptions can trigger lahars that may Q23: Where would you expect the thickest regolith? Q24: Resisting strength is greater when Q25: Where do the largest debris flows and Q26: What was the motivation for production of
A)
A) bedding planes
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