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Author Question: Which option best describes the direction of the eruption of Mount St. Helens and the cause of this ... (Read 44 times)

CQXA

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on: Jul 16, 2018
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.

Question 2

Put the following events in order from those that occur with the greatest driving force to those that occur with the least driving force and/or have the least effect on hillside stability.
 
  1. erosion 2. magma intrusion 3. volcanic eruption 4. liquefaction 5. earthquake
  A) 1, 2, 3, 5, 4
  B) 2, 1, 4, 5, 3
  C) 3, 4, 5, 2, 1
  D) 4, 5, 2, 3, 1


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dyrone

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: D


CQXA

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Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it

gcook

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Reply 3 on: Yesterday
Wow, this really help

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