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Author Question: What is the difference between an earthquake's focus and its epicenter? What will be an ideal ... (Read 20 times)

cartlidgeashley

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on: Jul 16, 2018
What is the difference between an earthquake's focus and its epicenter?
 
  What will be an ideal response?

Question 2

Explain a hypothetical example in which the oldest rock exposed in a deep canyon is not at the bottom of the canyon.
 
  What will be an ideal response?


Tonyam972

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

The focus is the location of an earthquake within Earth. The epicenter is the point on the surface directly above the focus.

Answer to Question 2

Because magma moves up from below and is younger than everything it intrudes, it can be lower than rocks it intrudes. When a sill or pluton intrudes into its country rock, it's younger than the rocks that were present on top.


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