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Author Question: The Appalachian Mountains of the eastern United States and Canada contain outcrops of a lot of ... (Read 22 times)

saliriagwu

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on: Jul 16, 2018
The Appalachian Mountains of the eastern United States and Canada contain outcrops of a lot of metamorphic rocks.
 
  These mountains are the result of a convergent plate boundary off eastern North America during the Paleozoic Era (542 to 251 million years ago). Based on this information, you could hypothesize that the metamorphic rocks in the Appalachians were formed by:
  a. contact metamorphism
  b. hydrothermal metamorphism
  c. regional metamorphism

Question 2

The single greatest threat to irrigated agriculture is
 
  A) groundwater depletion.
  B) global warming.
  C) flooding.
  D) pollution from hydroelectric dam projects.


janeli1

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

C

Answer to Question 2

A


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