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Author Question: Niagara Falls were formed ________. A) by humans damming of the St. Lawrence River B) during ... (Read 90 times)

shofmannx20

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Niagara Falls were formed ________.
 
  A) by humans damming of the St. Lawrence River
  B) during Precambrian time approximately a billion years ago
  C) so long ago that the river's knickpoint is now gone
  D) after the retreat of the Pleistocene ice sheets a few thousand years ago
  E) after a series of spectacular earthquakes which are still helping the falls evolve

Question 2

Over time, which of the following has happened to Niagara Falls?
 
  A) They have become rapids.
  B) They have migrated several kilometers upstream.
  C) They have migrated several kilometers downstream.
  D) They have drained away most of Lake Ontario's water.
  E) They have evolved into the world's most famous example of stream capture.


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jaymee143

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shofmannx20

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Reply 2 on: Jul 13, 2018
Excellent


sultana.d

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

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