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Author Question: Explain the difference between geologic eras, periods, and epochs. Give an example of each. What ... (Read 48 times)

go.lag

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on: Jul 13, 2018
Explain the difference between geologic eras, periods, and epochs. Give an example of each.
 
  What will be an ideal response?

Question 2

Thinking about geologic time, why is it necessary to accept the reality of an Earth that is very old?
 
  What will be an ideal response?
McKnight's Physical Geography: A Landscape Appreciation ¦ Hess, Tasa ¦ 12th Edition
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gstein359

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Reply #1 on: Jul 13, 2018
Answer to Question 1

Answer: Epochs are subsets of periods which are subsets of eras. For instance, the Pleistocene Epoch is part of the Quaternary Period, which is a subset of the Cenozoic Era.

Answer to Question 2

Answer: The geomorphic processes are mainly slow. So only through their actions over millions upon millions of years can we have the landscapes we see today.


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