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Author Question: How are oxygen isotopes used to determine ancient climate? What will be an ideal ... (Read 47 times)

Redwolflake15

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on: Jul 15, 2018
How are oxygen isotopes used to determine ancient climate? What will be an ideal response?

Question 2

Which of the major rock types were most important originally in developing the geologic time scale,
  and why? What will be an ideal response?



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Kimmy

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Reply #1 on: Jul 15, 2018
Answer to Question 1

The light isotope of oxygen, oxygen 16, vaporizes more readily than the heavy isotope, oxygen 18. As
climate warms, evaporation increases and the ratio of O-18 to O-16 becomes higher.



Answer to Question 2

Sedimentary rocks, because they follow the principles of historical geology, and they contain fossils.


Redwolflake15

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Reply 2 on: Jul 15, 2018
Great answer, keep it coming :)

raili21

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Reply 3 on: Yesterday
Excellent

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