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Author Question: What types of geologic evidence support the Snowball Earth model for the Late Precambrian ... (Read 44 times)

Mr. Wonderful

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on: Jul 14, 2018
What types of geologic evidence support the Snowball Earth model for the Late Precambrian glaciations?
 
  What will be an ideal response?

Question 2

A La Nia tends to encourage dry conditions in which of these areas?
 
  A) The southern United States
  B) Pacific Northwest of the U.S.
  C) Indonesia
  D) South Asia


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gcook

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Reply #1 on: Jul 14, 2018
Answer to Question 1

Paleomagnetic evidence indicates that glaciers existed at or near the equator during this time. Additionally, banded iron formations indicate an anoxic deep ocean, which could have resulted from a separation of the ocean from the atmosphere resulting from the ice, and the placement of cap carbonates above glacial layers agrees with the CO2 build-up that could have been the means of escape from this Snowball Earth episode.

Answer to Question 2

Answer: A


Mr. Wonderful

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Reply 2 on: Jul 14, 2018
Thanks for the timely response, appreciate it

mcarey591

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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