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Author Question: What is one possible explanation for the crustal subsidence that created extensive areas of ... (Read 35 times)

ap345

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on: Jul 15, 2018
What is one possible explanation for the crustal subsidence that created extensive areas of downwarping such as in Michigan and Illinois?
 
  A) Cessation of compression along a convergent plate boundary
  B) Cessation of upwelling from a mantle plume
  C) Cessation of subduction, with detachment of the descending slab, creates a downward pull in the mantle
  D) The crust is extended to maintain a convergent plate boundary where the descending plate is sinking

Question 2

Which of the following is believed to be responsible for uplifting southern Africa 1,500 meters higher than what would be expected for a stable continental platform?
 
  A) Microcontinents
  B) Isostacy
  C) Orogenesis
  D) Superplume

Question 3

The ________ Orogeny is one of three events that formed the modern Appalachian Mountains.
 
  A) Taconic
  B) Laramide
  C) Tibetan
  D) Cordilleran


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dawsa925

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

Thanks for your help Worked like a charm.

Answer to Question 2

How great was that.Thank you so much.

Answer to Question 3

Answer: A


ap345

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Reply 2 on: Jul 15, 2018
:D TYSM

samiel-sayed

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

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