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Author Question: The volcanic islands visible here formed as a result of a mantle plume. Researchers working on ... (Read 46 times)

jilianpiloj

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on: Jul 16, 2018
The volcanic islands visible here formed as a result of a mantle plume.
 
  Researchers working on these volcanic islands have collected basalt samples for potassium-argon dating to determine when these islands formed Volcanic Island A has been dated to 7.6 million years ago. Volcanic Island C dates back to 3.4 million years ago and is 200 km away from A. Using the equation Rate = Distance/Time, calculate the rate of plate motion for this region.
  A) 4.2 km/million years
  B) 47.6 km/million years
  C) 102.3 km/million years
  D) 26.3 km/million years

Question 2

________ weathering is when physical forces break solid rock into smaller sediments.
 
  A) Mechanical
  B) Chemical
  C) Spheroidal
  D) Differential


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jessofishing

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: A


jilianpiloj

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Reply #2 on: Jul 16, 2018
Thank you :)


jessofishing

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Reply #3 on: Jul 16, 2018
Happy to help you


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