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Author Question: Why is gabbro considered a coarse-grained mafic rock? A) It contains a lot of silica. B) It is ... (Read 88 times)

APUS57

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on: Jul 16, 2018
Why is gabbro considered a coarse-grained mafic rock?
 
  A) It contains a lot of silica.
  B) It is extremely rare.
  C) It contains a lot of feldspar.
  D) It contains a lot of magnesium and iron.

Question 2

A scientist identifies a rock sample as very rare. Why did he do so?
 
  A) He observed that the rock is fine grained and has a lot of silica, making it mafic.
  B) He observed that the sample is fine grained and has very little silica, making it ultra-mafic.
  C) He observed that the rock is coarse grained and has a lot of silica, making it ultra-mafic.
  D) He observed that the rock is fine grained and has very little silica, making it felsic.


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phuda

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

Answer: D

Answer to Question 2

Answer: B


APUS57

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Reply #2 on: Jul 16, 2018
Thank you


phuda

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Reply #3 on: Jul 16, 2018
No problemo


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