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Author Question: List the intrusive igneous textures below. Phaneritic, aphanitic, glassy, pyroclastic, pegmatitic ... (Read 87 times)

OSWALD

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on: Jul 16, 2018
List the intrusive igneous textures below. Phaneritic, aphanitic, glassy, pyroclastic, pegmatitic
 
  What will be an ideal response?

Question 2

Why would rhyolite deposits be less common than granite deposits?
 
  What will be an ideal response?


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raili21

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

Answer: Phaneritic and pegmatitic

Answer to Question 2

Answer: Felsic magmas are very viscous, which makes them more likely to remain below the surface and cool intrusively than to make it to the surface. (Students may also make the argument that rhyolite is not as resistant as granite and therefore more prone to erosion.)


OSWALD

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Reply 2 on: Jul 16, 2018
Wow, this really help

xiazhe

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Reply 3 on: Yesterday
Excellent

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