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Author Question: What is the role that depth can play on cooling and crystallization of igneous rocks? What will ... (Read 32 times)

roselinechinyere27m

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on: Jul 16, 2018
What is the role that depth can play on cooling and crystallization of igneous rocks?
 
  What will be an ideal response?

Question 2

Igneous rocks with an andesitic composition are found along volcanic island arcs.
 
  Indicate whether this statement is true or false.


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harveenkau8139

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

Answer: (Ignoring nucleation sites, which can speed up the formation of large crystals) The general rule of thumb is the deeper the magma, the more preexisting rock surrounds and insulates it. Because the heat is retained longer, cooling occurs at a slower rate, which allows the atoms and molecules to move around more freely and combine to produce mineral crystals. This rate of intrusive cooling produces larger, visible mineral crystals.

Answer to Question 2

Answer: TRUE


roselinechinyere27m

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Reply 2 on: Jul 16, 2018
YES! Correct, THANKS for helping me on my review

debra928

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Reply 3 on: Yesterday
Excellent

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