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Author Question: Identify a parent rock for each of these metamorphic rocks: slate, marble, and gneiss. What will ... (Read 68 times)

asd123

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on: Jul 16, 2018
Identify a parent rock for each of these metamorphic rocks: slate, marble, and gneiss.
 
  What will be an ideal response?

Question 2

What is mineral stability? How does mineral stability change with temperature and pressure?
 
  What will be an ideal response?


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Liamb2179

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

Shale produces slate. Limestone produces marble. Very high-grade metamorphism of shale, or high-grade metamorphism of granite produces gneiss.

Answer to Question 2

Stability: the tendency of a mineral to remain the same rather than to change. Mineral stability usually varies with different temperatures and pressures, and can change to another mineral under different conditions. Aragonite can metamorphose to calcite at low pressures, and calcite metamorphoses to aragonite at high pressure. An extreme example is the diamond, which metamorphoses at very high pressures (>25 kbars).


asd123

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Reply 2 on: Jul 16, 2018
Excellent

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

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