Rock type that undergoes lots of heat/pressure (marble, gneiss)?
or:Rock type that undergoes lots of heat/pressure (marble, gneiss)?or:Your question does not suggest any particular answer. What do you mean by \"und
or:Rock type that undergoes lots of heat/pressure (marble, gneiss)?
or:Your question does not suggest any particular answer. What do you mean by \"undergoes\"? Does that refer to its formation or its end use?
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