What physical factors controls the state of stress in a rock that is being uplifted through the upper crust?
What will be an ideal response?
Answer: There are two important effects: The thermal and the Poisson effects, both of which tend to decrease the horizontal stress. The thermal or cooling effect is related to the cooling of rocks as they ascend. Cooling causes the rock to contract and potentially fracture.
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a. true b. false
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Answer the following statement true (T) or false (F)
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