Which mechanism causes crustal thickening when thrust faulting occurs in collisional mountain belts?

💡 Explanation

When thrust faulting happens in mountain collisional zones, imbricate thrusting causes duplication of rock sequences because repeated faulting stacks rock units on top of each other, thickening the crust. Therefore, stacking of rock layers results, rather than folding, rebound, or lateral escape, which require different geologic processes or fault orientations.

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