A more humid climate would increase the rate of weathering and erosion, leading to more rounded landscape features.
If the climate of the Grand Canyon region became more humid, the rate of weathering and erosion would most likely increase, and the landscape features would become more rounded.
Humid conditions accelerate chemical weathering processes like hydrolysis and oxidation, leading to faster erosion rates. The increased moisture content softens rocks, making them more susceptible to erosion, resulting in rounded landscape features.
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