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About 500,000 tons of sediment are eroded from the Grand Canyon every day.

Wind, water, and gravity are constantly widening the canyon. What is making
the canyon deeper?
A. Mass movements
B. Coastal erosion
C. Wind erosion
D. River action

User TMtech
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1 Answer

6 votes
D. River action because the Colorado River erodes away the bottom of the Grand Canyon, thus making it deeper.
User Lpg
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