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Why do river stones round out?

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Anonymous

16y ago
Updated: 8/17/2019

Sharp edges are knocked off by the tumbling effect created by moving water, much as a mechanical rock polisher does via a rotating drum. As more and more sharp edges are rounded, and as the rock is abraded by much smaller rock particles being transported by running water, the effect is a rounded smoothed rock surface.

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Wiki User

16y ago

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