When hit by high-velocity water,ROCK has a chance to turn into STNE or SAND
erosion
Comments
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Meawgod: Explain the sand then.
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@Meawgod see the ROCK wiki page.Besides,ROCK breaks at 120 pressure so it can't happen.
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actually, the only reason it turns into STNE is due to the pressure, and not the high velocity water (it only erodes into sand, STNE is from pressure)