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[–] MrPim 0 points 2 points (+2|-0) ago  (edited ago)

Forgive this URL

https://www.bing.com/images/search?q=stone+staircase+worn+by+feet&FORM=HDRSC2&PC=U316

I wanted to give you multiple examples. Those are stone staircases worn by feet. Over a couple hundred years. Feet may be slightly more abrasive than water but the water had a Lot more time.

And there's also at least some wind erosion in the canyon