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submitted 2 years ago by Facelikeapotato@lemmy.ml to c/cat@lemmy.world

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[–] Scrof@sopuli.xyz 19 points 2 years ago* (last edited 2 years ago) (1 children)

Maybe they're deep because of water erosion from rains over a thousand years, those bricks look pretty polished.

[–] Zaphod@discuss.tchncs.de 10 points 2 years ago (1 children)

I don't think the bricks are that old. Maybe a few hundred years or so

[–] CitizenKong@lemmy.world 8 points 2 years ago (1 children)

Also, wouldn't water erosion make them less deep not more, due to generally smoothing the stone?

[–] HonoraryMancunian@lemmy.world 2 points 2 years ago

Maybe water pools in them long after it dries out on the surrounding brick, but whether still water still erodes stone I don't know.