• @[email protected]
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    21
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    1 year ago

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

      • @CitizenKong
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        81 year ago

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

        • @HonoraryMancunian
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          21 year 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.