Why are sinkholes round?

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It seems every picture of a sinkhole shows a perfectly round home in the ground. I understand how sinkholes form, but why wouldn’t they also form in oblong or more abstract shapes?

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Anonymous 0 Comments

If you expand every part of a shape, it will resemble a circle more and more. If you draw an X, it’s not a circle. If you now take a slightly thicker pen and trace the X, then thicker again, eventually you will end up with something much closer to a circle than an X. As water wears down the edge of the hole more and more, it will eventually become a circle, or at least something that is close enough

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