There are glacial erratics all around manhattan.

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u/SFDukie

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r/geography

glacial erratics of

Manhattan

manhattan of

glacial erratic

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https://github.com/davepinch/pinchy.cc/blob/master/content/reddit/there-are-glacial-erratics-all-around-manhattan.md

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https://www.reddit.com/r/geography/comments/1p3w4d0/comment/nq7ez04/