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An erratic is a boulder transported and deposited by a glacier having a lithology different than the bedrock upon which it is sitting. Erratics are useful indicators of patterns of former ice flow.

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2 comments

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    • photo of LittleMAbbey
    • Thank you for this series. It was both interesting and informative. You have some good shots here.

    • said LittleMAbbey

    • 2008.01.07 at 07:42:27 PST
    • photo of anonneymouse1
    • It certainly gives you an idea of the forces of nature. For that huge rock to be moved would take lots of force for sure. Interesting information, thanks.

    • said anonneymouse1

    • 2008.01.07 at 05:31:08 PST

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