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Worm tubes ? in my backyard stream

Hello, I have a small stream in my backyard (about 10' wide). I was out there today seeing what I could see & I found these 1 1/2 inch long hollow tubes. It looked as if they were made out of small pebbles cemented together. Any idea what they could be? I live in Genesee County, MI and the stream in the Flint River watershed. Thanks for any ideas.

From Rhonda - July 24, 2008 at 08:14:52
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Message: 66779

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