HART, Mich. (AP) — A human jawbone with more than a dozen teeth has been discovered in Silver Lake in Michigan’s northern Lower Peninsula.

“It looks very old, maybe even ancient,” Oceana County Sheriff Craig Mast told MLive.com.

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The jawbone was found Sunday when someone stepped on it while removing a dock from the lake. It has been sent to anthropologists at Michigan State University for analysis.

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No other bones were found.

The county has some missing person cases. But the sheriff said the age of the jawbone probably doesn’t fit those investigations.

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