U.S. archeologists find possible mastodon carving on Lake Michigan rock

TRAVERSE CITY, Mich. (AP) - They aren't certain, but underwater archeologists say they may have discovered a boulder with a prehistoric carving in Lake Michigan's Grand Traverse Bay.

The granite rock has markings that resemble a mastodon - an elephant-like creature that once inhabited parts of North America - with what could be a spear in its side, say divers who have seen it.

They came across the boulder at a depth of about 12 metres while searching for shipwrecks in June, said Mark Holley, a scientist with the Grand Traverse Bay Underwater Preserve Council.

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