Great lake, photo by jpwbee.

Earlier this week mLive reported (thanks Michitwitter) that University of Michigan researchers found evidence of ancient hunters at the bottom of Lake Huron:

Using detailed government data on lake floor topography, a research vessel and a remote mini-rover equipped with a camera, scientists found what they believe are hunting pits, camps and rock structures called caribou “drive lines” on the bottom of Lake Huron.

Drive lines, also called drive lanes, are walls built of rocks that hunters used to lure caribou into ambush. A peculiarity of the deer species is that it readily follows linear cues, even though the rock walls are short enough to step over.

The structures were found on an underwater ridge that – about 9,000 years ago – was a land bridge above water. The 10-mile-wide Alpena-Amberley ridge stretches more than 100 miles from near Point Clark, Ontario, to Presque Isle.

The 1,148-foot “drive line” structure found by U-M researchers closely resembles one previously discovered on Victoria Island in the Canadian subarctic.

Click the link above for an underwater photo and be sure to check it out bigger.