Archeologist Dr. Mark Holley discovered what appears to be an underwater Stonehenge 40-feet beneath Grand Traverse Bay, which is located off Lake Michigan in Northern Michigan, and “one stone outside the circle seems to have carvings that resemble a mastodon—an elephant-like animal that went extinct about 10,000 years ago.” If the site is authenticated as remnants of an ancient culture, it would represent a fascinating and remarkable underwater archeological discovery. From NBC Chicago:
According to BLDGBLOG, in 2007, Mark Holley, professor of underwater archeology at Northwestern Michigan College, discovered a series of stones arranged in a circle 40 feet below the surface of Lake Michigan. One stone outside the circle seems to have carvings that resemble a mastodon—an elephant-like animal that went extinct about 10,000 years ago.
Archaeologists had been hired to survey the Lake’s floor near Traverse City, Michigan, and examine old boat wrecks with a sonar device. They discovered sunken boats and cars and even a Civil War-era pier. But among these expected finds was a potentially-prehistoric surprise.
“When you see it in the water, you’re tempted to say this is absolutely real,” Holley told reporters at the time. “But that’s what we need the experts to come in and verify.”

More images and information can be found at BLDGBLOG.

Mark Holley shows images of the stone, which he believes contains the image of a mastodon.
On the Net:
- Grand Traverse Bay Underwater Preserve Council
- Mastodon? Rock brings history to surface: Divers think underwater boulder has prehistoric carving of a mastodon
- Stonehenge Beneath the Waters of Lake Michigan
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