what is the holy grail of great lakes shipwrecks
Le Griffon In late December 2014, treasure hunting divers Kevin Dykstra and Frederick Monroe alerted media outlets that they found indisputable proof of Le Griffon's location. They happened upon the wreckage while searching the floor of Lake Michigan for Confederate gold. Evidently, they spotted the wreck in 2011, but waited until 2014 to reveal the discovery of what some call the "holy grail" of Great Lakes shipwrecks while they consulted experts. There are "no cables, no cabin, and no smokestacks," no mechanical devices of any kind, and a carving on the front of the ship strongly resembles 17th-century French carvings of griffins, Dykstra says. On January 2, 2015, Frederick Monroe told an interviewer for public radio that he believed Le Griffon was built in Canada, below Niagara Falls, and brought to the upper Great Lakes. He went on to say that the wreck is "the one that got in the way." Their claim was quickly debunked when Michigan authorities dove down on June 9, 2015 after receiving the coordinates to verify its authenticity. Michigan state maritime archaeologist Wayne R. Lusardi presented evidence that the wreck was, in fact, a tugboat due to its 90-foot (27Â m) length and presence of a steam boiler.[3]
Pluvial lake Several pluvial lakes formed in what is now the southwestern United States during the glaciation of the late Pleistocene. One of these was Lake Bonneville in western Utah, which covered roughly 19,000 square miles (49,000 km2). When Lake Bonneville was at its maximum water level, it was 1,000 feet (300 m) higher than the Great Salt Lake.