Great Lakes Environmental Directory Great Lakes Great Lakes environment Great Lakes grants exotic species water pollution water export drilling environment Great Lakes pollution Superior Michigan Huron Erie Ontario ecology Great Lakes issues wetlands Great Lakes wetlands Great Lakes Great Lakes environment Great Lakes watershed water quality exotic species Great Lakes grants water pollution water export oil gas drilling environment environmental Great Lakes pollution Lake Superior Lake Michigan Lake Huron Lake Erie Lake Ontario Great Lakes ecology Great Lakes issues Great Lakes wetlands Great Lakes Resources Great Lakes activist Great Lakes environmental organizations Great Lakes Aquatic Habitat air pollution alien species threatened rare endangered species ecological Great Lakes information Success Stories Great Lakes Directory Home/News Great Lakes Calendar Great Lakes jobs/volunteering Search Great Lakes Organizations Take Action! Contact Us Resources/Links Great Lakes Issues Great Lakes News Article About Us Networking Services

Great Lakes Article:

Scientists study Michigan land bridge
Associated Press
Published on Siliconvalley.com on December 18, 2006

PONTIAC, Mich. - Scientists hope to learn more about what the Great Lakes' shorelines looked like about 10,000 years ago. They explored a limestone land bridge that went from Alpena to Goderich, Ontario - a distance of about 125 miles - and an underwater forest of petrified trees in Lake Huron.

The 2006 research, in which more than 500 dives were made, is the subject of a documentary film, "Great Lakes, Ancient Shores, Sinkholes." It premiered recently at the Cranbrook Institute of Arts in Bloomfield Hills, The Oakland Press reported in a story published Monday.

Another study is planned for 2007 and should result in a second film, "Great Lakes, Ancient Shores," said Luke Clyburn, lieutenant commander of the Great Lakes Division of the U.S. Naval Sea Cadet Corps and a Great Lakes ship captain.

"What we are learning about the Great Lakes of several thousand years ago may change the way we think of this area," Clyburn said.

Clyburn and other scientists have been filming in the Great Lakes for at least 25 years.

There is a petrified forest in 40 feet of water in Lake Huron about two miles offshore from Lexington, he said. Some of the trees have been carbon-dated to indicate they are 6,980 years old.

The Straits of Mackinac, a passage between lakes Michigan and Huron, have been spanned by the Mackinac Bridge since the mid-1950s but didn't exist several thousand years ago, Clyburn said.

"Lake Michigan was much higher than Lake Huron, and the two did not join as they do today at the straits," he said. But water from Lake Michigan seeped underground toward Lake Huron and the two bodies of water eventually became connected.

Clyburn's current film focuses on a sinkhole in Lake Huron about two miles from Alpena near Middle Island. In prehistoric times, the sinkholes were on dry land. Native Americans lived near these sinkholes because they provided water, which attracted game, he said.


 

This information is posted for nonprofit educational purposes, in accordance with U.S. Code Title 17, Chapter 1,Sec. 107 copyright laws.
For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for
purposes of your own that go beyond "fair use," you must obtain permission from the copyright owner.


Great Lakes environmental information

Return to Great Lakes Directory Home/ Site Map