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Turning Back The Clock 10,000 Years (Great Lakes)
South Bend Tribune ^ | 12-21-2006

Posted on 12/21/2006 2:45:15 PM PST by blam

December 21. 2006 6:59AM

Turning back the clock 10,000 years

Scientists explore land bridge, petrified trees in Lake Huron.

PONTIAC, Mich. (AP) -- 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, Mich., 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.

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, Mich., 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. Americans Indians lived near these sinkholes because they provided water, which attracted game, he said.


TOPICS: News/Current Events; US: Michigan
KEYWORDS: archaeology; catastrophism; godsgravesglyphs; greatlakes; lakehuron; petrified
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1 posted on 12/21/2006 2:45:16 PM PST by blam
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To: blam
Most folks don't know that Michigan has more miles of shoreline than the entire Left coast.

First time viewers often do the taste test for salt thinking they can't possibly be lakes.


2 posted on 12/21/2006 2:53:57 PM PST by ASA Vet (The WOT should have been over on 9/12/01.)
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To: blam
Lake levels were a lot lower back then and GLOBAL WARMING (GASP!!!!!!!) caused CATASTROPHIC inundations of sensitive habitats.

All without any action by man.

Amazing.

3 posted on 12/21/2006 2:55:54 PM PST by PeterFinn (B’fhearr Gaeilge briste na Béarla cliste.)
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To: ASA Vet
Our company in Chicagoland hosts many first time visitors from California.

Reaction: It's a lake?

4 posted on 12/21/2006 2:57:55 PM PST by HoosierHawk
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To: HoosierHawk
I've taken several dry land folks to the lakes. Same reaction as you describe.
20% of the worlds fresh water in in our lakes.
5 posted on 12/21/2006 3:02:27 PM PST by ASA Vet (The WOT should have been over on 9/12/01.)
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To: ASA Vet
We do love our lakes.

Image Hosted by ImageShack.us
6 posted on 12/21/2006 3:06:24 PM PST by cripplecreek (Peace without victory is a temporary illusion.)
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To: HoosierHawk
Our company in Chicagoland hosts many first time visitors from California.

Reaction: It's a lake?

---
Tell them the name the early French explorers gave it was Mer D'Aley.

See how fast they catch on.
7 posted on 12/21/2006 3:15:47 PM PST by Cheburashka ( World's only Spatula City certified spatula repair and maintenance specialist!!!)
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To: Cheburashka

As one who was born and raised in Mitten-gan and now resides in suburban Chicago...

THAT's funny!


8 posted on 12/21/2006 3:24:45 PM PST by Cletus.D.Yokel (I'll be retiring in SW Mittenland but, it's gonna be a while.)
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To: blam
Lake Superior has always given me the creeps long before the "The Edmund Fitzgerald"
9 posted on 12/21/2006 3:26:30 PM PST by Kimmers
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To: zot

Great lakes homey ping


10 posted on 12/21/2006 3:28:20 PM PST by GreyFriar ( (3rd Armored Division - Spearhead))
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To: GreyFriar
Back atchya, sir. Of course you know that General Custer was a Michigander.
11 posted on 12/21/2006 4:02:55 PM PST by Thebaddog (Labrador Retrievers are the dog's dog)
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To: Thebaddog
And Fort Custer is a swampy mess except the higher ground which is full of briers, ticks, and sand.
Perfect for crawling around playing weekend warrior. Did a little OCS there.
WW II barracks of course.
12 posted on 12/21/2006 4:33:33 PM PST by ASA Vet (The WOT should have been over on 9/12/01.)
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To: ASA Vet
Those WWII barracks are still there now -- I stay in them regularly.
13 posted on 12/21/2006 4:37:01 PM PST by 68skylark
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To: PeterFinn
Re: All without any action by man.

Sorry old sport, but it says above, "Americans Indians lived near these sinkholes..."

Yep... Those galled danged Native Americans did it!

Guess old Algore will soon be calling for all the ancient Native Americans to be dug up and run through wood chippers...
14 posted on 12/21/2006 4:43:33 PM PST by Bender2 (I am off politics until Nancy moves to Tehran... There to be taken straight to the ever after!)
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To: ASA Vet

Did you see the article posting about the Great Lakes 10,000 years ago? Very interesting.


15 posted on 12/21/2006 6:00:00 PM PST by Thebaddog (Labrador Retrievers are the dog's dog)
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To: GreyFriar

Thanks for the ping. A petrified forest under water is very interesting. Maybe the land in that area rebounded after the glaciers melted at the end of the last ice age and then settled down again more recently.

It still seems amazing to me that the Great Lakes drain into the Atlantic via the St. Lawrence River, instead of into the Gulf of Mexico via the Mississippi River.


16 posted on 12/21/2006 7:01:30 PM PST by zot (GWB -- the most slandered man of this decade)
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To: Thebaddog

Yes it's the one we're on. haha.


17 posted on 12/21/2006 7:35:12 PM PST by ASA Vet (The WOT should have been over on 9/12/01.)
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To: zot

Lake Michigan drains a little into the Mississippi now. Engineers reversed the flow of the Chicago River & it became the Chicago ship & sanitary canal. You can guess the sanitary part.


18 posted on 12/21/2006 7:36:06 PM PST by Cold Heart
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To: ASA Vet


Frooze my nose visiting St Joe's.

Merry Christmas!

19 posted on 12/21/2006 7:45:35 PM PST by BIGLOOK (Keelhauling is a sensible solution to mutiny.)
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To: Cold Heart

Yes, I know about the Chicago River and ship and "sanitary" canal. The engineers didn't have to tunnel or dig very deep, so I'm amazed nature didn't do that. There is just a small rise of ground along the Great Lakes that keeps them flowing east instead of south. If there had been even one significant breach at any time since the lakes were formed, the lakes would have dug their own canal to the Mississippi, or more likely, to the Ohio River.


20 posted on 12/21/2006 10:32:38 PM PST by zot (GWB -- the most slandered man of this decade)
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