Scientists Study Michigan Land Bridge

(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 to Goderich, Ontario - a distance of about 125 miles - and an underwater forest of petrified trees in Lake Huron.

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<p><a href="http://www.physorg.com/news85724372.html">Scientists Study Michigan Land Bridge</a></p> <p>(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 to Goderich, Ontario - a distance of about 125 miles - and an underwater forest of petrified trees in Lake Huron.</p>