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Petoskey State Park: A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

In the Paleozoic Era, roughly 400 million years ago, Michigan wasn’t the chilly northern state we know it as now. It was somewhere near the equator and it was covered in a shallow, tropical sea, complete with ancient marine life.

Now, Petoskey State Park on the shore of Lake Michigan holds some of the only reminders that the Midwestern state was once an ocean. When Earth’s tectonic plates shifted and created the North American Continent out of this watery ecosystem, some of the coral life residing there came along for the ride. READ MORE


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