Learn more about the time period that took place 488 to 443 million years ago. 3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the ...

But 445 million years ago, in the period called the Ordovician, the region looked very different. Much of what is now Saskatchewan and Manitoba in Canada, along with Montana and the Dakotas in the ...