Northwest Territories Photos, Stock Photos of Canada, Yellowknife, Inuvik, Aurora Borealis, Northern Lights, Artic Circle pictures, NWT History, Pictures Canada - PhotosCanada.com Gallery

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Alexandra Falls, Twin Falls Gorge Territorial Park, Northwest Territories, Canada 27

Alexandra Falls, Twin Falls Gorge Territorial Park, Northwest Territories, Canada 27

Description : What do all the waterfalls of the Waterfalls Route have in common? We have to step back 360 million years, to the Devonian geological era, for an answer. At that time, this part of Canada was located much closer to the equator that today. Continental drift has caused it to move north since that time). The land here was at the edge of a large ocean. Together with a tropical climate, the conditions were right for the formation of vast reefs, extending for hundreds of kilometres parallel to the shoreline, very similar to those found at the Great Barrier Reef of Australia today. The reef accumulated over millions of years as a limestone ridge just below sea level, formed from the remains of the creatures living on it. Those creatures may now be found as fossils, including corals, crinoids and brachiopods.

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