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How was niagara falls formed?

Niagara Falls was formed 12,000 years ago when melting glaciers began to form the large freshwater lakes now known as the Great Lakes. The water in Lake Erie ran downhill toward Lake Ontario, forming a river. This river crosses a ridge known as the Niagara Escarpment. The area where this river falls over the cliffs of the Niagara Escarpment is known as Niagara Falls.
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How was niagara falls formed?
Niagara Falls is on of nature's greatest wonders. These gigantic waterfalls were formed 10,000 years ago when the last glaciers were retreating north. As the glaciers moved, they exposed cliffs at Niagara and allowed water to flow from Lake Erie into  wiki.answers.com
How Was Niagara Falls Created?
Niagara Falls is located in western New York state and southeastern Ontario, Canada. There are falls on both sides of the Niagara River, in Canada as well as the United States. The Canadian Horseshoe Falls plunge 170 feet down to the Maid of the Mist  www.ehow.com
How to Fly to Niagara Falls.
1. Know the four airports that serve the region: Toronto Pearson International Airport (YYZ) about 1.5 hours to the north. Hamilton International Airport (YHM) about 1 hour to the north. Buffalo Niagara International Airport (BUF) about 30 minutes to  www.wikihow.com
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