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Niagara Falls-USA |
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Niagara Falls were created
by the recession and melting of a mammoth ice sheet. As the ice
retreated some 50,000 years ago the land rose behind it, forming such
ridges as the Niagara Escarpment. The melting ice formed a vast lake
in what is now the lake Erie, the lake overflowed about 12,000 yeas
ago, creating Niagara Falls.
The falls originally formed 7 miles north in what is now Lewiston. Due
to erosion, they are currently about midway between lakes Erie and
Ontario on the Niagara River, a 37-mile-long strait that is bisected
by the international boundary. The cities of Niagara Falls, N.Y., and
Niagara Fall Ontario, are connected by bridges across the river.
Over the last century the American Falls has undergone a dramatic face
lift due to natural forces of erosion. The natural bedrock is composed
of soft shale and limestone. Over the years the continual flow of
water causes large sections of bedrock to fall and remain at the base
of the cataracts. Geologists predict that eventually the American
Falls will transform into a succession of descending rapids. The
diversion of water above the falls has slowed the forces of erosion.
It is estimated that 75,000 gallons of water flow over the American
Falls each second, amounting to only 10% of Niagara's total water
flow.
No one has ever dared to conquer the American Falls in a barrel. All
daredevil activities have always concentrated on the Canadian
Horseshoe Falls because it has a larger water flow and fewer rocks at
its basin.
In 1895, the world’s first commercial hydroelectric plant was built at
the falls. The Niagara Power Project opened in 1961 with 13 generators
and a total installed power of 2,190,000 kilowatts, one of the largest
hydroelectric facilities in the world. We visited the Niagara Power
Plant and Niagara Falls on September 8-9, 2001.
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In the picture on
the left: Dritan (Albania), Nuntaga (Thailand), Sayra
(China), Sibisi (South Africa), Tuti (Indonesia), Jane
(Uganda), Me, Athith (Laos), Berhane (Eritrea). In the picture
on the right: some tourists delighted with the spectacular vista of
natural wonder of beauty and majesty; in the background one bridge
connecting the US and Canada. |
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