L' escarpment of the Niagara starts in Watertown, New York, the United States and finishes on l' Manatoulin island in the province of l' Ontario, Canada. It is 1609 km length and is the edge surmounted d' a maritime very old bottom. Throughout its length, of Hamilton, in Ontario with Watertown, New York, the beaches of l' escarpment of 183 meters (600 feet)  altitude with 189 meters (620 feet) d' altitude.the escarpment of the Niagara is the ultimate reason of the falls of the Niagara was been born.
}Without l' escarpment of Niagara Falls May ever which been able to materialize. After d' million; years, l' escarpment of the Niagara continues with s' to erode, in southern direction. L' escarpment of the Niagara was formed and existed before the glaciations. The ground which is from now on the South of l' Emerged Ontario of the sea of  paleozoic era, at least 245 d' million; years or more. L' Ordovician and Silurien rocks of l' escarpment of the Niagara are found oldest in the Niagara going back to 430 - it ya 415 years million. escarpment is not a line or a fault line of the Rift, but was created by l' erosion. It s' d' acts; a cuesta ".

Smaller Onondega escarpment s' d' extends; is - with l' west is along northern bank of the lake Érié. Composed of Onondega calcareous course rock, this escarpment crosses Buffalo, New York and Fort Erie, to Ontario. This escarpment is more visible with l' is of Buffalo, but s' raise seldom more than 10 meters. Important ruptures in l' Onondega escarpment allowed l' water of the lake Érié of s' to run out in the low grounds of the marsh Wainfleet 10.500 - 11.000 years and still 4,000 - it ya 5.000 years during the periods when the level d' water in the basin of the lake Érié was much higher of the surge of water of glacial lake Agassiz.
D' other physical pauses in this escarpment can be found in Lowbanks and of l' motorway # 58 in Port Colborne. Between l' escarpment of the Niagara and l' escarpment of Onondega is relatively flat and badly drained hollows called the Tonawanda plain.

It is said that the Earth was created it ya 4600 d' million; years. Since this time, the forces of nature were d' creation; a masterly work of l' evolution of the terrestrial and marine landscapes never known under the name of the Niagara. It ya of the glosses, the area of the Niagara, the bottom d' a tropical sea old salt water.
Old specimens are discovered aujourd' today very deeply in the ground of the Niagara which is still aujourd' today is with the bottom of our large oceans. Approximately 65 d' million; years, at the end of the Cretaceous and the beginning of the tertiary period, the scientists affirm that l' giant asteroid enters in collision with the Earth the field of the peninsula of Yucatan to Mexico.
This collision involved an enormous quantity of remains is propelled in l' atmosphere with l' scale of the whole world which caused a radical change in the climate and led to l' extinction of the dinosaurs and many other forms of life. This event continues d' to be re-examined and discussed and will continue d' to be discussed in l' future, however it ya little doubt that the climate made a radical change at one time of l' Old of Ice.