EESA06H3 Lecture : eesa06 assignment.doc
11 Mar 2012
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Eesa06 assignment: niagara falls is located between the canadian ontario province and usa new york state borders. Niagara falls formed by wisconsin glaciations during the last ice age. Niagara falls is one of the most powerful waterfalls in the world. Niagara fall is used for its hydroelectric power source since the 20th century. Niagara falls is formed by wisconsin glaciations as it was dug by a continental ice sheet drove that through the area. Great lakes flew into niagara river when ice melted which made the topography rearranged across niagara escarpment. The rocky bed did not erode evenly because of three major rock formations. The top hard rock is made of limestone and dolostone , limestone is resistant to erosion. Top rock eroded more slowly than below materials. Below the top hard rock, lies the weaker rochester formation which made of mainly shale. The river eroded the weaker layer countless times and finally carving out the fall.
