Wednesday, June 3, 2009

Scarbourgh Bluffs



The Scarbourgh Bluffs are a set of cliffs that run 14 kilometres on Lake Ontario. The can reach as high as a seven story building.




In the 1940's cottages were built there and the cliffs have been eroding ever since. In the 1970's people really started to worry when a 6 metre chunk fell of the cliffs.




Recently (Summer 2008) so much of the Bluffs fell off that it took with it one quater of someones cottage.


This is caused by erosion. The type of erosion shown here is probably Freeze-Thaw weathering. This is when water gets into cracks in rocks and freezes. When water freezes it expands and the force of the ice makes the crack bigger. Eventually the crack gets SOOOOO BIGGG that part of the rock breaks off.

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