Chalk Cliffs

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Information about Chalk Cliffs
Education

Published on October 5, 2008

Author: GeoDave

Source: authorstream.com

Chalk cliffs : Chalk cliffs View along the Seven Sisters in East Sussex (the River Cuckmere in the foreground) Slide 2: 150 metres (500 feet) The layer of chalk forming these cliffs is very thick (there is more hidden underground) Slide 3: Under a microscope you can see that chalk is made from the shells of microscopic sea creatures. Chalk is made of calcium carbonate Sometimes, larger fossils are found – these prove that the chalk was formed under the sea! Slide 4: Even away from the coast, you can see the chalk just underneath the thin soil. Artists often carve images on the chalk hills. Slide 5: The sea dissolves the chalk, particularly along any cracks to form deep caves. Slide 6: Sometimes, whole sections of the cliff collapse very suddenly Slide 7: Checking on the chalk cliff – an interesting job! Slide 8: Is chalk useful? What is it being used for in these photos?

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