Difference between revisions of "Chalk"
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| + | [[Image:Four of the Seven Sisters.jpg|thumb|200px|Four of the "Seven Sisters" along the [[Sussex]] coast, [[England]]]] | ||
'''Chalk''' is a white, sedimentary rock, composed of calcium carbonate. One of it's most dramatic outcrops is along the south coast of [[England]] where it forms the "white cliffs of [[Dover]]". | '''Chalk''' is a white, sedimentary rock, composed of calcium carbonate. One of it's most dramatic outcrops is along the south coast of [[England]] where it forms the "white cliffs of [[Dover]]". | ||
Revision as of 21:47, July 14, 2007
Chalk is a white, sedimentary rock, composed of calcium carbonate. One of it's most dramatic outcrops is along the south coast of England where it forms the "white cliffs of Dover".
Nowadays, chalk has been replaced by other substances. For example, the "chalk" that is used in blackboard writing or in sidewalk chalk is actually gypsum.