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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]]".