It is thought that the chalk was deposited very slowly, probably only half a millimetre a year, equivalent to about 180 coccoliths piled one on top of another. The sea bottom was made of a white mud formed from the fragments of coccoliths, which were the skeletons of tiny algae which floated in the surface waters of the sea. On a clear day you can see right across from the Dover cliffs to the cliffs on the French coast at Cap Gris Nez, proof of the continuous strata of chalk.Īround seventy million years ago this part of Britain was submerged by a shallow sea. The Cliffs have been immortalised in song, in literature and in art. Millions pass through Dover each year on their journey to or from the continent. In some places over 300 feet high, the White Cliffs are a symbol of the United Kingdom and a reassuring sight to travellers. The famous White Cliffs of Dover stand guard at the Gateway to England. Home > Information Resources > Articles & Factsheets > White Cliffs of Dover White Cliffs of Dover Discover The White Cliffs
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