The famous white cliffs of Dover on the coast of Dover, England, are “chalk” with streaks of black flint.
The chalk on the white cliffs of Dover is composed of millions of skeletons of very small protozoans (coral, sponges and other small sea creatures).
The white cliffs of Dover were at one time part of the ocean floor but they were raised above the sea during past geologic times.
The chalk itself on the white cliffs of Dover is very soft and easily eroded by the tidal forces. The cliff face continues to erode at an average rate of one centimeter per year.
In 1803, the British posted a military detachment on the cliffs of Dover to look out for Napoleon. He died in 1821. They stopped funding that guard unit in 1927.
For many people, the White Cliffs of Dover are a clear symbol of Britain in the way the Statue of Liberty defines America.
Nickels are made of 75 percent copper and only 25 percent nickel.