<P> Coordinates: 51 ° 08 ′ N 1 ° 22 ′ E ﻿ / ﻿ 51.14 ° N 1.37 ° E ﻿ / 51.14; 1.37 </P> <P> The White Cliffs of Dover are cliffs that form part of the English coastline facing the Strait of Dover and France . The cliffs are part of the North Downs formation . The cliff face, which reaches up to 350 feet (110 m), owes its striking appearance to its composition of chalk accented by streaks of black flint . The cliffs stretch along the coastline for eight miles (13 km), spreading east and west from the town of Dover in the county of Kent, an ancient and still important English port . </P>

When was the white cliffs of dover formed