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Coordinates: 51°08′N 1°22′E / 51.14°N 1.37°E / 51.14; 1.37

The White Cliffs of Dover
The cliffs seen across the channel from Cap Gris Nez, France
The location and extent of the White Cliffs of Dover.

The White Cliffs of Dover are cliffs which form part of the British coastline facing the Strait of Dover and France. The cliffs are part of the North Downs formation. The cliff face, which reaches up to 107 metres (350 ft) [1], owes its striking façade to its composition of chalk (pure white calcium carbonate) accentuated by streaks of black flint. The cliffs spread east and west from the town of Dover in the county of Kent, an ancient and still important English port.

The cliffs have great symbolic value for Britain because they face towards Continental Europe across the narrowest part of the English Channel, where invasions have historically threatened and against which the cliffs form a symbolic guard. Because crossing at Dover was the primary route to the continent before air travel, the white line of cliffs also formed the first or last sight of the UK for travellers.

Contents

Location

The cliffs are located along the coastline between approximately: Latitude 51°06'N, Longitude 1°14'E and Latitude 51°12'N, Longitude 1°24'E. Shakespeare Cliff marks the point where England most closely approaches continental Europe. On a clear day, the cliffs are easily visible from the French coast.

Geology

The cliffs are composed mainly of soft, white limestone with a very fine-grained texture, composed primarily of coccoliths, plates of calcium carbonate formed by coccolithophores, single-celled planktonic algae whose skeletal remains sank to the bottom of the ocean and, together with the remains of bottom-living creatures, formed sediments. Flint and quartz are also found in the chalk.[2]

White cliffs like those of Dover (but smaller) are also found on the Danish islands of Møn and Langeland or the coasts of the island of Rügen in Germany. The cliff face continues to erode at an average rate of 1 centimetre (0.39 in) per year, although occasionally—most recently in 2001—a large chunk of the edge, as large as a football pitch, fell into the channel. Visitors are, therefore, urged to remain well away from the cliff edge.[3].

Ecology

Evidence of erosion along the cliff top
Close up of the cliffs from the walk along the ridge
South Foreland lighthouse above the cliffs at Dover

Several species of cliff nesting birds nest on the cliff face, including fulmar and colonies of Black-legged Kittiwake. However, contrary to the words of the famous song ("There'll be bluebirds over the white cliffs of Dover"), bluebirds are an American species not found in the UK.

Defence

Behind the cliff face are miles of hidden tunnels that were created during the Middle Ages and later played a role in the defence of Britain during the Napoleonic Wars. The tunnels were later enlarged to become the Secret Wartime Tunnels beneath Dover Castle.

In popular culture

See also

Notes

External links








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