Qualla: White Cliffs of Dover

White Cliffs of Dover: Introduction

Tue, 19 May 2026 00:00:00 GMT

Photo credit Immanuel Giel, CC BY-SA 3.0. Every wall of the White Cliffs is the corpses of plankton. The microscopic single-celled algae called coccoliths floated in a warm Cretaceous sea between 100 and 66 million years ago, made their tiny calcium-carbonate skeletons, and when they died, drifted to the seabed. Half a millimetre a year of new sediment settled on top - about 180 coccoliths stacked one above another for every year of accumulation. Up to 500 metres of those sediments piled up. The weight compacted them into chalk. Then the Alpine orogeny - the same continental collision that built the Alps and the Pyrenees - lifted the seabed clear of the water. Then the great glacial floods, between 450,000 and 180,000 years ago, breached the chalk ridge that connected Britain to France. Then the sea finished separating Britain from Europe about 10,000 years ago. What you see from the deck of the ferry, or from the cliff path - the 350-foot wall of white chalk veined with black flint, stretching eight miles either side of Dover Harbour - is the fossilised skeleton of an extinct ocean.

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Image: Immanuel Giel | CC BY-SA 3.0

White Cliffs of Dover: Albion

Tue, 19 May 2026 00:00:00 GMT

Photo credit Dguendel, CC BY 4.0. On a clear day from the cliffs you can see France, twenty miles away across the Strait of Dover - the narrowest pinch of the English Channel. The chalk cliffs of the Alabaster Coast in Normandy belong to the same geological system; the strait was once a single connected ridge of ...

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Image: Dguendel | CC BY 4.0

White Cliffs of Dover: What Lives on the Edge

Tue, 19 May 2026 00:00:00 GMT

Photo credit Wsupermain2, CC BY-SA 3.0. The top of the cliffs is chalk grassland - a designated Site of Special Scientific Interest and Special Area of Conservation, managed by the National Trust, Natural England, and the County Wildlife Trusts. A grazing programme using Exmoor ponies controls the faster-growing invasi...

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Image: Wsupermain2 | CC BY-SA 3.0

White Cliffs of Dover: About Those Bluebirds

Tue, 19 May 2026 00:00:00 GMT

Photo credit Rurik, Public domain. Vera Lynn recorded 'There'll Be Bluebirds Over The White Cliffs of Dover' in 1942, in the depths of the Second World War, when the cliffs had become a symbol of British resolve - the welcoming sight that thousands of evacuated allied troops on the little ships saw when they retur...

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Image: Rurik | Public domain

White Cliffs of Dover: Erosion

Tue, 19 May 2026 00:00:00 GMT

Photo credit Michael Rowe at English Wikipedia, Public domain. The cliffs are slowly dying. Thousands of years ago, they eroded at about 3 cm a year. Research suggests the rate over the last 150 years has accelerated to 22-32 cm a year, driven by loss of the protective beach below the cliffs, intensified storms, and human activity such as gr...

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Image: Michael Rowe at English Wikipedia | Public domain