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A Megaflood Made England an Island

Sonar shows Channel carved violently; bridge to continent cut

By Colleen Barry,  Newser Staff

Posted Jul 19, 2007 8:23 AM CDT

(Newser) – England became an island as a result of a massive flood that tore through a land bridges to France 400,000 years ago, a study of  high-resolution sonar images of the bottom of the English Channel shows. The torrent of water and boulders carved the cliffs of Dover, and left deep scars on the channel bed, researchers report in the journal Nature.

The megaflood, they hypothesize, was caused by a vast freshwater lake, covering what is now the southern North Sea, breaking through a natural chalk dam at what is now the Dover strait. "This prehistoric event rewrites the history of how the UK became an island," said one researcher.

Dover Beach and English Channel
Dover Beach and English Channel   ((c) Anosmia)
North Sea
North Sea   ((c) Glen Bowman)
North Sea
North Sea   ((c) Glen Bowman)
The White Cliffs of Dover
The White Cliffs of Dover   ((c) Jon's pics)
The White Cliffs of Dover
The White Cliffs of Dover   ((c) Jon's pics)
The White Cliffs of Dover
The White Cliffs of Dover   ((c) Jon's pics)
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COMMENTS
Showing 1 of 1 comment
Islander
Jul 21, 2009 9:36 AM CDT
England has never been an island. Great Britain is an island. The United Kingdom (UK) is not an island. It stretches across two islands. The British Isles are several islands. When the next two mega-floods strike, separating Wales from England and Scotland from England, England might be an island. Aways good to get your facts right!

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