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Last Updated: Thursday, 6 March 2008, 18:17 GMT
Sea level 'to fall over long-term'

Rising se level map

The effect of a 170m sea level rise superimposed on today's continents. Modelling work led from the University of Sydney, Australia, shows how sea levels were considerably higher 80 million years ago in the Cretaceous Period.

Falling sea level map

The effect of a 120m sea level fall superimposed on today's continents. The Australian-led study expects geological processes over the next 80 million years to continue deepening ocean basins, dropping sea levels. (Images courtesy of R. Dietmar Muller)

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