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North Sea
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North Sea was subtropical and anoxic 56 million years ago

Past increases in atmospheric CO2 concentrations have led to acidification of the ocean and global warming. Petra Schoon of the Royal Netherlands Institute for Sea Research (NIOZ) found that these climate events had a large impact on the climate of Northern Europe, such as warming of 5-8C and removal of most of the oxygen from the water of the North Sea. Schoon will defend her thesis on April 3rd at Utrecht University.
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RE: Orcadian sea
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 World's Largest Sand Mass Discovered Under Seafloor

Scientists used 3-D seismic data and samples drilled from the ocean bottom during fossil fuel exploration to analyse a huge body of sand that lies over an oil field in the North Sea. Their research suggested it was "extrusive," spewed out from fissures in the seafloor likely over the course of years sometime between 400,000 and 2.6 million years ago.
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A north-east marine aquarium is offering visitors the chance to view examples of sea creatures millions of years old.
A display of fish fossils drawn from various collections has gone on show at Macduffs aquarium.
The collection includes species which would have flourished locally when the Moray Firth was a seawater lake.

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