<P> Doggerland is the name of a land mass now beneath the southern North Sea that connected Great Britain to continental Europe . It was flooded by rising sea levels around 6,500 -- 6,200 BC . Geological surveys have suggested that it stretched from Britain 's east coast to the Netherlands and the western coasts of Germany and the peninsula of Jutland . It was probably a rich habitat with human habitation in the Mesolithic period , although rising sea levels gradually reduced it to low - lying islands before its final submergence , possibly following a tsunami caused by the Storegga Slide . </P>
<P> Doggerland is the name of a land mass now beneath the southern North Sea that connected Great Britain to continental Europe . It was flooded by rising sea levels around 6,500 -- 6,200 BC . Geological surveys have suggested that it stretched from Britain 's east coast to the Netherlands and the western coasts of Germany and the peninsula of Jutland . It was probably a rich habitat with human habitation in the Mesolithic period , although rising sea levels gradually reduced it to low - lying islands before its final submergence , possibly following a tsunami caused by the Storegga Slide . </P>
when did britain become permanently separated from the continent by the channel
when did britain become permanently separated from the continent by the channel
around 6,500 -- 6,200 BC
around 6,500 -- 6,200 BC