Doggerland was an area now beneath the southern North Sea that connected Great Britain to continental Europe during and after the last glacial period, 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, The three Storegga Slides are considered to be amongst the largest known ?
Storegga Slide: The three Storegga Slides are considered to be amongst the largest known landslides.
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