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    France Administrator Hervé's Avatar
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    Default Brexglomerate?

    Geologists reveal Great Britain was created by collision of 3 landmasses

    University of Plymouth Phys.org
    Fri, 14 Sep 2018 12:00 UTC

    For centuries scientists thought England, Wales and Scotland were created by the merger of two land masses, Avalonia and Laurentia, more than 400 million years ago, but a third land mass called Armorica was involved in the process, geologists now say

    The British mainland was formed from the collision of not two, but three ancient continental land masses, according to new research.

    Scientists have for centuries believed that England, Wales and Scotland were created by the merger of Avalonia and Laurentia more than 400 million years ago.

    However, geologists based at the University of Plymouth now believe that a third land mass-Armorica-was also involved in the process.

    The findings are published in Nature Communications and follow an extensive study of mineral properties at exposed rock features across Devon and Cornwall.

    They reveal a clear boundary running across the two counties, with areas north of it sharing their geological roots with the rest of England and Wales but everything south being geologically linked to France and mainland Europe.

    Among other things, scientists believe the research explains the abundance of tin and tungsten in the far South West of England-metals also found in Brittany and other areas of mainland Europe, but not so evident in the rest of the UK.

    The research's lead author, Lecturer in Igneous Petrology Dr. Arjan Dijkstra, said:
    "This is a completely new way of thinking about how Britain was formed. It has always been presumed that the border of Avalonia and Armorica was beneath what would seem to be the natural boundary of the English Channel. But our findings suggest that although there is no physical line on the surface, there is a clear geological boundary which separates Cornwall and south Devon from the rest of the UK."

    Explore further:
    Who do you think you really are? The first fine-scale genetic map of the British Isles
    More information: Arjan H. Dijkstra et al, Mapping a hidden terrane boundary in the mantle lithosphere with lamprophyres, Nature Communications (2018). DOI: 10.1038/s41467-018-06253-7

    Journal reference: Nature Communications

    Provided by: University of Plymouth
    =========================================

    Which makes for an interesting, completely off-topic, question:
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    UK Avalon Member Sunny-side-up's Avatar
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    Default Re: Brexglomerate?

    Yay I'm an Avolonian ancestry
    Better check the genetic map first i guess.

    Hmm I can see Scotland and main land Britain being a collision but Cornwall and Devon being separate land masses once?
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