Silurian tides

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Silurian tides

A tidal simulation for the Late Silurian, with the colors depicting varying tidal ranges in meters for two tidal constituents. The first being the semi-diurnal (twice a day) lunar constituent (A-C), and the semi-diurnal (twice a day) solar constituent (D-F). Enlarged areas of evolutionary interest are shown in (B) and (E) for the South China region and (C) and (F) for Laurussia. Note the large tidal ranges seen around the South China region, the area where the first bony fish appeared.
Mattias Green/Bangor University
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Mattias Green/Bangor University
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  • Simulated tides during the Late Silurian. Credit: Mattias Green/Bangor University

    Large tides may have driven evolution of fish towards life on land

    Big tidal ranges some 400 million years ago may have initiated the evolution of bony fish and land vertebrates. This theory is now supported by researchers in the UK and at Uppsala University who, for the first time, have used established mathematical models to simulate tides on Earth during this period. The study has been published in Proceedings of the Royal Society A.

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