Over the SeaThe Silurian period was the shortest if the periods in the Paleozoic Era, and after extinction life had to build itself up again.
Many animals were finally able to swim and feed closer to the shore. Coral reefs form and expanded, and in oceans crinoids and brachiopods flourished. There is fossil evidence that there may have been possible life on land at the time. The Lau, Mulde and Ireviken EventsThe Lau event happened in the middle of the Silurian and was a relatively minor mass extinction having a major effect on certain types of conodont fauna.
The Mulde event was a minor mass extinction that was followed by a global drop in sea level and the excursion of geothermal Isotopes. The Ireviken event which wiped out 80% of conodonts also wiped out 50% of trilobites- mainly in Gotland. GeologyThe Silurian saw Gondwana drift completely over the south pole. In addition, Baltica, Avolonia and Laurentia collided at the end of the silurian, creating many mountain ranges we have today like the Appalachians, Caledonides, and the Urals.
This craton collision formed the minor supercontinent of Euramerica. ClimateThe early silurian was dominated by ice sheets and glaciers, but had warmed to temperatures equal to the devonian or the ordovician about halfway through
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