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Ordovician-Silurian extinction events
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Extinction events
Ordovician period
Silurian period
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Late Ordovician mass extinction (LOME)
Ordovician-Silurian extinction events
Ordovician–Silurian extinction events - Wikipedia
https://en.wikipedia.org/wiki/Ordovician%E2%80%93Silurian_extinction_events
Late Ordovician mass extinction (LOME)
Ordovician-Silurian extinction events