Ordovician–Silurian extinction events ~ Detailed Information | Photos | Videos
Ordovician–Silurian extinction events ~ Detailed Information | Photos | Videos
The OrdovicianSilurian extinction events, when combined, are the secondlargest of the five major extinction events in Earth's history in terms of percentage of genera that became extinct. This event greatly affected marine communities, which caused the disappearance of one third of all brachiopod
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