Mass genera extinctions – Phanerozoic biodiversity

Mass genera extinctions - Phanerozoic biodiversity

Mass genera extinctions – Phanerozoic biodiversity

Mass genera extinctions – Phanerozoic biodiversity – So far, on the Earth was 5 great periods of extinction. The oldest occurred in the Ordovician period 440 million years ago. The next it: in the Devonian period – 365 million years ago, in the Permian 245 million years ago. Silurian 210 million years ago and the biggest in the Cretaceous 65 million years ago. During the last dinosaurs became extinct all.