Permian Period Reptiles - 搜索视频

PPT - Permian Period PowerPoint Presentation, free download - ID:2851177

PPT - Permian Period PowerPoint Presentation, free download - ID:2851177

Permian Period. 299 -251 million years ago. 2 51 mya – Mass extinction The Paleozoic ends with the greatest Mass Extinction in geologic history. Permian Plants. Conifers 1 st Appear (Needle like trees) Cycads Appear (Seed Fern). Terrestrial Animals. 1 st Archosaur s Appear

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