Unformatted text preview: They said that the catastrophe would have to be large, but not large enough to wipe out all living things. The Mesozoic Era was said to be approximately one-hundred and thirty million years ago. During this time period the first flowers and primates started to emerge onto the land. Works Cited Cowen, Richard. "The End of the Dinosaurs: The K-T Extinction." "Geologic Time Chart with Mass Extinctions."...
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- Spring '09
- Geology, Extinction event, Cretaceous–Tertiary extinction event