Documents Cenozoic Era Geologic Time. Eons: Hadean ▫4.5-3.8 bya Archaean ▫3.8-2.5 bya Proterozoic ▫2.5.....

Cenozoic Era Geologic Time Eons: Hadean 4.5-3.8 bya Archaean 3.8-2.5 bya Proterozoic 2.5 bya â 543 mya Phanerozoic 543 mya-present At only 66 million years long, the Cenozoic…