GEOLOGY

Detailed explanation-1: -The Phanerozoic Eon is divided into three eras, the Paleozoic, Mesozoic and Cenozoic eras. These were named for the kinds of fossils that were present. The Cenozoic is the youngest era and the name means “new life”. This is because the fossils are similar to animals and plants that are common today.

Detailed explanation-2: -The eras are the four major divisions of the geological time scale: Precambrian, Paleozoic, Mesozoic, and Cenozoic.

Detailed explanation-3: -the Palaeozoic, an era of arthropods, amphibians, fishes, and the first life on land; the Mesozoic, which spanned the rise, reign of reptiles, climactic extinction of the non-avian dinosaurs, the evolution of mammals and birds; and. the Cenozoic, which saw the rise of mammals.

Detailed explanation-4: -Two or more periods compose on Era. One Era is hundreds of millions of years in duration.