what do you understand by geological time scale? How many eras are there in n geological time scale ? Discribe major geological events tht happened in the mesozoic and Cenozoic Era?
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Eras. Eons of geological time are subdivided into eras, which are the second-longest units of geological time. The Phanerozoic eon is divided into three eras: the Paleozoic, Mesozoic, and Cenozoic. ... Finally, the Cenozoic ("new life") era is sometimes called the "age of mammals" and is the era during which we live today.
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