Final answer:
The Cenozoic Era is divided into four epochs: the Paleogene, Neogene, Quaternary, and the unofficially recognized Anthropocene. These epochs mark various evolutionary, climate, and geological events.
Step-by-step explanation:
The Cenozoic Era is known as the age of mammals and is the most recent of the geological eras, representing the time following the mass extinction of the dinosaurs. It began about 65 million years ago and is ongoing. The Cenozoic Era is divided into four epochs: The Paleogene (which includes the Paleocene, Eocene, and Oligocene epochs), the Neogene (which includes the Miocene and Pliocene epochs), the Quaternary (which includes the Pleistocene and Holocene epochs), and the current epoch, which is the Anthropocene, although the Anthropocene is not yet officially recognized as a formal epoch in geology.
These epochs are significant as they mark different stages in the evolution and spread of mammals and other forms of life, the shifts in climate, as well as changes in Earth's geology.