Phanerozoic Eon
The Phanerozoic Eon is the current eon in the geologic timescale. It covers roughly 545 million years. During this period continents drifted about, eventually collected into a single landmass known as Pangea and then split up into the current continental landmasses.
The Phanerozoic is divided into three eras — the Paleozoic, the Mesozoic and the Cenozoic.
Read more about this topic: Geological History Of Earth