Proterozoic Period
Read and learn about the Proterozoic Period...
https://en.wikipedia.org/wiki/Proterozoic Mesozoic Period
Read and learn about the Mesozoic Period...
https://en.wikipedia.org/wiki/Mesozoic Palaeozoic Period
Read and learn about the Palaeozoic Period...
https://en.wikipedia.org/wiki/Paleozoic Cenozoic Period
Read and learn about the Cenozoic Period...
https://en.wikipedia.org/wiki/Cenozoic Geologic time scale
The geological time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time, and is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth’s history.
https://en.wikipedia.org/wiki/Geologic_time_scale