GENERAL GEOLOGY

Detailed explanation-1: -Eons are the largest divisions of geologic time scale spanning millions to billions of years. Eras are divisions within eons that span hundreds of millions of years. Periods are the subdivisions within eras that span tens of millions of years. More items •19-Mar-2022

Detailed explanation-2: -Eons are the largest divisions of geological time and are split into two main divisions; Precambrian eon and the Phanerozoic eon. The three major eras are Paleozoic, the Mesozoic, and the Cenozoic. Each era is then divided into multiple periods and those periods are divided into smaller epochs.

Detailed explanation-3: -Eon: Two or more eras compose an Eon. This is the largest division of time, lasting hundreds of millions of years.

Detailed explanation-4: -Eons, or Eonothems, are the largest division of time, lasting thousands of millions of years. There eons are: the Phanerozoic (current eon) and the Precambrian eons of the Proterozoic, Archean, and Hadean. Eras, or Erathems, are the subdivisions of eons. They are more on the scale of hundreds of millions of years.

Detailed explanation-5: -Eons are the largest intervals of geologic time and are hundreds of millions of years in duration. In the time scale above you can see the Phanerozoic Eon is the most recent eon and began more than 500 million years ago. Eons are divided into smaller time intervals known as eras.