Question

What is an eon, an era, a period, and an epoch?

Answer 1

1. An eon means a period of time that is so long that it cannot be measured ( something close to a millennia)

2. An era means a long and distinct period of history. like a unique portion of history.

3.  A period is  a major division of geological time that is a subdivision of an era .

4 . An epoch is a division of time that is a subdivision of a period and is itself subdivided into ages.