The development of the geological chart

Geologists around the world contributed to the development of the geological chart, which defines the subdivision of the history of our planet and the life it supports. Some people claim that the evolutionary explanation for the history of life on Earth and this geological chart form a kind of circular reasoning. The claim is that each of them is used as evidence to support the other. Explain exactly why this claim is false. 

"Get 15% discount on your first 3 orders with us"
Use the following coupon
"FIRST15"

Order Now