History of Earth
Eons

History of Earth

Section Title: Eons
Table Section Text: None

Eon	Time (mya)	Description

Hadean	4,540–4,000	The Earth is formed out of debris around the solar protoplanetary disk. There is no life.

Archean	4,000–2,500	Prokaryote life, the first form of life, emerges at the very beginning of this eon, in a process known as abiogenesis.

Proterozoic	2,500–541	The name of this eon means "early life". Eukaryotes, a more complex form of life, emerge, including some forms of multicellular organisms.

Phanerozoic	541–present	Complex life, including vertebrates, begin to dominate the Earth's ocean in a process known as the Cambrian explosion. Pangaea forms and later dissolves into Laurasia and Gondwana, which in turn dissolve into the current continents.

Sentence(s)

The history of Earth is divided into four great eons, starting from 4,540 mya with the formation of the planet.

final_sentence: The history of Earth is divided into four great eons, starting from 4,540 mya with the formation of the planet.