(Hadeon, Archeon, Proterozoic)
Planet began to form during this period of time.
Earth's crust cools and begins formation of continents in this eon.
Life begins to take on the form of complex organisms.
A period in which evolution was at it's highest, introduced many of the earth's diverse life forms seen today.
Represents the period in time in which diverse marine invertebrates and other organisms begin to populate the oceans.
Introduction of marine animals moving onto land.
Introduction of new types of fishes which contain bones, teeth, and jaws.
Start of Carboniferous Period.
End of Carboniferous Period.
Large mass extinction of marine organisms.
Therapsids and archosaurs become dominant terrestial vertebrates. Dinosaurs, a subgroup of archosaurs are introduced.
Dinosaurs become the dominant terrestrial mammals.
The longest period of the Mesozoic Era, ends in the mass extinction of dinosaurs due to an asteroid.
The beginning of the new era, and also the current era. The age of diverse mammals.
Represents the extinction of certain mammals from the Tertiary period such as the woolly mammoth. This the the period of time that humans thrive in.