Earth History, from the end ...
Eon	Era	Period	Geological Events	Biological Events
		Quaternary	Great Lakes Series of Ice Ages	Cro-Magnons Mammoths Australopithecus
	Cenozoic	Tertiary	Colarado Plateau	Radiation of Mammals
	65 million years ago		Asteroid Impact!!	K-T Extinction
	100 million	Cretaceous		Tyrannosaurus - Sue Triceratops Dinosaur Nesting Velociraptor Flowering Plants
Phanerozoic	Mesozoic 200 million	Jurassic	Morrison formation Break-Up of Pangaea	Early Birds Megalosaurus Pterosaurs
		Triassic
	245 million years ago			P-T Extinction
		Permian	Pangaea
	300 million	Carboniferous	Cyclothems	Pelycosaurs
	Paleozoic 400 million	Devonian	Appalachian Mtns	First Amphibians Paleozoic Fish
		Silurian
Phanerozoic		Ordovician
	500 million	Cambrian		Trilobites Burgess Shale Fauna Cambrian Explosion Tommotian Fauna
	544 million years ago			Evolution of Hard-Parts
	600 million			Ediacara fauna
	700 million		Snowball Earth episodes
Proterozoic	Neo- proterozoic 800 million
	900 million
	1,000 million		Rodinia
Proterozoic	1,100 million		Grenville Orogeny
	1,200 million
	1,300 million
Proterozoic	Meso- proterozoic 1,400 million
	1,500 million
	1,600 million
Proterozoic	1,700 million			First Eukaryotes
	1,800 million
	1,900 million
Proterozoic	2,000 million		Atmospheric O2
	Paleo- proterozoic 2,100 million
	2,200 million		Early Proterozoic Glaciation
Proterozoic	2,300 million
	2,400 million
				Stromatolites Common
	2,500 million years ago		Sizable Continents
Archean	2,600 million
	2,700 million
	2,800 million
Archean	2,900 million
	3,000 million
	3,100 million
Archean	3,200 million
	3,300 million
	3,400 million
Archean	3,500 million			Earliest Fossils
	3,600 million
	3,700 million
Archean	3,800 million
	3,900 million		Oldest Rocks
	4,000 million
Archean	4,100 million
	4,200 million
	4,300 million
Archean	4,400 million
	4,500 million
	4,560 million years ago		Formation of the Earth
... to the beginning!

Archean

Paleoproterozoic

Mesoproterozoic

Neoproterozoic

Phanerozoic