Earth geologic clock
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Earth geologic clock
09/10/2014
PD
WPClipart
4550 Ma:
Hominids
Mammals
Land plants
Animals
Multicellular life
Eukaryotes
Prokaryotes
Hadean
Archean
Proterozoic
Paleozoic
Mesozoic
Cenozoic
4527 Ma:Formation of the Moon
4.6 Ga
4 Ga
3.8 Ga
3 Ga
2.5 Ga
2 Ga
1 Ga
542 Ma
251 Ma
65 Ma
ca. 4000 Ma: End of theLate Heavy Bombardment;first life
ca. 3500 Ma:Photosynthesis starts
ca. 2300 Ma:Atmosphere becomes oxygen-rich;first Snowball Earth
750-635 Ma:Two Snowball Earths
ca. 530 Ma:Cambrian explosion
ca. 380 Ma:First vertebrate land animals
230-65 Ma:Dinosaurs
2 Ma:First Hominids