Geologicaltimescale4

Geologic timeline

By zonkejon
  • 4500 BCE

    4.5 billion years ago

    4.5 billion years ago
    Earth was just now starting to geologically form.
  • 2500 BCE

    Archean Eon

    Archean Eon
    Earth's crust had cooled enough to allow the continents and life started to form.
  • 570 BCE

    Proterozoic Eon

    Proterozoic Eon
    Eon spanning from the time oxygen first appeared on Earth to just before complex life started forming.
  • 541 BCE

    Cambrian

    Cambrian
    First geological period of the Paleozoic Era
  • 358 BCE

    Mississippian

    Mississippian
    First major subdivision of the Carboniferous Period.
  • 251 BCE

    Triassic

    Triassic
    First and shortest period of Mesozoic Era
  • 201 BCE

    Jurassic

    Jurassic
    Was the middle period in the Mesozoic Era, also known as the age of reptiles.
  • 145 BCE

    Cretaceous

    Cretaceous
    Third and final period in the Mesozoic Period, ended with mass extinction
  • 66 BCE

    Tertiary

    Tertiary
    Was a period of time consisting from 66-2.6 mya.
  • 2 BCE

    Quanternary

    Quanternary
    Is the most current and most recent of the three periods.