GEOLOGICAL TIME

  • Period: 541 BCE to 252 BCE

    ERA PALEOZOICA

  • Period: 541 BCE to 485 BCE

    Cambrian

    many marine invertebrates with external skeletons (arthropods)
  • Period: 485 BCE to 444 BCE

    Ordovician

    widespread marine algae, fish without jaws
  • 460 BCE

    widespread marine algae, fish without jaws

  • 460 BCE

    many marine invertebrates with external skeletons (arthropods)

  • Period: 444 BCE to 419 BCE

    Silurian

    first land plants
  • 430 BCE

    first land plants

  • Period: 419 BCE to 359 BCE

    Devonian

    fish diversify, first amphibians
  • 370 BCE

    fish diversify, first amphibians

  • Period: 359 BCE to 299 BCE

    Carboniferous

    forestsof giant ferns, first reptiles
  • 320 BCE

    forestsof giant ferns, first reptiles

  • Period: 299 BCE to 252 BCE

    Permian

    reptiles diversify
  • 270 BCE

    reptiles diversify

  • Period: 252 BCE to 66 BCE

    ERA MESOZOICA

  • Period: 252 BCE to 201 BCE

    Triassic

    first dinosaurs, first mammals
  • 220 BCE

    first dinosaurs, first mammals

  • Period: 201 BCE to 145 BCE

    Jurassic

    gymnosperm plants dominate the Earth surface, dinosaurs diversify, first birds
  • 170 BCE

    gymnosperm plants dominate the Earth surface, dinosaurs diversify, first birds

  • Period: 145 BCE to 66 BCE

    Cretaceous

    first plants with flowers, extinction of dinosaurs and ammonites
  • 100 BCE

    first plants with flowers, extinction of dinosaurs and ammonites

  • Period: 66 BCE to 2 BCE

    Tertiary

    development and diversification of mammals,
  • 20 BCE

    development and diversification of mammals,

  • Period: 2 BCE to 10

    Quaternary

    development and diversification of mammals
  • 1 BCE

    development and diversification of mammals

  • Period: 66 to 2

    ERA CENOZOICA