Geologic Column

By Solecito00
  • Cambrian Period
    54,200 BCE

    Cambrian Period

    Sudden explosión of life; trilobites dominant; rise of other marine invertebrates; some vertebrates.
  • Ordivician Period
    48,830 BCE

    Ordivician Period

    Trilobites abundante; vertebrates increase.
  • Silurian Period
    44,370 BCE

    Silurian Period

    Land colonized by arthropods and plants.
  • Devonian Period
    41,600 BCE

    Devonian Period

    First amphibians; freshwater fish; wingless insects.
  • Mississippian Period
    35,920 BCE

    Mississippian Period

    Amphibians spread; sharks and Bony fish; winged insects.
  • Pennsylvanian Period
    31,810 BCE

    Pennsylvanian Period

    Giant insects; first reptiles.
  • Permian Period
    29,900 BCE

    Permian Period

    Modern insects; reptiles spread; evergreens; extinctions of trilobites.
  • Triassic Period
    25,100 BCE

    Triassic Period

    First dinosaurs; rise of mammal-like reptiles.
  • Jurassic Period
    19,960 BCE

    Jurassic Period

    Giant dinosaurs; early birds; first mammals.
  • Cretaceous Period
    14,550 BCE

    Cretaceous Period

    Mass extinctions(including dinosaurs);flowering plants appear.
  • Paleocene Epoch
    6550 BCE

    Paleocene Epoch

    Early mammals become dominant; rise of modern birds.
  • Eocene Epoch
    5580 BCE

    Eocene Epoch

    First horses.
  • Oligocene Epoch
    3390 BCE

    Oligocene Epoch

    Primitive apes; whales; first modern mammals.
  • Miocene Epoch
    2300 BCE

    Miocene Epoch

    Rise of grading mammals.
  • Pliocene Epoch
    530 BCE

    Pliocene Epoch

    Peak of mammals; modern invertebrates.
  • Pleistocene Epoch
    180 BCE

    Pleistocene Epoch

    Ice Age(s); mass extinctions; rise of man.
  • Recent(Holocene) Epoch

    Recent(Holocene) Epoch

    End of last Ice Age; rise of human civilization.