Geologic Time on Earth

  • Period: 4550 BCE to 570 BCE

    Precambrian

    Hadean (4550-3800), Archean (3800-2500), and Proterozoic (2500-570)
  • Period: 570 BCE to 245 BCE

    Paleozoic

    Cambrian (570-505), Ordovician (505-436), Silurian (436-406), Devonian (406-360), Mississipian (360-320), Pennsylvanian (320-286), and Permian (286-245)
  • Period: 245 BCE to 66 BCE

    Mesozoic

    Triassic (245-206), Jurassic (206-144), and Cretaceous (144-66)
  • Period: 66 BCE to 23 BCE

    Cenozoic

    Paleogene: (Paleocene (66.4-57.8), Eocene(57.8-36.6), and Oligocene (36.6-23.7)
  • Period: 23 BCE to 1 BCE

    Cenozoic

    Neogene: Miocene (23.7-5.3) and Pilocene (5.3-1.6)
  • Period: 1 BCE to

    Cenozoic

    Quaternary: Pleistocene (1.6-0.01) and Holocene (0.01-present)