Geologic Time Scale- Congrove

By congrovem14

  • Precambrian Time 4600 MYA

    Precambrian Time 4600 MYA
    The Earth formed from planetary nebula.
    Oldest age-dated rocks on Earth.
    Fossil algae and stromatolites (prokaryotes).
    Fossil evidence of bacteria.
    Dossil evidence of cells with a nucleus (eukaryotes).
    First multi-celled organisms (seaweed and algae).
    Oldest marine worms and jelly fish.
  • Period: to

    Geologic Time Scale in One Year Calender

  • Orgin of life (first cells) 3900 MYA

    Orgin of life (first cells) 3900 MYA
    3900 Million years ago

  • Prokaryotes 3600 MYA

    Prokaryotes 3600 MYA

  • Eukaryotes 2100 MYA

    Eukaryotes 2100 MYA

  • Paloezoic Era 544 MYA

    Paloezoic Era 544 MYA

  • Cambrian Period 544 MYA

    Cambrian Period 544 MYA
    Burgess Shale animals. Animals with a notochord.

  • Ordovician Period 544 MYA

    Ordovician Period 544 MYA
    First fish. First fossil evidence. of land plants.

  • Silurian Period 438 MYA

    Silurian Period 438 MYA
    First vascular land plants. Oldest lung fish fossils.

  • Devonian Period 408 MYA

    Devonian Period 408 MYA
    Oldest fossil evidence of mosses. First insects. First lobe-finned fish. First land animals. First sharks. First seed plants.

  • Mississippian Period 360 MYA

    Mississippian Period 360 MYA
    First Possible Reptiles.

  • Pennsylvanian Period

    Pennsylvanian Period
    Permian system begins. Snail-backed reptiles (Dimetrodon). End of Paleozoic. 96% of all life on Earth perishes.

  • Mesozoic Era "The Age of the Reptiles" 245 MYA

    Mesozoic Era "The Age of the Reptiles" 245 MYA

  • Triassic Period 245 MYA

    Triassic Period 245 MYA
    First crocodiles. First dinosaurs. First mammals (shrew like). First turtles.

  • Jurasic Period 208 MYA

    Jurasic Period 208 MYA
    Dilophosaurus, early dinosaur. First bird - Archeopteryx. Apatosaurus and Brachiosaurus. Stegasaurus.

  • Cretaceous Period 144 MYA

    Cretaceous Period 144 MYA
    First flowering plants. Duck-billed dinosaurs. Protoceratops. Triceratops. Tyrannosaurus rex. Velociraptor. End of Mesozoic, probably meteor or comet impact.

  • Cenozoic Era - The Age of Mammals - 65 MYA

    Cenozoic Era - The Age of Mammals - 65 MYA

  • Tertiary Period 65 MYA

    Tertiary Period 65 MYA
    First ancestors of dogs and cats - 64 MYA. Grasses become widespread - 60 MYA. First ancestors of pigs and deer - 57 MYS. First horses - 55 MYS. First ancesotrs of rabbits - 45 MYA. First monkeys - 39 MYS. Oldest human like ancestors (hominids) - 4 MYA.

  • Quaternary Period 2 MYA

    Quaternary Period 2 MYA
    First of 4 ice ages - 1 MYA. Oldest direct human-ancestor fossil, Homo habilis - 1 MYS. First modern man, Homo sapiens - 0.1 MYA. Mammoth and mastodon bones - 0.05 MYA. Revolutuonary War- 235 years ago. World War II - 70 years ago.