Geologic Time Scale- Beasley

By beasleyl14

  • Precambrian Time 4600 MYA

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

    1 year

  • Origin of life (first cells) 3900 MYA

    Origin of life (first cells) 3900 MYA
    3900 millon 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 aminals. 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 planets. Oldest lung fish fossils.

  • Devonian Period 408 MYA

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

  • Mississippian Period 360 MYA

    Mississippian Period 360 MYA
    First possible reptiles.

  • Pennslyvanian Period

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

  • Mesozoic Era "The Age Of Reptiles" 245 MYA

    Mesozoic Era "The Age Of Reptiles" 245 MYA

  • Triassic Period 245 MYA

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

  • Jurassic Period 208 MYA

    Jurassic Period 208 MYA
    Dilophosaurus, early dinosaur. First bird- Archeopteryx. Apatosaurus and Brachiosaurus, Stegosaurus.

  • Cretaceous Period 144 MYA

    Cretaceous Period 144 MYA
    First flowering plants. Duck-billed dimosaurs. Protoceratops. Triceratops. Tyrannosaurus rex. Velociraptor. End of Meszoic, probaly 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 MYA. First horses- 55 MYA. First ancestors or rabbits 45 MYA. First monkeys - 39 MYA. Oldest human like ancestors (hominids) - 4 MYA.

  • Quaternary Period

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