Geologic Timeline

By Margaret A
  • 200

    Oldest Known Fossil

    Oldest Known Fossil
    The cyanobacteria has an extensive fossil record. They're the oldest known fossil from Archaean rocks of wetern Australia, which are dated 3.5 billion years old.
  • Period: 200 to 300

    Precambrian Era

  • 300

    First Fish-510 MYA

    First Fish-510 MYA
    The first fish, at some stage in there life history, had gill slits in a region of their head. They had developed gills and a simple sort of spinal nerve.
  • Period: 300 to

    Paleozoic Era

  • 400

    First Forest- 408 MYA

    First Forest- 408 MYA
    In the Cretaceous Period (144-65m mya), the first flowering plants (angiosperms) appeared. They evolved together with insects, birds, and mammals and radiated rapidly. In which dominating the landscape by the end of the Period.
  • 500

    First Land Animals- 408 MYA

    First Land Animals- 408 MYA
  • May 5, 600

    Coal-forming forests- 362 MYA

    Coal-forming forests- 362 MYA
  • Jun 6, 700

    First Reptiles- 322 MYA

    First Reptiles- 322 MYA
  • Aug 9, 1000

    Dinosaurs Appear- 230 MYA

    Dinosaurs Appear- 230 MYA
    Approximately 230 MYA, during the Triassic Period, the dinosaurs appeared, from elvolving from reptiles. Plateosaurus was one of the first large plant-eating dinosaurs, It grew to about 9 meters in length.
  • Sep 10, 1100

    Pangaea begins to break apart- 208 MYA

    Pangaea begins to break apart- 208 MYA
    Pangaea started to break up into the continents that we know now during the middle of the Jurassic time period, about 175 million years ago. The cuase of this was the movement of plate tectonics. to this day the continents are still moving.
  • Oct 11, 1200

    First mammals- 200 MYA

    First mammals- 200 MYA
    A tiny furry-tailed creature were the ancestor of mice, elephants, lions, tigers, bears, whales, bats and humans once looked like. Reaserches say that these new findings also suggest this forerunner of most mammals appeared shortly after the catastrophe that ended the age of dinosaurs.
  • Nov 12, 1300

    Dinosaurs Extinct- 65 MYA

    Dinosaurs Extinct- 65 MYA
    Sixty-five million years ago the dinosaurs died out along with more than 50% of other life forms on the planet. This mass extinction is so dramatic that for many years it was used to mark the boundary between the Cretaceous Period, when the last dinosaurs lived, and the Tertiary Period, when no dinosaurs remained.
  • Period: Nov 13, 1300 to

    Cenozoic Era

  • Dec 13, 1400

    Homo Sapiens Appear – 100,000 YA

    Homo Sapiens Appear – 100,000 YA
    First homo sapiens evolved in west Africa now owrldwide. Modern humans have larger brains than first humans.
  • Jan 14, 1500

    Most recent Ice Age- 10,000 YA

    Most recent Ice Age- 10,000 YA
    The Pleistocene Epoch is the first in which Homo sapiens evolved, and by the end of the epoch humans could be found in almost every part of the planet. The most recent Ice Age occurred then, as glaciers covered huge parts of the planet Earth.

  • My Birthday

    My Birthday

  • Marine Reptiles- 2,500 MYA

    Marine Reptiles- 2,500 MYA
    The first were marine reptiles, including lizards and snakes. The second were the archosaurs, which would give rise to crocodiles, dinosaurs and birds.

  • Pangaea Forms- 250 MYA

    Pangaea Forms- 250 MYA
    Scientists believe that about 250 MYA alll the continents we have now were all connected at a point. Pangaea was still together during the time of the dinosaurs.
  • Period: to Nov 12, 1300

    Mesozoic Era