Isaac's Timescale of time

By IEngels
  • 570 BCE

    Cambrian

    Cambrian
  • 488 BCE

    Ordovician

    Ordovician
    a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.2 million years from the end of the Cambrian Period 485.4 (mya)
  • 443 BCE

    Silurian

    Silurian
  • 419 BCE

    Devonian

    Devonian
    The first significant adaptive radiation of life on dry land occurred during the Devonian
  • 359 BCE

    Carboniferous

  • 299 BCE

    Permian