Geologic Time Scale

By kennedy.gosling
  • Earth is Formed
    4600 BCE

    Earth is Formed

    Archean Eon
  • 2500 BCE

    Sask. is part of a large ancient continent

    Proterozioc Eon
  • 544 BCE

    Sask. covered by the epicontonental Sauk Sea

    Phanerozioc Eon, Paleozioc Era, Cambrian Period
  • 489 BCE

    Hard shelled invertebrates including Trilobites

    Ordovician Period
  • 433 BCE

    Tyndall Stone deposited as massive limestone

    Silurian Period
  • 418 BCE

    Winnipegosis Reefs are deposited, later to become a trap for oil deposits

    Devonian Period
  • 360 BCE

    Potash is deposited in the shallow sea that covers SK

    Carboniferous Period
  • 300 BCE

    First Amphibians

    Permian Period
  • 253 BCE

    Mass extinction in the oceans, 90% of the species disappear

    Mesozioc Era, Triassic Period
  • 200 BCE

    Sask. is again covered by a shallow sea

    Jurassic Period
  • 144 BCE

    Diamonds are brought to the surface of Sask. in volcanic pipes

    Cretaceous Period
  • 65 BCE

    Extinction of the dinosaurs

    Cenozoic Era, Tertiary Period, Paleocene Epoch
  • 55 BCE

    Climate changes, Sask's plateau develops

    Eocene Epoch
  • 2 BCE

    Ice age begins, covering Sask except for the Cypress Hills area Diamonds covered by glacial till

    Quaternary Period, Pleistocene Epoch
  • 1 CE

    Origin of the Praries

    Holocene Epoch