2.6 Saskatchewan Time Scale

By erincampbell564
  • 1 CE

    Humans come to North America

  • 1 CE

    Bison come to North America

  • 50

    Climate changes and SK plateau develops

  • 65

    Dinosaurs are extinct

  • 75

    Shallow sea begins to retreat

  • 213

    SK is covered by shallow sea (again)

  • 220

    First mammals

  • 245

    First dinosaurs

  • 248

    Mass extinction in the oceans

    90% of the species disappear
  • 355

    First amphibians

  • 385

    Potash is deposited in the shallow sea that covers SK

  • 470

    Tyndall Stone deposited as massive limestone

  • 478

    Meteorite hits SK

    leaves a crater called the "Carswell Meteorite Crater"
  • 544

    SK covered by epicontinental Sauk Sea hard shelled invertebrates

    includes Trilobites

  • Erosion of the mountains

  • Earth changes from an anoxygenic environment to an oxygenic environment

  • Wathaman Batholith

    an intrusion of magma under the surface

  • Volcanoes in SK

  • Break up of ancient continent

    creation of a large ocean

  • SK is part of a large continent

  • Earth is formed