Timeline: Geologic Time Scale | Timetoast

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