2.6 Saskatchewan Time scale

Earth is formed

4600 BCE

SK is part of a large ancient continent

2500 BCE

Breakup of the ancient continent

2100 BCE

creation of a large ocean

Volcanoes in SK

1900 BCE

Wathaman Batholith

1850 BCE

an intrusion of magma under the surface

Orogeny, mountain building

1800 BCE

earth changes from an anoxygenic environment to an oxygenic environment. Martin sandstone is deposited with stromatolites

Erosion of mountains

1700 BCE

Uranium deposited

1300 BCE

SK covered by the epicontinental Sauk Sea

544 BCE

Hard shelled invertebrates including Trilobites

Meteorite hits SK

478 BCE

Leaving behind the Carswell Meteorite Crater

Tyndall Stone deposited as massive limestone

470 BCE

Winnipegosis Reefs are deposited

390 BCE

later to become a trap for oil

Potash is deposited in the shallow sea that covers SK

385 BCE

First amphibians

355 BCE

Mass extinction in the oceans

248 BCE

90% of the species disappear

First dinosaurs

245 BCE

First mammals

220 BCE

SK is again covered by a shallow sea

213 BCE

Diamonds are brought to the surface of SK in volcanic pipes

100 BCE

Shallow sea begins to retreat

75 BCE

Swamps. rivers and lakes form the badlands.

70 BCE

Lignite is formed from the plants deposited in swamps.

Triceratops roam SK

66 BCE

Extinction of the dinosaurs

65 BCE

Climate changes, Saskatchewan plateau develops

50 BCE

Bison come to North America

5 BCE

Ice age begins, covering SK except for the Cypress Hills area

2 BCE

Diamonds covered by glacial till

Humans come to North America

2 BCE

Origin of the Prairies

1 BCE