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4600 BCE
Earth is formed.
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2500 BCE
Saskatchewan is part of a large ancient continent.
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2100 BCE
Break up of the ancient continent, creation of a large ocean.
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1900 BCE
Volcanoes in Saskatchewan
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1850 BCE
Wathaman Batholith (an intrusion of magma under the surface
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1800 BCE
Orogeny (mountain building) Trans-Hudson Orogen. Earth changes from an an oxygenic environment to an oxygenic environment. Martin Sandstone is deposited with Stromataolites (mounds created by blue and green algae).
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1700 BCE
Erosion of the Mountains
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1300 BCE
Uranium deposited
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544 BCE
Saskatchewan gets covered by the epicontinental Sauk Sea. Hard shelled invertebrates including Trilobites.
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478 BCE
Meteorite hits Sask, leaving behind the Carswell Meteorite Crater.
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470 BCE
Tyndall Stone deposited as massive limestone
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390 BCE
Winnipegosis Reefs are deposited, later to become a trap for oil deposits.
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385 BCE
Potash is deposited in the shallow sea that covers Saskatchewan.
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355 BCE
First amphibians
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248 BCE
Mass extinction in the oceans, 90% of the species disappear.
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245 BCE
First Dinosaurs
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220 BCE
First Mammals.
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213 BCE
Saskatchewan is again covered by a shallow sea.
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100 BCE
Diamonds are brought to the surface of Sask in volcanic pipes.
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75 BCE
Shallow sea begins to retreat.
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70 BCE
Swamps, rivers, and lakes from the badlands. Lignite (brown coal) is formed from the plants deposited in swamps.
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66 BCE
Triceratops roam Saskatchewan
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65 BCE
Extinction of the dinosaurs
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50 BCE
Climate changes, Saskatchewan plateau develops
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2 BCE
Ice age begins, covering Sask except for the Cypress Hills area. Diamonds covered by glacial till.