Saskatchewan Geological Time Scale By roscoeismybaby 4600 BCE Earth is formed Period: 4600 BCE to 2500 BCE Archean Eon 2500 BCE Saskatchewan is part of a large ancient continent Period: 2500 BCE to 544 BCE Proterozoic Eon 1900 BCE Volcanoes in Saskatchewan 1850 BCE Wathaman Batholith (an intrusion of magma under the surface) 1800 BCE Trans-Hudson Orogen Earth changes from an anoxygenic environment to an oxygenic environment Martin Sandstone is deposited with Stromatolites 1700 BCE Erosion of the mountains 1300 BCE Uranium deposited 544 BCE Saskatchewan covered by the epicontinental Sauk Sea Hard shelled invertebrates including Trilobites Period: 544 BCE to 1 CE Phanerozoic Era Period: 544 BCE to 489 BCE Cambrian Period Period: 544 BCE to 253 BCE Paleozoic Era Period: 489 BCE to 433 BCE Ordovician Period 478 BCE Meteorite hits SK, leaving behind the Carswell Meteorite Crater Period: 433 BCE to 418 BCE Silurian Period Period: 418 BCE to 360 BCE Devonian Period 390 BCE Winnipegosis Reefs are deposited, later to become a trap for oil deposits 385 BCE Potash is deposited in the shallow sea that covers SK Period: 360 BCE to 300 BCE Carboniferous Period 355 BCE First amphibians Period: 300 BCE to 253 BCE Permian Period Period: 253 BCE to 65 BCE Mesozoic Era Period: 253 BCE to 200 BCE Triassic Period 248 BCE Mass extinction in the oceans, 90% of the species disappear 245 BCE First dinosaurs 220 BCE First mammals Period: 200 BCE to 144 BCE Jurassic Period Period: 144 BCE to 65 BCE Cretaceous Period 100 BCE Diamonds are brought to the surface of SK in volcanic pipes 70 BCE Swamps, rivers, and lakes form the badlands. Lignite is formed from the plants deposited in swamps. 65 BCE Extinction of the dinosaurs Period: 65 BCE to 2 BCE Tertiary Period Period: 65 BCE to 1 CE Cenozoic Era Period: 65 BCE to 55 BCE Paleocene Epoch Period: 55 BCE to 34 BCE Eocene Epoch 50 BCE Climate changes, Saskatchewan plateau develops. Period: 34 BCE to 23 BCE Oligocene Epoch Period: 23 BCE to 5 BCE Miocene Epoch Period: 5 BCE to 2 BCE Pliocene Epoch Period: 2 BCE to 1 BCE Quaternary Period Period: 2 BCE to 1 BCE Pleistocene Epoch 1 BCE Humans come to North America Period: 1 BCE to 1 BCE Holocene Epoch
