The Geologic Time Scale - Ariel Thom

ARCHEAN EON, 4600 Million Years Ago

Feb 23, 1960

The Earth is formed.

Geological Time Scale, accurate dates are in titles, ignore the 1960-2030 dates!!

Period: Feb 23, 1960 to Feb 23, 2030

PROTEROZOIC EON, 2500 Million Years Ago

Jan 23, 1966

Saskatchewan is part of a large ancient continent (supercontinent).

2100 Million Years Ago

Sep 24, 1968

The ancient supercontinent breaks up, a large ocean is created.

1900 Million Years Ago

Sep 25, 1971

Volcanos in Saksatchewan.

1850 Million Years Ago

Oct 25, 1973

Wathaman Batholith (an intrusion of magma under the surface).

1800 Million Years Ago

Feb 25, 1975

-Orogeny (mountain building) Trans-Hudson Orogen.

-Earth changes from an anoxygenic environment to an oxygenic environment.
-Martin Sandstone is deposited with Stromatolites (mounds created by blue-green algae).

1700 Million Years Ago

Dec 25, 1976

Erosion of the mountains.

1300 Million Years Ago

May 25, 1979

Uranium deposited.

CAMBRIAN Period. 544 Million Years Ago

Dec 23, 1983

Also the Phanerozoic Eon and the Paleozoic Era, Saskatchewan is covered by the epicontenental Sauk Sea,
Hard shelled invertebrates exist including Trilobites.

ORDOVICIAN Period, 489 Million Years Ago

Dec 24, 1986

Saskatchewan is covered by the epicontenental Sauk Sea,
Hard shelled invertebrates exist including Trilobites.

478 Million Years Ago

Feb 25, 1988

Metorite hits Saskatchewan, leaving behind the Carswell Meteorite Crater.

470 Million Years Ago

Dec 25, 1989

Tyndall Stone deposited as massive limestone.

SILURIAN Period, 433 Million Years Ago

May 24, 1991

DEVONIAN Period, 418 Million Years Ago

Nov 24, 1993

390 Million Years Ago

Dec 25, 1995

Winnipegosis Reeds are deposited, later to become a trap for oil deposits.

385 Million Years Ago

Sep 25, 1997

Potash is deposited in the shallow sea that covers Saskatchewan.

CARBONIFEROUS Period, 360 Million Years Ago

Dec 24, 1999

355 Million Years Ago

Jan 26, 2002

First amphibians.

PERMIAN Period, 300 Million Years Ago

May 24, 2004

TRIASSIC Period, 253 Million Years Ago

Jul 24, 2006

Also the Mesozoic Era.

248 Million Years Ago

Oct 25, 2008

Mass extinction in the oceans, 90% of the species disappear.

245 Million Years Ago

Jan 25, 2010

First dinosaurs.

220 Million Years Ago

Jan 25, 2011

First mammals.

213 Million Years Ago

Jul 25, 2012

Saskatchewan is again covered by a shallow sea.

JURASSIC Period, 200 Million Years Ago

Aug 24, 2013

CRETACEOUS Period, 144 Million Years Ago

Jan 24, 2015

100 Million Years Ago

Sep 25, 2016

Diamonds are brought to the surface of Saskatchewan in volcanic pipes.

75 Million Years Ago

Jan 25, 2018

Shallow sea begins to retreat.

70 Million Years Ago

Jan 25, 2019

-Swamps, rivers and lakes form the badlands.
-Lignite (brown coal) is formed from the plants deposited in swamps.

66 Million Years Ago

Jan 25, 2020

Triceratops roam Saskatchewan.

TERTIARY Period, 65 Million Years Ago

Nov 24, 2020

-Also the Cenozoic Era and Paleocene Epoch.
-Extinction of the dinosaurs.

EOCENE Epoch, 55 Million Years Ago

Jan 24, 2022

50 Million Years Ago

Feb 25, 2023

Climate changes, Saskatchewan plateau develops.

OLIGOCENE Epoch, 34 Million Years Ago

Apr 24, 2024

MIOCENE Epoch, 23 Million Years Ago

Aug 24, 2025

PLIOCENE Epoch, 5 Million Years Ago

Feb 24, 2027

QUATERNARY Period, 2 Million Years Ago

Jun 24, 2028

Also the PLEISTOCENE Epoch. The Ice Age begins, covering all of Saskatchewan except for the Cypress Hills Area.

0.05 Million Years Ago

Sep 25, 2029

Bison come to North America.

0.02 Million Years Ago

May 25, 2030

Humans come to North America.

0.01 Million Years Ago

Dec 25, 2030

Orgin of the Praries.