33
/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
Public Timelines
Menu
Public Timelines
FAQ
Public Timelines
FAQ
For education
For educational institutions
For teachers
For students
Cabinet
For educational institutions
For teachers
For students
Open cabinet
Create
Close
Create a timeline
Public timelines
Library
FAQ
Download
Export
Duplicate
Premium
Embed
Share
Pre Cambrian Era
Category:
Other
Updated:
21 Apr 2022
0
0
291
Contributors
Created by
Isaac Hung
Attachments
Comments
Paleozoic
By
Isaac Hung
21 Apr 2022
0
0
225
Cenozoic
By
Isaac Hung
21 Apr 2022
0
0
219
Mesozoic
By
Isaac Hung
21 Apr 2022
0
0
170
Events
Thea hits Earth, causing moon to form
Oceans cover the Earth and volcanoes form islands in the ocean
Life begins with first bacteria
Supercontinent Rodinia forms
Rodina splits in two
Crustal plates move to form a new supercontinent: Gondwana
Periods
Layers of Earth form including crust, mantle, and iron core; Magnetic field of Earth forms
Meteorites rain down on Earth, bringing water and salt; Water begins to build up on Earth’s surface.
Oceans become a ‘chemical soup’ due to minerals from meteorites and ocean floor chimneys
Stromatolites (bacterial colonies) begin adding oxygen to water through photosynthesis
Oxygen levels build up in atmosphere, turning sky blue
Heat from inside Earth causes crust to break into plates (First plate tectonics)
Volcanoes pump huge amounts of CO2 into the atmosphere causing acid rain and rocks absorb acid rain causing CO2 and temperatures to drop.
Earth freezes over (Snowball Earth)
Volcanoes pump extra CO2 into the atmosphere causing temperatures to warm and Earth thaws, pumping extra oxygen back into the atmosphere. Life in the oceans begins to make a slow comeback.
Ultraviolet radiation from the sun interacts with oxygen in the upper atmosphere to begin forming ozone.
Pre-cambrian era
About & Feedback
Terms
Privacy
Library
FAQ
Support 24/7
Cabinet
Get premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL
Comments