Snowball Earth. Snow Ball Earth between 750 and 600 million years ago.
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Transcript of Snowball Earth. Snow Ball Earth between 750 and 600 million years ago.
![Page 1: Snowball Earth. Snow Ball Earth between 750 and 600 million years ago.](https://reader033.fdocuments.in/reader033/viewer/2022061305/551462e35503462d4e8b59dc/html5/thumbnails/1.jpg)
Snowball Earth
![Page 2: Snowball Earth. Snow Ball Earth between 750 and 600 million years ago.](https://reader033.fdocuments.in/reader033/viewer/2022061305/551462e35503462d4e8b59dc/html5/thumbnails/2.jpg)
Snow Ball Earth between 750 and 600 million years ago.
![Page 3: Snowball Earth. Snow Ball Earth between 750 and 600 million years ago.](https://reader033.fdocuments.in/reader033/viewer/2022061305/551462e35503462d4e8b59dc/html5/thumbnails/3.jpg)
2 Billion years ago O2 began forming in the atmosphere
![Page 4: Snowball Earth. Snow Ball Earth between 750 and 600 million years ago.](https://reader033.fdocuments.in/reader033/viewer/2022061305/551462e35503462d4e8b59dc/html5/thumbnails/4.jpg)
http://www.atmosedu.com/Geol390/articles/RoyeretalCO2GSAToday%2704PhanerozoicClimate.pdf
CO2 has been a driver of Climate for Millions of years. (phanerozoic 550 Mya to present)
There have been large ice sheets during the Phanerozoic ~300 Mya
Our present Ice age began around 2 MYa
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Most of the past 200 Myr has been very warm and dominate by a greenhouse Earth. Our present state (the Pliestocene began about 2 Myr ago)
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K-T boundary~ 65 Million years ago.
End of Dinosaurs.
Evidence suggests Asteroid impact cause global cooling for several years
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Shock patterns in quartz
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Chicxulub (Chik-shoo-loob) impact crater Near Cancun, Mx.“tail of the devil”??
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