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Past Climates

Explore Earth's climate evolution from Snowball Earth stages 750-600 million years ago to the greenhouse Earth of the past 200 million years. Discover the impact of CO2, O2 formation, large ice sheets, and the current Ice Age. Learn about pivotal events like the K-T boundary 65 million years ago and the effects of the Chicxulub impact crater near Cancun, Mexico. Visit the link for comprehensive insights.

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Past Climates

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  1. Past Climates

  2. Snow Ball Earth between 750 and 600 million years ago.

  3. 2 Billion years ago O2 began forming in the atmosphere

  4. 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 Most of the past 200 Myr has been very warm and dominated by a greenhouse Earth. Our present state (the Pliestocene began about 2 Myr ago) http://www.atmosedu.com/Geol390/articles/RoyeretalCO2GSAToday%2704PhanerozoicClimate.pdf

  5. K-T boundary ~ 65 Million years ago. End of Dinosaurs. Evidence suggests Asteroid impact cause global cooling for several years

  6. Shock patterns in quartz

  7. Chicxulub (Chik-shoo-loob) impact crater Near Cancun, Mx. “tail of the devil”??

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