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Exploring Glacial Episodes: The Polar Position and Spreading Rate Hypotheses

Discover the relationship between the position of continents, glaciations at the poles, and the impact of spreading rates on the carbon cycle. Learn about the BlAG theory and the processes involving CaSiO3, CO2, CaCO3, and SiO2.

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Exploring Glacial Episodes: The Polar Position and Spreading Rate Hypotheses

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  1. Three major glacial episodes (Ice-houses)

  2. Polar Position Hypothesis: Glaciations occur when continents are located near the poles. However:

  3. Spreading Rate Hypothesis (BLAG)

  4. BLAG Carbon Cycle • On Land: CaSiO3 + CO2 -> CaCO3 + SiO2 • Subduction: CaCO3 + SiO2 -> CaSiO3 + CO2

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