The Snowball Earth Hypothesis - Atmospheric and Oceanic Sciences

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But then methane comes in…• Large amounts of organic matter would havebeen trapped under ice sheets on land during theNeoproterozoic• Methane released when this matter decomposedwould have remained trapped in this ice• Then when the ice started to melt, ice sheets onland close to the oceans would have beenflooded by rising sea levels and the methaneslowly released
Did this methane contain high levels of 12 C orwas it the lack of photosynthesis?• This methane that was trapped under the icewould have contained high levels of 12 C aswell• This could have caused the skewed isotoperatios seen in the cap carbonates
Page 5: Neoproterozoic Snowball Era• This
Page 11 and 12: Conclusions from Paper 1• Widespr
Page 13 and 14: However…• If this were the case
Page 15 and 16: Therefore…• There is more evide
Page 17 and 18: Carbon Isotope Theory• Marine mic
Page 19: No light - No photosynthesis!• Th
Page 23 and 24: Conclusions:Four proposed stages of
Page 25 and 26: Conclusions…
Page 27 and 28: Vostok delta TS4oC2HoloceneIntergla
Page 29 and 30: Vostok CH47006506005505004504003503
Page 31: References• Schrag, Daniel P., Be

The Snowball Earth Hypothesis - Atmospheric and Oceanic Sciences

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