EGU General Assembly 2008
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  Information - IS4 - BG7.2/SSP34 The Early Earth: inside, out and alive (co-sponsored by the ESF research network "Archean Environment" & EAG; co-organized by BG & SSP; co-listed in GD, GMPV, MPRG & TS)

Event Information
The early history of the Earth (roughly the first 2 billion years) was a time of profound change in both the interior and exterior of our planet, and was the time during which life emerged. Improvements in analytical and numerical techniques are producing increasingly detailed observations of this important, but poorly preserved time period. In this session we would like to bring together scientists from a range of fields to discuss the new observations and models, and in particular to discuss the interaction and possible feedbacks between the changes seen in the interior and those at the surface. Did the rise of oxygen affect the mantle? Did higher melt production and/or large melting events affect ocean/atmospheric chemistry? When did plate tectonics begin? Was there a magnetic field, and if not, when did it start? How did these changes affect the early life that was just emerging, and how did that life, in turn, affect the ocean-atmosphere system? What insights does the early Earth provide for the evolution and habitability of other planets, both inside and outside our solar system? We would like to solicit contributions from all fields that study the early Earth, including biogeosciences, mantle/crust geochemistry, paleoceanography, mantle dynamics, atmospheric dynamics, planetary science and paleomagnetism.

Preliminary List of Solicited Speakers

ESF research network "Archean Environment"

General Statement
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