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  Information - US10 Great Debates in the Geosciences

Event Information
The session will consist of two debates on current controversial issues. In each debate, one team of two speakers will present one side of the issue and the opposing team will present the other side. At the start the moderator will give a 10 minute overview, to introduce the audience to the subject. The main aims are to inform the broad geosciences community of both sides of the debate on selected controversial subjects.
The subjects to be debated are:
- Oxygenic photosynthesis appeared on Earth at least 3.8Ga ago
- Flood volcanism is the main cause of mass extinctions

Preliminary List of Solicited Speakers
Oxygenic photosynthesis appeared on Earth at least 3.8Ga ago
Moderator P Falkowski
Proponent: M. Rosing, M. Russell
Opponent: J. Kirschvink, F. Westall

Flood volcanism is the main cause of mass extinctions
Moderator - A Saunders
Proponent: Thor Thordarson, Vincent Courtillot
Opponent: Jan Smit, Luann Becker


General Statement
The information contained hereafter has been compiled and uploaded by the Session Organizers via the "Organizer Session Form". The Session Organizers have therefore the sole responsibility that this information is true and accurate at the date of publication, and the conference organizer cannot accept any legal responsibility for any errors or omissions that may be made, and he makes no warranty, expressed or implied, with regard to the material published.

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