DISCUSSION: When and How did Plate Tectonics Begin, What Came Before, and Why is this Controversy important for Understanding the Earth and Exoplanets?

Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, United States, Taras Gerya, ETH Zurich, Department of Earth and Planetary Sciences, Zurich, Switzerland, Stephan V. Sobolev, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Paul Tackley, ETH Zurich, Zurich, Switzerland