Lithospheric Subduction on Earth and Venus?

David T Sandwell1, Emmanuel Garcia1, Dave R Stegman2 and Gerald Schubert3, (1)University of California San Diego, La Jolla, CA, United States, (2)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, (3)University of California Los Angeles, Los Angeles, CA, United States