Contents

27 August 2010
Vol 329, Issue 5995

About The Cover

Cover image expansion

COVER Dynamic interaction of tectonic plates in the southwest Pacific Ocean computed from a fl ow model of Earth's interior (arrows show predicted velocity). The computational mesh, for which color represents viscosity (yellow, softer; blue, stiffer), is refined to resolve the forces in the deep mantle that are coupled directly into the edges of plates through narrow slabs. Red lines indicate low-viscosity zones corresponding to plate boundaries. See page 1033. Image: Georg Stadler, The University of Texas at Austin