Mountains on Titan

At www.jpl.nasa.gov/news August 12th …. Titan, a moon of Saturn, ripples with mountains – but how did they form? On earth mountains form at plate boundaries as a result of subduction, it is thought, but it is being suggested that on Titan mountains form as a result of Titan shrinking, wrinkling the surface. Apparently, a similar kind of thing might have happened on earth where the lithosphere crumpled to create the Zagros mountain chain in the Middle East.