re: Phoebe...
Marcia — (archived)
Phoebe:
http://saturn.jpl.nasa.gov/multimedia/images/small-moons/images/PIA06063.jpg does look 'crumpled'. It looks brittle too (obviously) as associated with ice. Somewhat like Comet Wild 2 below:
http://stardust.jpl.nasa.gov/news/status/040106.html
I hope the links came through alright.