QUOTE (ngunn @ Jan 23 2012, 05:13 PM)
... Lots of questions beckon, as always with Titan. If the dune material descends from the hydrocarbon haze this presumably happens at all latitudes, so what happens to it north and south of the tropical dune zone ...
and of course in the Xanadu region which lies WITHIN the tropical zone at a LOWER elevation than the surrounding dune seas and presumably is OLDER geologically than the dune fields!