[X] My Assistant

[Guest_AlexBlackwell_*]

For what it's worth, a recent presentation by the Cassini RADAR Team (Rosaly Lopes et al.), entitled "The Surface of Titan as seen by the Cassini Radar Mapper," is now publicly available (~10.55 Mb PDF).

[David]

I'm astounded by the regularity of these "scratch" features (they really look more like the grooves on a record now), and how they extend for many miles (what's the scale?) parallel to each other before joining or splitting. Are there Earth (or Mars) dunes that show the same sort of extension? Or is this really a new type of landform?

[JonClarke]

I'm astounded by the regularity of these "scratch" features (they really look more like the grooves on a record now), and how they extend for many miles (what's the scale?) parallel to each other before joining or splitting.  Are there Earth (or Mars) dunes that show the same sort of extension?  Or is this really a new type of landform?

Terrestrial longitudinal dunes can be hundreds of km in length. Much of central Australia looks remarkably like Titan. Almost enough to feel at home!

See http://www.uow.edu.au/science/eesc/staff/g...aeolduneca.html

http://www.diamantina-tour.com.au/outback_...ys/dune_sys.htm

http://disc.gsfc.nasa.gov/geomorphology/GE...PLATE_E-17.HTML

http://disc.gsfc.nasa.gov/geomorphology/GE...PLATE_E-18.HTML

Jon

[ljk4-1]

These polar features on Mars remind me of Titan's cat scratches:

http://photojournal.jpl.nasa.gov/catalog/PIA03649

Any similarities possible?