Yet another Titan flyby http://saturn.jpl.nasa.gov/mission/flybys/titan20150316/ imaged the sub Saturn hemisphere and the region near Elba facula. http://en.wikipedia.org/wiki/List_of_geolo...n_Titan#Faculae Elba (named after the island off the coast of Italy, famous for being the place of Napoleon’s first exile and the third largest island of Italy) is discussed in VP’s paper of 2006. http://www.lpi.usra.edu/meetings/lpsc2006/pdf/2170.pdf
The scalloped margin of the western edge of Elba has been compared to the western edge of Xanadu. Whereas Xanadu has been shown to be at a lower elevation than the surrounding sand seas, the topography of Elba has not been so well defined. Initially speculated as the center of a great ancient impact crater, I was unable to find a more recent interpretation of the structure. NAC ISS images http://photojournal.jpl.nasa.gov/catalog/PIA08352 taken of the region in 2006 seem to hint at channels on and around the SW portion of Elba suggesting fluvial erosion mechanisms may have had a part in the scalloped margins.
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