re: ESA photos-water and hydrocarbon surface
The fig legend in the ESA thread above suggests water and hydrocarbon. “surface is darker than originally expected, consisting of a mixture of water and hydrocarbon ice. There is also evidence of erosion at the base of these objects, indicating possible fluvial activity.â€
http://www.esa.int/SPECIALS/Cassini-Huygens/SEMC8Q71Y3E_1.html.
If so it should be relatively easy to make in the lba and see how it behaves.
Andrew