Shoreline and Drainage Channels' Network on Titan

Caption ESA originale:"This is one of the first raw images returned by the ESA Huygens probe during its successful descent. It was taken from an altitude of 16,2 Km with a resolution of approximately 40 metres per pixel. It apparently shows short, stubby drainage channels leading to a shoreline".
Il profilo di un tratto costiero, dunque: montagne (o colline), una fitta rete di canali ed una porzione di "mare" alla vista. Mare.
Già, ma un mare fatto di cosa?...