Hi All

Found this interesting article by Javier Ruiz...

<href="http://else.hebis.de/cgi-bin/sciserv.pl?collection=journals&journal=00191035&issue=v166i0002&article=436_hfadtapioot">Icarus abstract

...seems that the extensive resurfacing indicates near-surface cryovolcanic magmas [i.e. liquid water or water/ammonia] and simple heat flow calculations suggest it's not far down. Significantly low-conductivity ices, like nitrogen, enhance Triton's effective surface temperature and cause the ice-covering of the ocean to be shallow.

Lots of arguing amongst planetologists about solid-state creep and heat flow in ices. Seems convection may not be as efficient as once thought and liquid oceans may be more common. Check out this brief PDF article...

<href="www.lpi.usra.edu/meetings/lpsc2003/pdf/1139.pdf">Oceans Under Ice

Adam