have a romantic evening with this little bird
Waterbenders can melt ice though. Lava generation still seems rather out there given that a firebender as powerful as Ozai empowered by Sozin's comet couldn't put out enough energy to really liquefy Aang's rock shield. Compared to that the amount of power an earthbender would need to melt a couple of rocks much less a mountain would be second only to the avatar state. Bolin certainly doesn't seem like the most powerful earthbender to have ever lived by a huge margin, so I'm not really buying it.