Crustal foundering on surface Halema'uma'u crater lava lake
Crustal foundering on surface Halema'uma'u crater lava lakeThis video, taken with a telephoto lens from an observation location on the rim, shows a process called “foundering”, in which a segment of cool lava crust on the surface of the lava lake is overridden by less-dense liquid from below causing the crust to sink into the underlying lake lava.