This area is thought to be a vigorously overturning lava lake, suggestive of a combination of a large mass flux of lava to the lake from a magma reservoir below the surface and a large mass fraction of dissolved volatiles like sulfur dioxide and diatomic sulfur.
This region is assumed to be an intensely boiling lava lake, implying a blend of a significant flow of lava from a magma chamber beneath the surface and a considerable amount of dissolved gases such as sulfur dioxide and diatomic sulfur.