The Salt is the (monetas page description)
The Salt was once nothing but ocean, with absolutely no end, from one side to the other. The tectonic plates slowly started to drift islands further and further out.
(One larger-ish continent, that seems to be the ‘main’ hub continent, was the first to float out, and was large enough to populate that hemisphere. But that island slowly started breaking apart as well, to become smaller. Timeline?
Higher sodium volume or something?