Talk:Lost River/@comment-69.180.29.182-20160520023927/@comment-68.111.120.163-20160527213058

It's brine; Extremely saline, high density water. Because it is denser than the surrounding water, it sinks to the bottom. A way you can test this is to get colored salt water, fresh water, and oil. Pour them one at a time (in reverse order to see the effect), and when it settles, the salty water should be at the bottom, fresh water in the middle, and oil at the top.