99 Years Later... We Solved It

In Spain as in Salt water I have dove in Guam or other salt water and when it rains hard water seems to stay in climes or layers  I think in rare specific temperatures and events rain and osmotic or normal tendencies of solution are slowed , then adding freezing temperatures ice can & does occur whether it or source of cooled or supercooled water fall from above it a stream or river. Note : water can flow @ 70°F if it is moving fast enough molecularly to not cause freezing when it is slowed enough for crystals to occur it starts freezing. This may be happening in that "impossible region" of salt water lake or water in Spain . . . .  Something to think about. I once surfed in fresh water in the ocean river outlet around Guam Island reason & proof muddy water in torrential rail showed sediment in fresh water separated from clear salt water huge volumes of cold rain water during event which did not mix as readily as homogeneous equal warm oceans water temperatures,  well I'll call it a water strato-clime (spelling?)
For some reason volume of differing water temperatures do not always] exibit the scientific tendency of less dense solution to move more dense solution as readily as they so often seem to. In this case a light soil caused in effect a dye solution to fresh rain water. Add monsoon volumes of precipitation being cooler and dumped in mass upon saturated or full basin flood levels of rain exit brackish mixed River meets ocean bays. 
Good day, David