Strange one, this. Same place as the previous three, only looking down. The water was falling quickly - not quite the pace that a bath empties, but it feels like it - and was just at the same level as the top of one of the steps on the sea wall. And in the sloppy silt remaining on the step and the silt suspended in the water were these patterns, like something you might find on pictures of Jupiter.
The patterns were, however, quite subtle; the original looks like brown "stuff" with a line across it. To make the patterns visible took more than pushing the contrast; it was a bit like shoving it out the aircraft without a parachute... (max contrast in Lightroom, then a strong dose of Topaz Adjust).
Thanks for stopping to take a look.