Patterns on the shore

Poor Nick is really suffering with the cold that I passed on to him. These things always go straight to his chest so I took a drive over to Tobermory to get him some cough and cold remedies from the pharmacy. It was a beautiful day so I took a few minutes to enjoy the sunshine. The tide was out and I noticed these lines of green seaweed in amongst the brown of the more usual weed and the mud. It looks like the green weed may have grown on a couple of mooring ropes that have since disappeared in the mud. That’s my theory, but I’m open to other suggestions.