I was surprised to find such distinct sculpting of the sand by the flow of the ebb tide on my walk this week along the beach at Crymlyn Burrows in Swansea Bay. The sand banks were noticeable on the beach but even so, the flow of water that created these deep ridges must have been fast. Perhaps there was some other environmental influence of which I was not aware.
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The first shot in the sequence below is a particularly interesting mix of flowing sand and flowing water patterns. I guess the sand on the upper edge of the sand bank started flowing with the water it held after the sea had subsided to a level to allow this – fascinating nature yet again!