texture and patterns

Ship worms perhaps?

Ripple in the sand left by the tide.

I'm just not sure what this one is, but amazing and beautiful. Like veins, maybe an animal.

I am always impressed by the patterns and textures I find in nature. Some are left by animals others left by the elements. I admire each of them, they are beautiful. Inspiring to see, I keep walking just to see what else I see.