Some more rocket science then: if you take an SSS, make it a line, and warp this by a redirect, PF and warp shader, you have a warped line. Double this, and add a similarly warped set of horizontal stripes (Y-repeated grayscale image map). That's the basics. Up to you to make it work together and refine.
@TheOne: Thanks, but if I take it more to land, you can't see all features well enough in a small render. This is more to make a lot of different features work together than it is meant to be real. You might see it as an old side track that is slowly giving way to higher tides, due to warming up of the planet...
I might add an old signpost, overgrown by ivy, but I have to make that yet.