Re: Meanders, Mars, and Fluids.
Here's a classic example of Meandering channels developed at 4 km depth in a deep marine environment...
Bigger image here showing the meanders Slow download but worth it to see them.
As it happens, I'm off to Jakarta next week to give a course on seabed morphology in varying depositional environments and how to recognise them on seismic data. That should pay for a few hot dinners all round!