Re: Small note about meanders and a Mars example
On very steep slopes, liquid will flow too quickly to do much side cutting. It will follow the path of least resistance and thus be controlled by the terrain more than anything. As the slope lesions, the liquid would have time to meander, or at least water would. I am not sure how other liquids would behave on such a large scale on Mars or Earth’s surface.
Studying lava flows might provide some insight to how other liquids behave on Mars and Earth.