Fascinating pic, definitely one for the Weird Mars Image Hall of Fame.

I've rotated the image various ways, and I still am not convinced that these are channels (indentations)rather than raised features. It seems to me that if they were channels, they would merge more often than they do - many run parallel to each other for long distances without merging. There are some points where they do combine, mostly near the ridge or where other channels converge, leaving no other path for intermediary ones, but I can't see how two channels could run so close together without combining if it's a flow-and-dissipate mechanism that produced them. Could there have been a flow that solidified and remained there? If they occured at different times, it would explain the parallel paths - later ones simply tracked along the raised edge of older ones. This might explain why there is no terminal pile - the flow material simply solidified and stopped. Or could a flow material "plough" up an edge that would discourage adjacent channels from merging?

Alternately, could these possibly be the eroded edges of a stratified deposit, lifted at an angle by tectonics, volcanism or impact crater formation? I don't know how the ridge end would fit into this, just an idea.

As with so many other features, this one cries out for an on-site geologist.