Re: M1901170
Most of the local craters with big dune fields have some sort of channel/gullies associated with the highest dunes. Rabe, Proctor, and Kaiser craters all have at least some such features.
I continue to beleive that we're not seeing fluid making its way to the tops of the highest dunes, but are seeing something else.
Either a dry avalanche is somehow focussing into these channels (unlikely), or defrosting ices are implicated (more likely).