John,What is your take on the various ...

John,

What is your take on the various rock slabs which seem to have signs of muddy fluid weeping from their down crater sides. They all show what looks like a buildup of mud and in the mud buildups several "High Water" marks.

This one is just below Burn's Cliff:

This one was seen as Oppy drove down the carter:

I would appreciate your and the others take on what appears to me to be muddy fluid flow sites / events.