Check out what they say about
turbidity currents

Is this the
picture you are looking for? If you look closely, you can see channels starting from small craters. Are these springs? That is what I thought when I first looked at this picture 2 years ago. These channels are located below the highlands to the south. Any aquifer would drain down. If it came close to the surface in this lowland it could come out where craters have punctured the surface. If the water source was renewed, the craters would ice over, as would the channels.

I suspect this was a shoreline to the Northern Ocean when Mars had a denser atmosphere of CO2. Just to the north of this area is what looks like active glaciers. I wish they would send some probes to this whole region of Mars.