Looking at an image taken by Mars Odyssey THEMIS (Thermal Emission Imaging System) camera of an unnamed crater in Aonia Terra region I noticed what looks like grooves or ridges that resemble a stair like pathway, in what seems like perpendicular direction to water flow.
Here is the Aonia Terra Region of the image:
Here is the full image from THEMIS:
Finally, here is the closeup of the area I am talking about:
As you can see, on the top-left corner, there seems to be what looks like water outflows, which suggests to me that that corner of the region is "lower" than the other circled area in the lower center of the image.
Question is, what could create these ridges that look like stairs or a pathway?