It appears from color stills that the rounded and very oriented pattern on the far left side of the prior images is in other colors than infra-red, actually a continuous scene of the sheeted, patterned repeats of the main body of the icy scarp slope. I believe it is worthwhile to study the reason for the difference in characteristic shapes of the oriented and repeat sharp edged shapes. In the IR gray-scale image, the largest file and the most detailed usually, the roundedness could be a measure of a surface of ice over solid ciy rock or more opaque ice/dust.
The veins and lodes of ice or other material which can be seen across the scarp slope are different at differing elevations, different angles of incidence, and possibly different solid materials.
It is common for the veins and recesses to be well oriented in one to several directions,
I have presented below small caves or deep recesses of crater shapes, vein linear removal crevice/recesses or caves, and find that these are all above the steep alcoves and gully formations midway down the scarp/cliff face.
It appears some ice gathers or appears from some source within a number of the sharp edged craters on the slope, but other craters have no visual ice in blue color.
The craters with deeper dark recesses seem to have no blue coloration, but the original images may not have a correct shadow color balance, therefore the blue may be hidden if present in the examples here.
Extreme lightening of the images shows the reddish shadow color of the originals. That also is causing much of the pink to reddish tint in the atmosphere as well, in other imaging from the HiRISE and rovers. I will watch for additional examples at this location for a color balance basis.
The anigif below is of the blue icy shallow ledge of the topic images through entry #2.
I see in the RGB image the angular non-rounded sections of the routine surface pattern where a rounded cluster appears in the grayscale.
The overview in grayscale as an anigif. The upper shallow ledges, with craters and veins/deposits from upper to mid-range, and the alcoves and gully formations at lower elevations. Below the bottom of this frame are floor deposits with unusual pond or crater patterns. Material is well differentiated in some. The originals are well worth studying.
This is one of the shadowed recesses which are at the crater shapes. Some of these are at blocky rises which have recesses apparently. It appears some may be deeper than the visual lighting allows us to see.
Some of these are found at or have caused linear vein or fracture lines and intersections. Removal of the fracture/vein materials appears to be the cause or result of crater formations.
Another oriented recess at a crater location. These show that the craters and the vein/fractures are related, with the recesses related to at least some of the craters.
Other anigifs of differing image numbers and timing will be found adjacent to these images.
Does this show that the deeper recesses are caves or evacuations of fracture/veins? Which caused the other?
How much gas release occurs or occured at the recesses over time?