A couple of additional altered views of the original at the topic post link. I find the very softened and nearly hidden chains to be a real treat as most of the major features viewable in the image are the more recent dominating impacts, and the very solid looking ridge like linear processes which criss-cross the image. The chains of pits give a view into more geological historical distant events, which may have been a terrain type less prone to occurrence in recent geologic history.
Whether the pit chains are of volcanic result or directly impact produced, the deposits within them should be far more ancient than surface regolith. Less exposure, and capillary confinement may have provided a environmental zone of some protection, as has been shown to exist without doubt on Mars in the last few years mission results.
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Bright highlights here are distinguished to show these are not high thrown ejecta rims, although they are along the rim margins of possible impact or volcanic crater type depressions. These are elevated but subdued, possibly long term linear chains of either eruptive or collapse processes, probably along weakness faults. The pits indicate either a collapse/subsidence, or loss of content along the patterned chains.
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The area is dominated by linear features which compete with the impact crater shapes. Even Mars moon Phobos is dominated by these very old to newer linear features. Pit chains are possibly ready made reservoirs for various chemistry not seen at the surface.
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The above were a series of study images from the linked original. I suggest you try to study the newer pit crater/fault lineages in comparison to the very reduced and apparently aged related chain sections.
Have there been any results in the mission as yet?
