These may be rinds of salt/dust material left o...

These may be rinds of salt/dust material left over from ice sublimation.

When ice forms on the surface of earth in dusty or sooty areas the dust/soot is incorporated into the growing body of the ice. When the ice melts away (day by day) sometimes you can see concentric layers of soot/dust. Each layer represents the soot/dust deposited by ice melting and water evaporation during a warm day.
The layers are concentric because the ice chunk is shrinking each day, leaving behind non-volatile residue.

On Mars, at this location, we have ice that builds up seasonally and then sublimates away during warmer seasons (such as we are now in).

The ice accumulates over daily cycles and dust/salt is blown onto the accumulating ice from time to time. When the ice sublimates away the dust is concentrated on the surface layer of the sublimating chunk of ice. Cycles of ice block shrinkage deposit concentric circles and filaments of dust/salts. Each warmer sublimation cycle would result in shrinkage of the outer edges of the ice block. As the ice block shrinks it's former edges are marked by a filament, coil or roundish filament.

I hope that there is a less mundane explanation for these fascinating structures. If life were involved here, the surface of a sublimating block would probably be a great place to be. The microbes would have sun and water. Maybe these filaments represent the dried remains of microbial life that lived on the surface of sublimating ice blocks. It is possible that there may be dormant spores and microbe remains in these filaments. These may be relatively recent, from the past winter or few. I wonder if the seasonal ice has preferential nucleation sites where ice forms first each season and accumulates the most in these areas.

There must be some way to show if these odloid/ellipsoid/loops result from ice block sublimation deposition.