Almost a "companion" paper, putting the Margin Unit in context with Séitah, thanks to all the rover's observations (mostly MCZ spectra) & comparing them with orbital ones.

From Jan 2026, Ravanis et al: "Formation and Alteration of Olivine-Carbonate Rocks Within Jezero Crater as Constrained by In Situ Visible/Near-Infrared Multispectral Images"
https://doi.org/10.1029/2025JE009151

#JezeroMarginUnit

@65dBnoise let the record show 😉 this stuff is interpreted as xenoliths in Williford et al: https://www.science.org/doi/10.1126/science.adu8264

Fig S4, mentioned 1+2x times in the paper:

"N Margin outcrops close to this contact are similar to exposures S of the channel, but one contains diverse, cm-scale features (fig. S4) that were not observed elsewhere; these could represent altered xenoliths."

[EDIT]: removed the 2nd mention which came from the rejected pyroclastic formation hypohesis.

#JezeroMarginUnit

Hard to catch up with all the science when papers for 2 years of #PerseveranceRover campaigns (upper delta, margin unit and #NeretvaVallis / #JezeroBrightAngel) all get released within a few weeks 🤦‍♂️

Jones et al: "A Fluvio-Lacustrine Environment Preserved in the Jezero Crater Inlet Channel, Neretva Vallis"
https://doi.org/10.1029/2025JE009420

#JezeroDeltaScience #JezeroMarginUnit

There's also a reference to a new paper on the margin unit, with an excellent sketch of its proposed formation and alteration.

Williford et al : "Carbonated ultramafic igneous rocks in Jezero crater"
https://www.science.org/doi/10.1126/science.adu8264

#JezeroDeltaScience #JezeroRimScience #JezeroMarginUnit