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Mixing it up

Mixing it up
Mixing it up Bouchard found the rocks in Perseverance to mostly be “members of Endeavour Crater impact breccia” or Shoemaker Formation. But he did find that the Parral and Mesilla cobbles had distinctly different compositions when compared to the rest of the valley rocks. Turns out, Parral is “highly similar” to the Matijevic Formation targets Fullerton and Azilda, he said, but without any newberries. Parral and Mesilla, he suggested, may have come from someplace else, “most likely somewhere up-valley,” and then were transported by an as yet unknown mechanism to their current sites. NASA / JPL-Caltech / UA / NMMNHS / M. Brouchard / L.Crumpler