More convincing hypothesis of the #JezeroRimSpherules as impact spherules by MarsGuy (youtube link)
youtu.be/5-PzwfOXUm8

Here's a preprint of the mentioned paper, Bermúdez et al "Sedimentological Signature of Impact Spherules and Their Relation to Ejecta Transport Mechanisms During the Chicxulub Asteroid Impact (Cretaceous/Paleogene Boundary)"
papers.ssrn.com/sol3/papers.cf…