Rover "Perseverance" in the enigmatic landscape "South Seitah"

Norbert Brügge, Germany


On Sol-201 the rover left "Artuby Ridge" and will made a detour to northeast into the landscape "South Seitah". It is a chaotic jumble of tilted igneous rocks. The partially slab like condition of the boulders and the horizontal cracks in it, are puzzling. It could have tectonic causes (e.g. horizontal vibrations). Some rocks look like the "paving stones", others resemble the already well-known boulders of "Artuby Ridge". Altogether, there are no differences to the rocks found so far in the Jezero Crater. Only the proportion of phenocrysts of olivine seems, as already known, to fluctuate. The large hornblende crystals are dominant in the groundmass.

The first impression is that this landscape was exposed to extensive tectonic movements and we see broken parts of uplifted bedrock here. So far, we can only speculate about the age of the tectonic movements. If the former moraine extended into this region, then these ridges are of younger origin. The Jezero crater is not an impact crater, but an old magma dome, collapsed by tectonic movements.

Sol-206: The rover has abraded a spot one of the flat stones with its tool. Close-ups show that this are no deposits of volcanic ash or sediment.