The rover "Perseverance" now has reached the delta scarp


Sol-461: The rover is now standing on outcropping ash deposits at the eroded edge of the delta


Sol-464. A breccia like conglomerate of coarse volcanic particles (ash (!?)

A porous volcanic rock with a strange and peeling coating. We have seen the same before in Phase-1 of the mission.

An interesting close-up of the ash layers invites speculation.

A suggestion:
This stratification is primary and documents periodic ash rain. They occur in large blocks in the moraine of the delta and were transported
to this position by the dry ice glacier.

In further close-ups, the structure of the deposits is clearly visible. Surprisingly, it is teeming of the "coffee bean"-like globules therein.
 And, if that is not ash, I am not a geologist anymore.