Rover "Perseverance" on Mars

Next petrological and geological results in the Jezero Crater


Phase 2:
 On way to the deltaic deposits
 

Analysis by

Norbert Brügge, Germany
 Dipl.-Geol.

 

 

 

Sol-449 Who is "Perseverance" ?

 

Some peculiarities on the way to the Delta

       

The rover has passed the 15 m deep crater "La Orotava"
 We see stacked boulders of the ultramafic olivine rich basement.
 But what is this single bright stone ?

What is that ? An ash-cone from a mini-eruption ?

   Many "young" tectonic fault lines in the foreland of the Delta.



Tectonic fault line (not a channel)



A mysterious volcanic stone


Fragments from the eroded ash deposits of the delta !


The Delta scarp is getting closer and closer

           

The rover is approaching the delta and has photographed more interesting detail at sol-397. Surprisingly, a number of rounded stones have been documented, which normally signal activities
 of flowing water. A broken stone, however, allows a completely different conclusion. It is a hollow stone of two chambers filled with dust (?).
 
We can therefore assume that the rounded stones are volcanic geodes and /or bombs.


In the upper slope an accumulation of these rounded stones that were not formed by running water.


The Delta scarp is now in close proximity

      


A closer look at these new photos suggests an assemblage of volcanic rocks such as laminated ash and remains of lava. Nothing is fluvial.


Remnant "Kodiak": Compact and thin layered tectonically disrupted ash deposits without a real cross-bedding.

 

The theory of a former dry ice glacier is becoming more and more likely





 

 
This laminar structured deposits clearly consist of volcanic ash particles


It seems to be lava


   


 

This is an enigmatic laminar structured lava, ash or magna


Shards of thin layers of ash everywhere in the foreland

  
This photo of the delta scap at sol 427 repeatedly documents a local unconformity over tilted ash deposits. Cross-bedding, as we know it in fluvial deposits, is not plausible.
 Rather, it can be assumed that there was a time gap during the spread of the dry ice glacier. The older tilted layer have a special cause.

       
A small igneous boulder from the moraine. What kind it is can not determinate


Another small igneous rock shows reflections or bright inclusions