Is the Jezero Crater a landscape of an wind-eroded glacier moraine?

(and the delta is an eroded remnant of the moraine)

Norbert Brügge, Germany
Dipl.-Geol.
  

The hope that rover Perseverance's mission will find traces of life could bern not come true. The photos available so far from the mast- camera suggest that the landsscape in the Jezero crater is a wind-eroded glacier moraine, and the delta is the eroded remnant of the glacier moraine. The deposits in the delta are stratified, but contain a lot of boulders. Such boulders are abundant in the run-up to the delta. All boulders are remnants of the eroded part of the formerly larger delta. "Fresh" boulders are slightly or not rounded and do NOT indicate transport by running water. The moraine contains both dark and also bright (disintegrated) boulders that should come from above the crater. The stratification of the fine sediments in the delta can only mean periodic activities of the glacier. The fine parts in the moraine probably consist of grains from completely disintegrated boulders, mixed with the decomposed olivines,so as we be found the mix on the bottom of the crater. The different stages of disintegration of the boulders are an indication of the age of their entry into the moraine. The "fresh" boulders are part of the upper part of the moraine. In the sandy elevations in the crater, in which boulders of different ages are stacked, are almost completely missing the blown-out fine components of the moraine. The areas in the crater in which boulders are missing could have been deeper parts in the relief in witches the boulders are buried.

Conclusion: Dear colleagues, there was no lake that was 100 m deep.

 

   
The zoom view of an isolated remnant of the delta shows evenly layered bank-like deposits.
The numerous unrounded boulders along the eroded front edge of the delta are striking.





Edge of the delta in an eroding state









In the foreground type of "fresh" boulders from the already eroded part of the moraine





    

Striation on boulders by ice movement ?



What an impressive photo. It exclude that this stack was created by running water or in a lake

 

  Fluvial cross-bedding in the delta is that NOT. This are secondary structures that were come by periodic ice pressure