The Geology of Jezero Crater, Observations & Findings |
The Geology of Jezero Crater, Observations & Findings |
Feb 24 2021, 01:41 AM
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This thread is for those rockhounds among us to discuss the new terrain we'll see as Perseverance scoots around her new home. Let's get dirty & technical!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Mar 9 2021, 10:20 AM
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#2
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Member Group: Members Posts: 240 Joined: 18-July 06 Member No.: 981 |
Do we have any insight as to why the small deltaic remnants exist at such a distance from the main delta front? Did they move somehow from where they were emplaced? What could cause the significant and remarkably complete (scoured clean down to the top of the underlying unit) erosion of the delta material and what saved these remnants which are presumably analogues of the main delta. Could they have been islands in the lake?
The interesting one (to me) to the north looks much like a volcano from above with no clear evidence of stratification. There are some concentric dust rings that might relate to strata but it’s hard to be sure. Getting a close look at that might yield some useful information about the delta and the erosional processes that have sculpted the front. |
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Mar 9 2021, 12:14 PM
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#3
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
QUOTE Do we have any insight as to why the small deltaic remnants exist at such a distance from the main delta front? Did they move somehow from where they were emplaced? What could cause the significant and remarkably complete (scoured clean down to the top of the underlying unit) erosion of the delta material and what saved these remnants which are presumably analogues of the main delta. Could they have been islands in the lake? The interesting one (to me) to the north looks much like a volcano from above with no clear evidence of stratification. There are some concentric dust rings that might relate to strata but it’s hard to be sure. Getting a close look at that might yield some useful information about the delta and the erosional processes that have sculpted the front. Remember the entire area may have dropped 2 km and tilted during the millions of years of Tharsis volcanism. Then is probably tilted again during the Isidris basin volcanism. During the era of the Arabia Ocean Jezro could have been a coastal crater partially below sea level. Tharsis volcanism would have dropped Jezro up to 2 km below the Arabia Ocean sea level (if that ocean was still there). During the later era of the Deuteronilus Ocean, Jezro could have been an inland lake feeding into a great lake in Isidris. QUOTE ARE WE VISITING THE COASTLINES OF MARS? LOAD-CORRECTED PALEO-OCEAN LEVELS AT
JEZERO, OXIA PLANUM, AND GALE. R. I. Citron , M. Manga , D. Hemingway and A. Plattner https://www.hou.usra.edu/meetings/lpsc2021/pdf/1605.pdf |
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