Dawn Survey Orbit Phase, First orbital phase |
Dawn Survey Orbit Phase, First orbital phase |
Jul 17 2011, 09:09 AM
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#1
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
I think it's time we start a new thread
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Aug 25 2011, 10:30 PM
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#2
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Member Group: Members Posts: 714 Joined: 3-January 08 Member No.: 3995 |
My arm-waving interpretation of the surface within the South Pole Basin :
[attachment=25375:Vesta_so...volution.PNG] Here, sections of the rim slump down and crumple as they slide against and around the central mound. More slumps slide down and deform the existing deposits. After awhile, there is a (*subtly*) Enceladus-like jumbled mess. The slumping process was relatively fast at first, but slower creeping of material would have continued to deform the surface over time. I'm not sure about the parallel features on the central mound. Perhaps the debris flows placed some stress on the edifice as they piled up. ----- This corkscrew-like feature here: [attachment=25376:Vesta_sausage.JPG] reminds me of the 'sausage factory' on Enceladus: [attachment=25377:Enceladus_sausage.jpg] It looks as if the surface here was stressed in one direction and then 'rolled' in another. |
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