Journey to Mt Sharp - Part 4: Beyond the Kimberley, Sol 634 [May 19, '14] to 706 [Jul 31, '14] |
Journey to Mt Sharp - Part 4: Beyond the Kimberley, Sol 634 [May 19, '14] to 706 [Jul 31, '14] |
May 19 2014, 07:00 PM
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#1
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I'd say that the sol 634 drive put the Kimberley in the rear-view mirror, so it's time for a new thread! Let's see how fast they can move toward Murray Buttes now!
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May 28 2014, 11:02 PM
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#2
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Senior Member Group: Members Posts: 1044 Joined: 17-February 09 Member No.: 4605 |
I feel that it would be a mistake to use the "Block Island Trio" for want of a better description as a template. The weathering of these examples at Gale seems more akin to Heat Shield Rock. The remnant coating on the Meridiani Trio could simply indicate that the abrasive scouring was reduced dramatically to an extremely gentle caressing before the process of removing the coating was completed. I think we can be certain that the Meridiani examples were subject to a very acidic environment although if the impact occurred early enough they could have encountered higher pH, basalt buffered groundwater. For Gale however it seems that the environment at this level was consistently pretty much neutral and could well have been reducing. As far as time lines go we do not really have a clue whether the Gale examples impacted early on as the sediment in the crater was building up in a saturated environment or later during the dry, deflationary period. All is conjecture anyway as these rocks diminish in the rear view mirror.
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