The Top of Vera Rubin Ridge Part 1, Site 66-67, sol 1812-1943, 11 Sep 2017-23 Jan 2018 |
The Top of Vera Rubin Ridge Part 1, Site 66-67, sol 1812-1943, 11 Sep 2017-23 Jan 2018 |
Sep 11 2017, 09:50 AM
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#1
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Senior Member Group: Members Posts: 2431 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
Welcome to Route 66... Er, make that Site 66
Drive 0000 on Sol 1812. Roughly stitched L-NavCam using MS ICE Midnight Planets reporting it as ~5.6m ESE (115º) link |
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Sep 14 2017, 11:39 AM
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#2
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Member Group: Members Posts: 933 Joined: 4-September 06 From: Boston Member No.: 1102 |
The really fine laminations indicate suspension fallout in reasonably deep still water, so the crater was experiencing a wet environment when this level was laid down. Given the original permeability of the deposits my horribly unreliable intuition suspects that the hematite developed during a dry cycle via a mixing interface between groundwater and water infiltrating from a disconnected stream, fed by acidic meltwater at the beginning of the volcanic period that gave rise to the sulphate formation. Development in an open rather than closed environment. I assume the spot was cleared of dust by laser blasts, not by brushing? If so I don't think I have ever seen this type of cleaning. Might the shiny surface be hematite? Not berries, but sheets??? -------------------- |
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Sep 14 2017, 09:30 PM
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#3
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Senior Member Group: Members Posts: 2431 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
I assume the spot was cleared of dust by laser blasts, not by brushing? If so I don't think I have ever seen this type of cleaning. Might the shiny surface be hematite? Not berries, but sheets??? It appears to be LIBS of an AEGIS target. Here is the before and after LIBS. The eroded surface seems to have small 'facets' for want of a better description. Certainly an interesting site... |
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