MECA (microscope) Images |
MECA (microscope) Images |
May 30 2008, 08:19 AM
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
Doug I know this isn't exactly a "sub-element activity", but it's certainly a small image.
Can someone tell us anything about this MECA plaque. They don't seem to have captured the entire thing in their shots and it would be nice to fill in some of the blanks. I've inserted some assumptions in the attached merged image. Just love these sort of personal touches which have stories linked to them. My name is on the mini-DVD...who else on UMSF signed up? Astro0 |
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Jun 6 2008, 08:09 PM
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#2
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Member Group: Members Posts: 242 Joined: 17-February 04 From: Ohio, USA Member No.: 34 |
Wow. These are very interesting images of possible martian sedimentary particles. It's really hard to say too much about "grains mounts" such as this. You can look at the grain shape, it's opacity, and it's color - but it's hard to make any comprehensive analyses based on only that information.
A grain that is interesting to me is the pinkish, rectangularly shaped one that is "southeast" of the middle grain noted in the microscopic image. Halite frequently shows up as rectangular grains and can be stained pinkish by hematite - but then, other minerals can be pinkish and rectangular too. (shrug) |
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Jun 6 2008, 10:27 PM
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#3
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Newbie Group: Members Posts: 1 Joined: 1-June 08 From: Kiwi living in Boston Member No.: 4171 |
You can look at the grain shape, it's opacity, and it's color - but it's hard to make any comprehensive analyses based on only that information. My first guess was salt or silica, but I'm no geologist, and Emily Lakdawalla has posted a more informed opinion on this: http://www.planetary.org/blog/article/00001497/ Re. requiring a volcanic origin for silica: I'm guessing a grain of that size could be lofted and carried to a polar position, given a few billion years... - CH |
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