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The Top of Vera Rubin Ridge, Site 66-, sol 1812-, 11 Sep 2017-
PaulH51
post Jan 11 2018, 10:37 PM
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QUOTE (Gerald @ Jan 11 2018, 10:01 PM) *
The preliminary name of this valley seems to be ]Phyllosilicate Trough (PT)

Many thanks Gerald, very useful. Here we have a clearer view of it in a simple mosaic of 16 L-MastCam frames from sol 1930 (raw colours, no processing other than stitching in MS ICE)
Attached Image


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PaulH51
post Jan 12 2018, 02:39 AM
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QUOTE (Sean @ Jan 12 2018, 12:28 AM) *
There is a nice view of the area ahead about 1 minute into this video when we clear the ridge...

Sean: do you have any plans to up this on YouTube? smile.gif


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Sean
post Jan 12 2018, 07:18 AM
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Already there Paul! smile.gif

Hematite & Clay


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PaulH51
post Jan 12 2018, 08:50 AM
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QUOTE (Sean @ Jan 12 2018, 03:18 PM) *
Already there Paul! smile.gif

Sorted, thanks Sean smile.gif


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Ant103
post Jan 12 2018, 12:01 PM
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Sol 1930 Mastcam34 mosaic of the valley :


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PaulH51
post Jan 13 2018, 01:45 PM
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I'd have to call this another ring of fine sand left behind by the APXS shield after an integration, others in conspiracy land may call it a little differently smile.gif
Attached Image

Sol1933 MAHLI


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charborob
post Jan 13 2018, 07:28 PM
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I wonder if there is a problem with Midnight Planets. It is not showing the latest raw images, which are already posted on https://mars.nasa.gov/msl/multimedia/raw/.
Same with the Opportunity raw images.
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PaulH51
post Jan 14 2018, 04:04 AM
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QUOTE (charborob @ Jan 14 2018, 03:28 AM) *
I wonder if there is a problem with Midnight Planets. It is not showing the latest raw images, which are already posted on https://mars.nasa.gov/msl/multimedia/raw/.
Same with the Opportunity raw images.

I've sent an e-mail to Mike on January 03 re midnight planets not updating with the new image as regular as it used to, and his midnight loader Twitter posts have also stopped working in December. He's not replied yet, I'm not sure if he got the mail as it was addressed to the midnightplanets@me.com address I have used before. Probably just needs a reboot smile.gif


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fredk
post Jan 14 2018, 05:44 AM
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QUOTE (PaulH51 @ Jan 13 2018, 02:45 PM) *
I'd have to call this another ring of fine sand left behind by the APXS shield after an integration

The sun's from the right so the circular feature looks like a groove rather than a ridge. Probably scratches from the brushing:
http://mars.jpl.nasa.gov/msl-raw-images/ms...512C00_DXXX.jpg
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MrNatural
post Jan 14 2018, 12:31 PM
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QUOTE (fredk @ Jan 14 2018, 05:44 AM) *
The sun's from the right so the circular feature looks like a groove rather than a ridge. Probably scratches from the brushing:
http://mars.jpl.nasa.gov/msl-raw-images/ms...512C00_DXXX.jpg


Would anyone care to speculate about what we are looking at? The softness of the rock and the color certainly suggest phyllosilicates / clays, but I would expect hematite on Vera Rubin Ridge.

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serpens
post Jan 14 2018, 03:12 PM
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Not sure but this looks more like a ridge than a groove. There are similar marks adjacent.
Attached thumbnail(s)
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Phil Stooke
post Yesterday, 10:54 PM
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"... this looks more like a ridge than a groove"

It looks like a ridge if you think the light is coming from one direction, and a groove if you think the light is coming from the opposite direction. You must take the lighting direction into account. If you look carefully at the full image posted by Paul you can see shadows cast by individual grains. There is no ambiguity about the direction of lighting, so there is no ambiguity about what we are looking at. It's a groove. I agree with fredk that it was a product of the brushing, created by a clump of protruding DRT bristles slightly off-centre from the spin axis.

Phil



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nogal
post Yesterday, 11:46 PM
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Phil thank you for the tip about the grains' shadows. Still my brain wouldn't see a grove. Then I flipped the image vertically... et voilá!
Fernando
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PaulH51
post Today, 04:49 AM
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Many thanks for the clarification re the grain shadows, I need a better monitor and younger eyes smile.gif


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marsbug
post Today, 06:30 AM
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If it's any comfort: In close-up my brain insists it's a ridge too.
And my eyes are only mmph-ty four.


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