Mount Sharp Extended mission 1a - Page 16

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John Radogno


Posts: xxx

Reply: 301



PostPosted: January 4, 2018 12:15 AM 

Paul,
I know I have seen these forms before, maybe a year ago. But now they appear to come in two different ways. In the images posted in #301, they look like they are attached to the base rock. In the chem-cam of a nearby feature, they look as if they are completely un-attached as if they are loosely lying on top the rocks, which is how I remember seeing them in the past:

The loose ones are very smooth, possibly metallic?

Barsoomer


Posts: 344

Reply: 302



PostPosted: January 4, 2018 12:47 AM 

Looks like Paul's 301 somehow got overwritten by John's 301.

John Radogno


Posts: xxx

Reply: 303



PostPosted: January 4, 2018 2:02 AM 

This is weird!

Paul Scott Anderson


Posts: 53

Reply: 304



PostPosted: January 4, 2018 2:18 AM 

I just saw that too!

LWS


Posts: xxx

Reply: 305



PostPosted: January 4, 2018 3:37 PM 

Here's a 3D of the sol 1923 images

The loose objects now appear to be the attached tops of broken and then smoothly eroded walls of a different material to the base rock.

Winston

John Radogno


Posts: xxx

Reply: 306



PostPosted: January 4, 2018 6:21 PM 

It looks like Curiosity broke off a piece in the lower right #305 and the piece moved toward the center. Compare #301 with #305.

Paul Scott Anderson


Posts: 53

Reply: 307



PostPosted: January 4, 2018 8:16 PM 

Another closer image of some of the odd rod-like formations (sol 1923). I was also curious about the lighter-coloured "line of little blotches" to the right of the largest object. Scuff from a wheel or the APXS?

John Radogno


Posts: xxx

Reply: 308



PostPosted: January 4, 2018 8:36 PM 

That could be how the piece broke off, but the broken piece moved to the left. This is worth taking a closer look.

Paul Scott Anderson


Posts: 53

Reply: 309



PostPosted: January 5, 2018 2:22 AM 

Hmm...

http://www.leonarddavid.com/curiosity-mars-rover-investigates-eye-catching-odd-features

John Radogno


Posts: xxx

Reply: 310



PostPosted: January 5, 2018 11:00 AM 

Nice link Paul! Here is the Earth comparison for trace fossils:

The key issue is that crystals in rock that are dissolved away may leave crystal molds. So it may be something else. But I think this is great that they brought Curiosity back to these rocks specifically research the possibility of having found fossils.

Paul Scott Anderson


Posts: 53

Reply: 311



PostPosted: January 5, 2018 2:06 PM 

John: that's true. May well turn out to be more crystal molds or something similar. We need the analysis data, soon-ish I hope.

I also just saw this tweet from Pascal Lee, planetary scientist at NASA Ames. "Reminiscent of bioturbation."

https://twitter.com/pascalleetweets/status/949071961904201728

John Radogno


Posts: xxx

Reply: 312



PostPosted: January 5, 2018 4:11 PM 

Interesting, to be honest, I had to look up the word "bioturbation." It is a good word!

Joe Smith


Posts: xxx

Reply: 313



PostPosted: January 6, 2018 8:40 AM 

so then these are growths?,(mineral?),,,, and correct to say they are not mobile?

Winston?,,,,,, anyone or all???
joesmith

Paul Scott Anderson


Posts: 53

Reply: 314



PostPosted: January 9, 2018 2:34 AM 

Apart from the "sticks," I noticed, as have others, an interesting feature just to the right of the "broken stick" - what looks like a long, repeating, lighter coloured pattern on the rock. I've seen guesses that it might be from the grousers on a wheel of the rover or from the APXS, but nothing specifically mentioned in any posted articles, etc. To my eye, zoomed in, it looks like it follows the contours of the rock. I would also guess maybe caused by the rover, since the soil around the rock looks disturbed, but does anyone know for sure? I posted cropped image on my blog:

https://i1.wp.com/planetaria.ca/wp-content/uploads/2018/01/tube.png

John Radogno


Posts: 37

Reply: 315



PostPosted: January 9, 2018 12:10 PM 

I am pretty sure that interesting feature are laser shots. I think they aimed for the sticks and missed. I am interested in the broken stick just to the left of the laser shots. Does the broken end reveal a hollow core? The piece that broke off from this is further to the left and up a bit, which may indicate what direction the series of shots were made.

Paul Scott Anderson


Posts: 53

Reply: 316



PostPosted: January 9, 2018 2:44 PM 

John: that had been my first thought, but then I saw others saying maybe from the wheels or APXS. I just saw another image of some laser shots from sol 1821 and the (oblique in this case) shapes of the individual spots look quite similar to the other ones. I think this is the answer. I wonder too if the laser itself could have broken the end off that stick? And it does look hollow.

https://mars.nasa.gov/msl/multimedia/raw/?rawid=1821MH0001220010701544C00_DXXX&s=1821

John Radogno


Posts: xxx

Reply: 317



PostPosted: January 9, 2018 11:15 PM 

If the stick really is hollow, it may be something more complex. I am thinking of how the decayed bodies buried in the volcanic ash of Pompeii, left hollowed out forms of the said bodies. Perhaps these sticks had softer material inside at one time.

Faceless


Posts: 24

Reply: 318



PostPosted: January 10, 2018 4:46 AM 

Another symmetrical fossil imaged on Sol 1928:
https://mars.nasa.gov/msl/multimedia/raw/?rawid=CR0_568652895PRC_F0671846CCAM05927L1&s=1928

Faceless


Posts: 24

Reply: 319



PostPosted: January 10, 2018 8:46 AM 

Mars "sticks" are remains of blood vessels:
[link]

Faceless


Posts: 24

Reply: 320



PostPosted: January 10, 2018 11:02 AM 

Sorry, re reply 319, blood vessel remains are only portions of the Mars "sticks".

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