South Endeavour Crater - Page 18

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Author Message
Barsoomer


Posts: 344

Reply: 341



PostPosted: April 12, 2018 10:15 PM 

Thanks Winston and John. Here is a crude overlap of the new MIs. (Winston, grateful if you could do a proper stitching job.)


Barsoomer


Posts: 344

Reply: 342



PostPosted: April 13, 2018 2:30 AM 

Winston, here's an X-eye 3d for your feature in reply 339.

LWS


Posts: xxx

Reply: 343



PostPosted: April 13, 2018 3:30 PM 

Barsoomer;

Here's one version of the stitched images. I've reduced the contrast in the images.

I'll work on another soon.

Winston

LWS


Posts: xxx

Reply: 344



PostPosted: April 13, 2018 4:08 PM 

Here's a clearer image of the locules and their contents.

Winston

John Radogno


Posts: xxx

Reply: 345



PostPosted: April 13, 2018 5:26 PM 

Baroomer, Beautiful X-eye. Yes, something is/was going on there. The rover report was suggesting outgassing of different minerals but, I don't know...

Barsoomer


Posts: 344

Reply: 346



PostPosted: April 14, 2018 12:33 AM 

Thanks, Winston, for the stitched images. The extra-clear image in reply 344 may show the rock is scraped, if I am not mistaken.

John, thanks. If the Mars 2020 mission gets redirected to Perseverance Valley, we will know something is up!

Barsoomer


Posts: 344

Reply: 347



PostPosted: April 14, 2018 10:17 PM 

There seem to be several substances and processes at play in this area. Some of the rocks have many cavities and may be volcanic.

There are other rocks that seem to be of many different types and colors (at least in false-color).

Of particular note are thin flat often curved and wrinkled blue-black rocks. Many of the rocks have been covered by a creamy whitish coating.

In some cases, the creamy coating appears to have spilled off the rock onto the surrounding soil, which suggests it may have been fluid at one time. It seems to turn yellow (in L257 color) after it dries or hardens.

The creamy coating appears to be highly corrosive to some of the rocks (see first image), but not others. In some cases, a green "overcoat" may occur over a creamy surface (see first colored image).

Some hypotheses. The creamy corrosion could be biological but it could also be chemical, perhaps relating to acid fog of some kind. The fine dark sand: One possibility is that it is gradually passing downhill and piles up against the rocks with cavities and infiltrates them (essentially traveling through those rocks).

Certainly there is a lot happening here and I look forward to hearing what explanations the MER team come up with.

Barsoomer


Posts: 344

Reply: 348



PostPosted: April 16, 2018 12:47 AM 

The whitish coating seems very prevalent around here. Remember Winnemucca?

I wonder if this is a massive reservoir of the white material, perhaps the source of the "infection" here in Perseverance Valley.

Actually, we have seen something like this whitish material before.

The above image is from March 28, 2013. Note the pebbles (top) that seem to have been fused together.

Although we should consider other possibilities, I tend to personally favor the biological explanation as being the most likely in my view.

Barsoomer


Posts: 344

Reply: 349



PostPosted: April 16, 2018 8:48 PM 

Pancam of the MI'ed rock. Compare to Winston's 343.

LWS


Posts: xxx

Reply: 350



PostPosted: April 17, 2018 8:49 PM 

Barsoomer, re your reply 349

Truly beautiful L257 composite image!

Tracked down the MI which is located in the reddish spot on the Left Pancam composite.

I also think that a biological explanation (current or former) seems to be the best one for this series of holey rocks.

Will try to do a colouration of the best MI using a L257 composite when I am less busy.

Winston

LWS


Posts: xxx

Reply: 351



PostPosted: April 18, 2018 2:29 PM 

Here's my colouration of a sol 5057 MI using colours from a sol 5053 L257 pancam composite.

The innards are a bit clearer. Looks like Oppy did some scraping around there and exposed some interesting holes in the rock after the surface was removed. The varied colours of the surfaces and the exposed inside of the rock may even be the most important aspect of the image.

Winston

LWS


Posts: xxx

Reply: 352



PostPosted: April 18, 2018 2:44 PM 

Here's the sol 5057 context image and source of the colours that I used to colour the MI.

Winston

Barsoomer


Posts: 344

Reply: 353



PostPosted: April 19, 2018 1:09 AM 

Winston, Wow! Bravo! That is a magnificent piece of colorizing work.

It's nice to see the rock has a heart. Wink Not sure what it means. It almost looks organic.

LWS


Posts: xxx

Reply: 354



PostPosted: April 19, 2018 7:33 AM 

Barsoomer;

Thanks! I think it's my best.

Winston

John Radogno


Posts: xxx

Reply: 355



PostPosted: April 19, 2018 4:32 PM 

Hopefully they will hit it with some laser shots. That relish color is really interesting.

Barsoomer


Posts: 344

Reply: 356



PostPosted: April 21, 2018 2:35 AM 

The orange color (L456) is similar to the grains in the sundial rim. I think Oppy drove through here.

Oppy definitely drove through here. Hulk smash!

Closeup. We're not in Kansas any more!

Joe Smith


Posts: xxx

Reply: 357



PostPosted: April 22, 2018 10:15 PM 

ah ha..... and then we begin? to see the first boxlike structure??

Barsoomer


Posts: 344

Reply: 358



PostPosted: April 24, 2018 12:16 AM 

What do you all make of this?

This was likely a marine environment at one time...

Barsoomer


Posts: 344

Reply: 359



PostPosted: April 24, 2018 12:29 AM 

Hint:


LWS


Posts: xxx

Reply: 360



PostPosted: April 24, 2018 11:07 PM 

I agree with your suggestion re. a long past marine environment. Re, the eels, I don't think so. I think the rocks in tis area are more reminiscent of stromatolites.

Google rottnest stromatolites or hamelin stromatolites (lots of similar holey rocks there). It is somewhat interesting that one of the Curi sites with stromatolite like rocks was named Rocknest.

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