South Endeavour Crater - Page 14

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John Radogno


Posts: 37

Reply: 261



PostPosted: February 28, 2018 11:25 PM 

Barsoomer,
I think the whitish rocks above the dark rocks is a seperate hill, farther off behind the jumble of the darker rocks.

Barsoomer


Posts: 344

Reply: 262



PostPosted: February 28, 2018 11:35 PM 

This is the context. The image in the last post is quite a distance away and looks flat in the cross-eye. It looks more natural in parallel eye stereo. Bring up two copies of the image side-by-side to use parallel-eye. Overlap the images (say by half) to make it easier to fuse them for viewing.

A lot more sheets on that hill.

Significant jpg artifacts in all the images in this region (see the sky for example), not sure why.

Barsoomer


Posts: 344

Reply: 263



PostPosted: March 1, 2018 12:11 AM 

Here's a stereo anaglyph (to be viewed with red/green glasses). It seems to show the dark rocks bursting out of the whitish covering.

John Radogno


Posts: 37

Reply: 264



PostPosted: March 1, 2018 9:34 AM 

The anaglyp does show a better image! The distant hill on the left looks like white ceiling plates in top a broken up hillside that exposes the rock material underneath. The ridge on the right appears much closer but on that one it looks like the jumbled rocks are sitting on top of the whitish rock plates. Very interesting.

Barsoomer


Posts: 344

Reply: 265



PostPosted: March 1, 2018 11:05 PM 

False color (L257), but it is unusual for it to look so purple and green. The shadows are the same in the 3 color channels so the lighting cannot have changed that much. The rocks must be much brighter in the infrared (L2) and ultraviolet (L7) and much darker in the green (perhaps causing the green channel to be "balanced").

Some odd-looking rocks here. (I don't recall ever seeing rocks like that on Earth.)

Barsoomer


Posts: 344

Reply: 266



PostPosted: March 2, 2018 1:44 AM 

Snapshots:



Those are parallel eye. Some X-eye:


Barsoomer


Posts: 344

Reply: 267



PostPosted: March 5, 2018 1:56 AM 

Joe, I think Winston speaks for us all with his concern and best wishes. Hang in there..

The dark sand seems to emanating (in fact almost pouring) from the rock in this image.

Barsoomer


Posts: 344

Reply: 268



PostPosted: March 6, 2018 3:51 PM 

[link]

Monthly MER Report from The Planetary Society written by A.J.Rayl.

Includes a unique self-portrait of Oppy on Mars stitched together from multiple MI images. Well-worth seeing. This report celebrates 5000 Sols on Mars. Also describes the rover's progress down Perseverance Valley, likely carved by water or mud or ice, or some combination thereof.

The last few paragraphs of the worth discuss the intriguing pitted cavity-laden rocks.

Barsoomer


Posts: 344

Reply: 269



PostPosted: March 7, 2018 9:55 PM 

New Microscopic Images from the MI instrument.

The pebbles seem to have attached micro-berries or bumps.

Looks to me like scrape marks. Might support ice or debris flows.

Possible micro-veins.

LWS


Posts: xxx

Reply: 270



PostPosted: March 8, 2018 5:36 PM 

Barsoomer;

Here is an image from sol 4999 of some weird rocks. They are quite reminiscent of some rocks Oppy imaged at the edge of a fresh crater.

I'll look for it and post later.


Winston

LWS


Posts: xxx

Reply: 271



PostPosted: March 8, 2018 5:42 PM 

Here's the Fram crater image

Winston

Joe Smith


Posts: xxx

Reply: 272



PostPosted: March 8, 2018 6:55 PM 

pitted and crumbly,,, the crumbly, maybe not.

Barsoomer


Posts: 344

Reply: 273



PostPosted: March 8, 2018 11:14 PM 

Hi Joe, hope you are doing better.

Winston, thanks for the reply 270 image. Yes, those rocks are intriguing. The TPS report suggested they might be volcanic, but that remains to be tested (presumably with the APXS).

Guys, I really need your help with this one:

My vision is not so good these days, but I seem to see a fine web-like pattern covering this rock. Here is a parallel-eye view of the same feature:

My question: is this due to:

1. My poor vision.
2. A jpeg artifact. (But the same pattern detail appears in the right-eye image, though not as clearly.)
3. An artifact of my monitor. (But again the detail should differ between the two eyes.)

Please help me out here. Am I seeing things? Here is a link to a png version (lossless format) of the same image.

LWS


Posts: xxx

Reply: 274



PostPosted: March 9, 2018 8:57 AM 

Barsoomer;

My vision is getting worse by the way also but fwiw I can see fine vein like structures partially covering the rock. Most of them seem to be curved, rather than straight. At another level there seems to be pattern of very small spheres but that might be artifact rather than real.

Hope this helps!

Winston

Barsoomer


Posts: 344

Reply: 275



PostPosted: March 9, 2018 7:50 PM 

With my older monitor at work, I wasn't able to see the pattern either until I applied a sharpen enhancement. At home, I use a new 4K TV as my monitor.

I think the pattern is more visible in the above enhanced and enlarged version. I don't think it is an artifact of the enhancement because I can see it without enhancement in a newer monitor at work.

I think though it is mostly an optical effect resulting from many rows of small pebbles rather than an actual web structure.

Barsoomer


Posts: 344

Reply: 276



PostPosted: March 9, 2018 10:42 PM 

It appears my TV was applying a sharpening process without my knowing it. So the patterns may in fact be largely artifacts. Beware of using a TV as a monitor!

Barsoomer


Posts: 344

Reply: 277



PostPosted: March 10, 2018 1:02 PM 

Many of the rocks in this area seem to have formed from thin membranes stretched over gravel.

In some cases the pebbles that were under the membranes seem to be visible as impressions or "bumps" on the tops of the rocks, suggesting the membranes were flexible before they hardened.

Some of the rocks are curved in places. Hmm...

LWS


Posts: xxx

Reply: 278



PostPosted: March 10, 2018 5:35 PM 

Barsoomer;

Look at this rock from sol 5021. Its yellow and on the left side of the image. It perhaps show an earlier stage of what you described above.

Winston

LWS


Posts: xxx

Reply: 279



PostPosted: March 10, 2018 5:38 PM 

Look at the yellow rock on the left side of the image. Seems to be an early example of your description above

Winston

Barsoomer


Posts: 344

Reply: 280



PostPosted: March 10, 2018 8:02 PM 

Hi Winston. I think that might perhaps be a later stage in the process where the formation has started to erode and crumble away.

I think the whitish rocks here may be examples.

I have also seen greenish rocks in this category. In addition, some eroded rocks in this area (of various colors) seem to have thin platy surfaces with insides consisting of loose gravel and soil.

The above image is a composite made with Red/Green/Blue filters (L456). So I think the green really is green, which makes me wonder if the green surface involves photosynthetic organisms. The image also has rocks near the top with holes that seem associated with the fine dark soil that it is tempting to speculate may be a byproduct of lithotrophic bacteria.

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