South Endeavour Crater - Page 17

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Author Message
Joe Smith


Posts: xxx

Reply: 321



PostPosted: April 3, 2018 7:44 PM 

LWS, Barsoomer, John(?),,,,,what color is the sand in these photos? how much have we guessed about soil
structure, ie", we already know it wont grow potatoes but what's it like ,,,roughly??

Thanks guys seems like I've known you guys for years,,, actually I Have!, (kinda)
Thanks as always for the attention given here!!
Joe

Joe Smith


Posts: xxx

Reply: 322



PostPosted: April 3, 2018 9:40 PM 

First Google reference found for above question

http://www.abc.net.au/news/2017-07-07/mars-toxic-soil-could-make-growing-vegies-harder/8687626

Joe Smith


Posts: xxx

Reply: 323



PostPosted: April 3, 2018 9:41 PM 

mmmm just answered my own question..

Barsoomer


Posts: 344

Reply: 324



PostPosted: April 3, 2018 9:50 PM 

Nice images, Winston. I didn't think of coral but that would explain the holes and compartments.

Joe, the lighting on Mars is different from Earth's but I think under Earth lighting, the sand would not look so different from that on Earth. Of course there are all kinds of colored sand, in Hawaii for instance, and on Mars there are differences with the dark sand and lighter varieties.

New MIs:

link
http://qt.exploratorium.edu/mars/opportunity/micro_imager/2018-04-03/

I don't know if they are of the holey rocks, but looking at them I would have thought they showed early morning frost. However, I checked one and it was taken around 3pm. So either afternoon frost or the Blob!

Barsoomer


Posts: 344

Reply: 325



PostPosted: April 3, 2018 9:54 PM 

Holey rocks it is...

Barsoomer


Posts: 344

Reply: 326



PostPosted: April 3, 2018 10:30 PM 

There seems to be some kind of shiny membranous covering on the rock.

Does Martian dust behave like this?

Barsoomer


Posts: 344

Reply: 327



PostPosted: April 4, 2018 1:07 AM 

On closer examination, it looks crystalline. It could be salt (or a salt). Salt-encrusted rocks would indicate a marine environment at some time in the past.

LWS


Posts: xxx

Reply: 328



PostPosted: April 4, 2018 8:47 AM 

Joe Smith, re. your reply 321.

From the vantage point of someone who has taken some agricultural soil chemistry and biology courses several years ago but whose memory seems to be gradually fading, the microscopic imager pictures of the martian soils do not appear, in general, to match earth soils in a number of important features, eg. many of them seem to be loose aggregations of fine sands and sometimes clay particles only rather than the ubiquitous earth equivalent of a mixture of sands, smaller particles and humic elements related to the incorporation of copious amounts of the products of microbial and other breakdown of vegetable matter. However there have been a few images, some of which I've captured in posts here or in my ebooks, which look almost exactly like earth soil. Most of these examples are from under broken rocks or from disturbed surfaces rather than directly from exposed surfaces.

Winston

Barsoomer


Posts: 344

Reply: 329



PostPosted: April 5, 2018 2:28 AM 

Oops! I think I got the left and right eyes reversed in my 326. Meanwhile, here is a proper cross-eye pic. The holey rocks do in fact have holes in the MIs, and the insides seem to be filled with the dark sand.

Apologies for my "senior moment"!

Barsoomer


Posts: 344

Reply: 330



PostPosted: April 5, 2018 8:47 PM 

Here is the corrected X-eye with the left/right reversed. You may need to shift-reload so your browser doesn't use the previous cached version of the webpage (or clear the Cache). Unfortunately in Safari you need to shift-reload each time until the cache is cleared.

I also corrected at the link in reply 326.

Barsoomer


Posts: 344

Reply: 331



PostPosted: April 5, 2018 9:06 PM 

A more detailed image. There are lots of holes.

Barsoomer


Posts: 344

Reply: 332



PostPosted: April 6, 2018 12:55 AM 

It's hard to avoid the thought that this shows the white stuff eating the rocks.

Darwin


Posts: xxx

Reply: 333



PostPosted: April 6, 2018 1:28 PM 

Hort gave me vuson .

Barsoomer


Posts: 344

Reply: 334



PostPosted: April 7, 2018 7:54 PM 


Some areas that look orange in the L257 (top) are more greenish in the L456 (bottom). A possible indication of chlorophyll.

Barsoomer


Posts: 344

Reply: 335



PostPosted: April 9, 2018 2:47 AM 

Creamy goo on wrinkled bluish sheet rocks.

Barsoomer


Posts: 344

Reply: 336



PostPosted: April 11, 2018 2:06 AM 

Winston, your 320. The circular holes with a circular middle do resemble holes here:

What about this one? It looks like something from Alice in Wonderland!

Some of the strange rock shapes remind me of Santa Maria... I wish Horton were here to give us his take on all this.

Barsoomer


Posts: 344

Reply: 337



PostPosted: April 11, 2018 9:05 PM 

A.J.Rayl's eagerly awaited monthly MER Update from the Planetary Society is finally out:

[link]

Reading between the lines, I get the impression that what has been seen does not fit neatly into conventional explanations. The article asks the question: "On Earth, the scientists found multiple colors for these rocks from the Pancam multispectral images...why?" and says a special additional update will be forthcoming.

One might also ask why do the putative volcanic vesicles contain fine dark sand, much of which seems to have fallen onto the ground nearby? (A nod to Kye here.) Why do the often bent whitish "pancake" rocks look as though they may have been soft and flexible when they originally formed? Why do the closest (albeit somewhat blurry) MI images of the ratholes seem to show tiny spheres embedded in the rock:


LWS


Posts: xxx

Reply: 338



PostPosted: April 12, 2018 1:56 PM 

Yes Barsoomer....... and why do the sol 5053 MI's have so many small features reminiscent of Life. This area might be unique amongst all the areas visited by Oppy so far.

Winston

LWS


Posts: xxx

Reply: 339



PostPosted: April 12, 2018 2:16 PM 

Here are some of the spore-like objects ejecting from locules, bounded by veins, in a sliced rock.

[link]

Winston

John Radogno


Posts: xxx

Reply: 340



PostPosted: April 12, 2018 4:12 PM 

Barsoomer, thanks for the link. It is interesting that the report did not mention the strange geometrics shapes and polygons found in the RAThole, but they did mention finding some unusual chemistry after the second dig. Wonder when we will get a repot on that.

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