Mount Sharp - Extended Mission 1 - Page 62

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LWS


Posts: xxx

Reply: 1221



PostPosted: March 3, 2016 11:14 AM 

testing

LWS


Posts: xxx

Reply: 1222



PostPosted: March 3, 2016 4:17 PM 

A quite peculiar debris flow from sol 1267.

Note the debris flow, lower midle right side of image. It appears to originate from under dark rocks at top of slope, travels over some veins and then UNDER the lower veins.

Hmmm!

Winston

LWS


Posts: xxx

Reply: 1223



PostPosted: March 3, 2016 4:19 PM 

Which came first? The lower veins or the flow?

Winston

LWS


Posts: xxx

Reply: 1224



PostPosted: March 3, 2016 4:52 PM 

Or.... How deep is the origin of the flow?

Winston

LWS


Posts: xxx

Reply: 1225



PostPosted: March 4, 2016 8:31 AM 

Another sol 1267 debris flow

Winston

AZ-Dave


Posts: xxx

Reply: 1226



PostPosted: March 4, 2016 6:47 PM 

BACk ONLINE!!!

LWS


Posts: xxx

Reply: 1227



PostPosted: March 5, 2016 8:25 AM 

Some sol 1257 microbialites

Winston

Kye Goodwin


Posts: 1166

Reply: 1228



PostPosted: March 5, 2016 1:57 PM 

LWS, re your 1222, I don't know how to interpret that slide that seems to pass under an area covered in the bright material. I've been looking at these slopes with extensive areas of bright stuff and wondering how they may have formed. The bright stuff (mostly calcium sulphate, I think Curi has determined) certainly appears to fill fissures in the rock in places, which means that it is present in shapes that, if fully revealed by erosion, are sheets of material cast in the narrow fissures. Here's three overlapping images of that slope:

There's a lot of the bright stuff on what must be an eroded surface, not an ancient surface. How can we explain this? The bright material might be present as a thick deposit, not in a thin fissure, and the modern slope just happens to cut through it. Or, the modern surface happens to presently parallel a deposit in an extensive tilted fissure. (This choice looks unlikely to me.) Or, pieces of bright fissure fill have eroded out of the rock and now lie loose on the slope surface. (This would help to explain how a slide could pass under a bright area.) Or, the bright material has covered the slope surface relatively recently, since the slope's creation by erosion. This would require that the bright stuff has been created in an environment something like current surface conditions.

I don't know what to make of it. In the last image, above center (about 5,7) there are blocks of loose rock and bedrock with clearly eroded layering that look almost as if they have been painted with the bright stuff. Hmm? I'm suspicious of the bright stuff. Its surely a very common, widespread and in-your-face feature of the "Murray Formation", but maybe the cause for the correlation is actually with the relatively recent Dark Moat instead.

AZ-Dave


Posts: xxx

Reply: 1229



PostPosted: March 7, 2016 2:28 PM 

Kye - I also noted the white "almost painted" looking stuff as well, it looks similar to the mineralization found in a lot of AZ dry creekbeds where water flows once and a while. But I dont think thats what it is...however, the dark flows in these images is suspect, and they appear to be coming from up and under veins and rocks, rather than loose dry flows.
There may be some type of percolation process where water/brines come to the surface from deeper under at times, leaving the salts and minerals behind?

As for the flows stopping and continuing past veins it makes a good argument for temporary liquid being present.

LWS


Posts: xxx

Reply: 1230



PostPosted: March 7, 2016 5:42 PM 

Sol 1273; 3D of Surface of a rock now being studied. auto White Balanced and one image scaled up.

AZ-Dave;

You said above: "As for the flows stopping and continuing past veins it makes a good argument for temporary liquid being present."

That's exactly what I was cautiously trying to hint to Kye as I know his aversion to anything that hints at current water on Mars.

Winston

LWS


Posts: xxx

Reply: 1231



PostPosted: March 7, 2016 5:51 PM 

AZ-Dave;

Almost forgot to mention that I think that "white" almost painted stuff is likely to be either veins or the residue some other mineralization. I also think your analogy to intermittently dry streambeds in Arizona is probably what is occurring at Gale crater right now on Mars. Its intermittent water flows that produces it. So when they find Gypsum and other salts seemingly painted over some surfaces, they are actually residues that have been building up in the present from current small diurnal flows of brines.

Winston

AZ-Dave


Posts: xxx

Reply: 1232



PostPosted: March 7, 2016 6:45 PM 

LWS - And if not full-on larger flows, then we are seeing the remnants of past more liquid-type flows. I found an image of another "dry" debris/sand flow on same SOL 1267:

But again, the interesting thing is where they are starting, out and from under ledges. This entire slope seems to be active. I wonder how far the rover driving sends vibrations, seems too far away to be from rover, but these crusts we see may be able to transmit the waves further, especially if they are on top of a different subsurface base material.

AZ-Dave


Posts: xxx

Reply: 1233



PostPosted: March 7, 2016 6:50 PM 

Also on this SOL 1267, I have found yet another Sphere object, half-way exposed/erupting from the sand, to the right of center. Also, above the sphere a few inches are 2 depressions which appear excavated, thy are not from Chem/Laser, very interesting:

We have seen these exact same spheres before, they are different in texture, color, and appearance from all surrounding sand. They are very suggestive of active fungal/bio. Ive been scouring images daily to find repeat spheres, and finally found one.

Its really interesting that particular image is the only-up close Right Mast Cam image in that series of images, exactly like the other sphere from december...they seem to really "luck" out with capturing special objects in one-off Right Mast cam images...or there are others.

It would be a great target for MAHLI and or Chem Cam.

LWS


Posts: xxx

Reply: 1234



PostPosted: March 7, 2016 11:15 PM 

AZ-Dave; re your sol 1267 image in your reply 1232 above. I've autoequalized it to more clearly show the flows.

They look quite old and unlikely to have been caused by Curi's movements.

Winston

AZ-Dave


Posts: xxx

Reply: 1235



PostPosted: March 8, 2016 12:53 PM 

Gonna throw out a potential theory for consideration, Ive seen these type of features in other areas before, and they are again showing up, over and over again:

Perhaps some of the wafers/thin layers of "rock" and such are either layers of frozen brine/sand, or the residue/remnants of multiple freeze-thaw cycles still occurring leaving behind these things. I dont think we are looking at simple erosion here, these appears to be ongoing processes, even if they form over thousands of year in episodes...

LWS


Posts: xxx

Reply: 1236



PostPosted: March 10, 2016 11:40 AM 

Here' a 3D treatment of yesterday's release of a series of MI images of veins intermingling with mudstone festoons looking like microbialites.

Winston

LWS


Posts: xxx

Reply: 1237



PostPosted: March 10, 2016 11:43 AM 

Oops!

Here's the X-eyed 3D image

Winston

AZ-Dave


Posts: xxx

Reply: 1238



PostPosted: March 10, 2016 12:58 PM 

I almost fell out of my seat when I looked at today image dump...talk about recurring patterns and sizes of nodules...Im calling this "Snail Patch Garden":

AZ-Dave


Posts: xxx

Reply: 1239



PostPosted: March 10, 2016 1:04 PM 

And a VERY channel on the far middle right-hand side of this image...it appears to have been formed fairly recently:

It appears Curi has stumbled upon a very interesting area! I wish we could get real, unaltered color of this area, they have been applying orange filters a lot again lately, it washes out contrast to a huge degree.

LWS


Posts: xxx

Reply: 1240



PostPosted: March 14, 2016 10:47 PM 

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