YellowKnife Bay - Page 6

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Paul Scott Anderson


Posts: 53

Reply: 101



PostPosted: January 15, 2013 8:30 PM 

Here's a closeup MAHLI image of some similar mottled material (sol 15 Cool :

From today's press briefing, these are composed of hydrated calcium sulfate, requiring water to form. So not anything like lichen, oh well, but still interesting. The one from sol 135 has been named Capitan and was analyzed by ChemCam:

http://mars.jpl.nasa.gov/msl/news/whatsnew/index.cfm?FuseAction=ShowNews&NewsID=1410

Paul Scott Anderson


Posts: 53

Reply: 102



PostPosted: January 15, 2013 8:34 PM 

That was supposed to say sol 158 in previous post...

marsman


Posts: 303

Reply: 103



PostPosted: January 15, 2013 10:07 PM 

A picture of Lepidocrocite:

And here is a link to a nice little abstract on the Biomineralization of Lepidocrocite and Geothite.

http://www.sciencedirect.com/science/article/pii/S0016703710001778

Here is a picture of gas bubbles in sediment:

http://geology.about.com/od/geoprocesses/ig/sedstrucs/gasescape.htm

/R

marsman

marsman


Posts: 303

Reply: 104



PostPosted: January 15, 2013 10:09 PM 

test post.

hortonheardawho


Posts: xxx

Reply: 105



PostPosted: January 17, 2013 9:16 AM 

Sol 0158 extended dynamic range enhanced difference false color MAHLI closeup in rock crack in Yellowknife Bay:

Notice the "white stuff" hiding in the shadows of the crack.

Speaking of calcium sulfate ( Gypsum ) ...

The habitability of vesicles in martian basalt

and

FOSSILIZED MICROORGANISMS PRESERVED AS FLUIDINCLUSIONS IN EPITHERMAL VEINS

and

Gypsum-permineralized microfossils and their relevance to the search for life on Mars.

This would be a great place to fire up the MAHLI LED lights at night.

kevin


Posts: xxx

Reply: 106



PostPosted: January 18, 2013 11:47 AM 

Amazing MAHLI image!

Randy in Yellowstone


Posts: 35

Reply: 107



PostPosted: January 18, 2013 3:19 PM 

Wow what the heck ARE all those cone-shaped things???

John


Posts: xxx

Reply: 108



PostPosted: January 18, 2013 5:00 PM 

I'd like to know how they get that much depth of field from that camera.

Wildcat


Posts: xxx

Reply: 109



PostPosted: January 18, 2013 10:22 PM 

The dusty-looking fuzz on the rocks in the picture below remind me of the algal fuzz on rocks at the pond behind my house:

Wildcat


Posts: xxx

Reply: 110



PostPosted: January 19, 2013 8:08 PM 

Original picture:

Now, note the symmetry and compare:

Specifically, note how the area under the dotted red line looks like it should be identical to the area under the solid red line to the left but would seem to have been broken off..

Wildcat


Posts: xxx

Reply: 111



PostPosted: January 19, 2013 8:51 PM 

Interesting trail left by this whitish flake:

hortonheardawho


Posts: 3465

Reply: 112



PostPosted: January 20, 2013 8:59 PM 

Curiosity sol 0160 enhanced difference false color 3D of broken rock in Yellowknife Bay:

Lots of interesting dark inclusions in the white rock crust .

hortonheardawho


Posts: 3465

Reply: 113



PostPosted: January 21, 2013 1:48 PM 

sol 0162 enhanced difference false color MAHLI 3D of white patches on small rock chip in Yellowknife Bay:

with location links back to a curious lighter patch on a nearby rock.

hortonheardawho


Posts: 3465

Reply: 114



PostPosted: January 21, 2013 5:42 PM 

Curiosity sol 0160 Mastcam / Chemcam 3D of peculiar white surface on a rock in Yellowknife Bay:

There should be some interesting chemical data for the white area. I wonder when we will ever see the results?

J. Chris Campbell


Posts: xxx

Reply: 115



PostPosted: January 21, 2013 7:12 PM 

http://mars.jpl.nasa.gov/msl/multimedia/raw/?rawid=0162MH0193000015S0_DXXX&s=162

Can someone please tell me what this picture is telling us? Is this a infrared picture? If so, It is highly interesting that the piece of what seems to be the same rock is so mujch warmer than the rock right next to it.
Here is the picture of just the rock: http://mars.jpl.nasa.gov/msl/multimedia/raw/?rawid=0162MH0193000014R0_DXXX&s=162

So why would a seemingly same rock be that much warmer. Please enlighten me.

hortonheardawho


Posts: 3465

Reply: 116



PostPosted: January 21, 2013 9:23 PM 

Er, the first image is a "height" image created along with the second image - an EDF ( Extended Depth of Field )image both of which were created from "focus stacking" eight different focus MAHLI images.

Mazebo


Posts: xxx

Reply: 117



PostPosted: January 22, 2013 4:07 PM 

Re: #111

At last, here's a good "calibrating" pic:

It's got both a clean white (broken up rock, lower right) and this golden/reddish, highly reflective material (e. g. at the top) that seems to be spread sporadically over the whole of YellowKnife Bay.
Such as this:

On the other hand Nasa upholds that this:

is "calcium rich":

[link]

Hmm...

Wildcat


Posts: xxx

Reply: 118



PostPosted: January 22, 2013 7:40 PM 

Not a rock:

Notice the bilateral symmetry? Notice how right smack dab in the middle there is a o-shaped object? Note how below it, something extends toward the soil.

Again, note the symmetry in this one:

This pattern which looks like 2 V's, one right side up and the other upside down that typically meet at the vertex of the right side up V, are all over the ground in Yellowknife (or x-shaped when together). Oppy has also taken pictures of this same pattern. This shape closely resembles Curiosity's black and white calibration/acuity badge. Interesting coincidence.

We sure are taking a lot of pictures of these things, too. See, Hort's No. 51 post on this thread.

Wildcat


Posts: xxx

Reply: 119



PostPosted: January 22, 2013 8:09 PM 

Look at the obvious similarity:

The source picture is this one from Sol 164:

The overlay example is this one, also from Sol 164:

Wildcat


Posts: xxx

Reply: 120



PostPosted: January 23, 2013 2:28 AM 

And another:

The picture in the corner is the Sol 158 MAHLI picture of the crevasse in the rock.

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