Solander Point - Page 9

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Bill Harris


Posts: 3

Reply: 161



PostPosted: November 27, 2013 1:43 PM 

Remember, this material in the current outcrops is reworked impactites, both weathered and "fresh", as well as other sedimentary, volcanic and metamorphic rocks, also weathered and unweathered, as also undergoing weathering and erosion in-place here. Whereas the strong tectonics of the Earth constantly renews the surface, the weak tectonics on Mars promotes the recycling of the surface via impact processes.

As with any erosional process, the texture of the rock surface reflects the resistant/unresistant nature of the rock as well as the nature of the erosional process.

Interesting are, but it is for the most part a recap of what we've seen before. Oppy will need to go much lower in the section to examine older strata.

One recent image that is interesting is a partial MI image, which shows an unusual fractured rock clast and hairline fractures. You'll need to do a histogram stretch and contrast bump to see this.

Later...

--Bill

Bill Harris


Posts: 3

Reply: 162



PostPosted: November 27, 2013 1:47 PM 

Foo. Forgot to include the MI link:

--Bill

Dave


Posts: xxx

Reply: 163



PostPosted: November 27, 2013 5:57 PM 


In layman terms great impacts pulverize melt and scatter. Some were scattered eons ago and some not so long ago. This combines and twist things that were never together in the first place. Oh Henry, where are you son?

Makes you wonder how them berries got so purdy and uniform on top...

Dave


Posts: xxx

Reply: 164



PostPosted: November 27, 2013 6:40 PM 


The tracks are another matter. Compaction can cause a smooth surface and create a light scattering sheen. This can cause what is dark like asphalt to appear white, like the moon.

This works while the angle is such but up close is another matter. Horts track image above shows discoloration and "damp" spots. Years ago the thought of water ice crystals or free water in the regolith was folly. Today we learn more about water ice in hydrogen signatures in instrumentation along with visual anomalies.

So it is my premise that we are seeing both. Compaction and sheen reflection along with ice crystal exposure, melt and flash off.

This could get a little sticky at times. I am sure Hort has images to support "sticky."

Dave


Posts: xxx

Reply: 165



PostPosted: November 27, 2013 10:03 PM 


Im just a country "boy."

http://www.youtube.com/watch?v=I4s0nzsU1Wg

Barsoomer


Posts: 344

Reply: 166



PostPosted: November 27, 2013 10:31 PM 

Top of image towards the right: cylindrical hump.

In Horton's MI mosaic, there are, to my eye, similar cylindrical structures, but at a much smaller scale.

Dave


Posts: xxx

Reply: 167



PostPosted: November 27, 2013 10:48 PM 

Reality does get scattered..

http://www.youtube.com/watch?v=UCMS-NJ7VxU

hortonheardawho


Posts: 3465

Reply: 168



PostPosted: November 28, 2013 9:34 AM 

Sol 3499 ( Nov 27, 2013 ) panorama of rover tracks looking north on Solander Point:

and something different:

Sol 3492 ( Nov 20, 2013 ) fisheye panorama of Moreton Island rock outcrop:

with links to details with links to details.

Happy Thanksgiving from Solander Point, Mars.

hortonheardawho


Posts: 3465

Reply: 169



PostPosted: November 29, 2013 4:08 PM 

Sol 3498 ( Nov 26, 2013 ) colorized closeup MI panorama of Moreton Island outcrop: ( latest version )


Unfortunately the MI images were taken in the shadow of the rover and the colorizing pancams in direct sunlight.

I applied a "flat field" correction and smoothing to the MIs before the stitch and used an affine transform to match the pancam image to the MI pan.

Hardly worth the effort...

hortonheardawho


Posts: 3465

Reply: 170



PostPosted: November 30, 2013 12:54 PM 

Sol 3502 ( Nov 30, 2013 ) MI closeup panorama of peculiar rock tips on Moreton Island outcrop:

Sol 3502 ( Nov 30, 2013 ) MI enhanced difference colorized closeup of peculiar rock tips on Moreton Island outcrop:

Wo HOO! ( Happy dance around the room! ) WOO HOO!!

At long last the "big boys" are looking at the peculiar rock tips.

The closeup colorized with the enhanced difference false color pancam image is quite crude and obscures the details of the fuzzy patch of "stuff" on the tips - but it shows conclusively that the "stuff" is NOT atmospheric dust.

SO, lady and gents - what is it?

hortonheardawho


Posts: 3465

Reply: 171



PostPosted: November 30, 2013 1:35 PM 

Sol 3502 ( Nov 30, 2013 ) 3D MI closeup of peculiar rock tip on Moreton Island outcrop:

The 3D of this area should be quite exciting...

hortonheardawho


Posts: 3465

Reply: 172



PostPosted: December 2, 2013 1:19 PM 

Sol 3502 ( Nov 30, 2013 ) extended depth field ( EDF ) 3D MI closeup of peculiar rock tips on Moreton Island outcrop:

with location links.

The right eye ( left side ) image is the smoothed entended depth of focus image of three exposures and the left eye ( right side ) image is a smoothed image with ramp brightness shadow correction applied.

It's the best purse I can make out of these sow's ears.

Notice the complex network of white lines in the matrix rock behind the rock tips.

hortonheardawho


Posts: 3465

Reply: 173



PostPosted: December 2, 2013 2:33 PM 

Sol 3502 ( Nov 30, 2013 ) colorized extended depth field ( EDF ) 3D MI closeup of peculiar rock tips on Moreton Island outcrop:

OK, THIS is as good as it gets - from me. ( Come on JPL, strut your stuff. )

This image was created from 4 MI images and 7 pancam images - plus a decade of experience processing MER images.

SO - what do you see? WHAT?! Nothing worth writing about? Are you all on a tour bus in Philadelphia?

Thomas Lee Elfritz


Posts: 10

Reply: 174



PostPosted: December 2, 2013 3:25 PM 

I see impact breccia and fragments jumbled together and modified by water flowing down and past them from above. The smart thing to do at this point is after the winter is over, just turn the damn thing around and head back down into the crater. There is nothing here but a bunch of impact crap washed up a bit. Of course, that's not what they will do.

RJS


Posts: xxx

Reply: 175



PostPosted: December 2, 2013 3:32 PM 


Wow Hort; spectacular work @ 170 to 173; but especially 173! Could this be the "Whos" we've all been waiting for? Peculiar indeed! Anxious for one of the rock guys to label this one.

PS - Wish I was in Philadelphia; got to be warmer than here in the frozen north.

RJS


Posts: 125

Reply: 176



PostPosted: December 2, 2013 3:38 PM 


Sorry Thomas Lee, you posted before I hit the post button. Now we know, impact breccia and fragments. Should have guessed.

LWS


Posts: 3062

Reply: 177



PostPosted: December 2, 2013 9:00 PM 

Hort; Great Job.

RJS; I agree with your 175 but even though the Geology expert has labeled it impact Breccia and fragments. I think I see some dark pycnidia type structures near the tan tips. Hope time will tell.

I have some similar images from Oppy in my book. See URL above.

Winston

Thomas Lee Elifritz


Posts: 10

Reply: 178



PostPosted: December 2, 2013 10:20 PM 

Well, you asked me what I see, and I told you. I find it difficult to think of it as anything else since it appears to be eroding out of a large and old crater wall. Now presumably some of these fragments came from deep within the crater, but they will be jumbled up with a lot of surface material that was lying around at the time of impact. So I presume that is the source of the harder looking stuff, since the surface material is and was mostly evaporite. Thus I can't really comment on the internal structure, but I suggest that the outer sheen coating is a result of alteration.

hortonheardawho


Posts: 3465

Reply: 179



PostPosted: December 3, 2013 8:57 AM 

What is utterly depressing to me is a Flickr search Moreton Mars rock returns ONLY my pictures. No one outside of NASA seems interested in this small chunk of the universe.

Hey Thomas, thanks for your observations.

I hope that my images were useful in your analysis.

I think I will do something else for a while.

Kevin


Posts: xxx

Reply: 180



PostPosted: December 3, 2013 9:20 AM 

#173 I see a fossil of a Lizard but then again I am not geologist so I guess it's just a rock but I shall stick with Lizard.

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