Trek to Solander Point - Page 8

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PostPosted: July 24, 2013 8:55 AM 

sol 3376 ( Jul 23, 2013 ) front hazcam view after 4 meter drive:

This is likely the target "Black Shoulder". Perhaps it will get the "full weekend science treatment" - including a brush before the APXS and MIs?

Bill Harris

Posts: 3

Reply: 142

PostPosted: July 24, 2013 9:35 AM 

How long can you hold your breath? More likely Oppy will sit here twiddling her rocker-bogies for a few Sols, the move on, citing "time constraints".

Nothing listed in Tracking 'cept a Deimos transit (yawn). Sorry, I've gotten hopes up before only to have them dashed...



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PostPosted: July 24, 2013 10:59 AM 

Sol 3376 ( Jul 23, 2013 ) enhanced difference false color 3D of rock "Black Shoulder" in Botany Bay:

My record time breath holding is 3:26 at 5 meters underwater.

Bill Harris

Posts: 3

Reply: 144

PostPosted: July 24, 2013 12:51 PM 

Ah, they snuk some imagery in whilst I was out picking blueberries (home-growed terrestrial) and grapes.

Site "Black Shoulder" looks about as I'd anticipated in color (True and Difference) It is massively-bedded or we might be looking down on a bedding plane. Coarsely-grained with the possibility of larger clasts on the right side. In the lower left and center is a buff-colored, finer-grained and possibly softer interbedded material. The color of the rock is that medium-brown that we've seen in clastics before, but with an underlying tint of our old friend Burple. And it appears that the "channel" ahead contains several variations of a similar provenance of this lithology.

My initial opinionization, subject to change if or when we get more data...



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PostPosted: July 24, 2013 1:27 PM 

Ah. Wilmington, NC, blueberries?


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PostPosted: July 24, 2013 2:49 PM 

Speaking of transits:

Another one today ( sol 3367 ). So far no planned observations of Black Shoulder posted.


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PostPosted: July 25, 2013 4:33 PM 

A bunch of Sol 3344 (Jun 21, 2013 ) 3D color images from Knobby's Head are now available - including this one:

I never get tired of the rover tracks in the Martian soil.

Today ( sol 3378 ) is an MI and APXS day. After the science it's back to the trek to the Point:

Bill Harris

Posts: 3

Reply: 148

PostPosted: July 25, 2013 7:33 PM 

And down the pipeline, finally, are the color images of "The Knob of Nobby's Head", made on Sol-3344 just before another southward dash. Initial impression of these snapshots is that these sites are typical exposures of the impactite, like we saw at Cape York. Now comes the fun part of matching the detailed color Pancam images with the wider context images.

Here is a list of the post Cape York named features:

03316 p2369.32 pancam_Bulldust_outcrop_5x1_L234567Rall
03316 p2370.32 pancam_outcrop_NE_2x1_L257R2
03317 p2372.32 pancam_Ring_Tail_4x1_L257R2

03325 p2585.31 pancam_Solander_Point L257R2
03325 p2376.32 pancam_Sutherland_Contact_1x2_L257R2
03325 p2377.32 pancam_Sutherland_Outcrop_3x1_L257R2

03330 p2587.31 pancam_Wallaroo_L27
03333 p2588.31 pancam_Gnarlaroo_half_L257R257
03339 p2590.31 pancam_Nobbi_L257R2

03344 p2592.31 pancam_Numbat_L257R12467
03344 p2593.31 pancam_Hornby_L257R2
03344 p2594.31 pancam_Mulga_L257R12467
03344 p2595.31 pancam_Chameleon_L257R
03344 p2596.31 pancam_Jacky_L257R12467
03346 p2391.32 pancam_Signal_Head _3x1 L257R2
03346 p2391.32 pancam_Canegrass_2x1_L257R2
03346 p2597.31 pancam_Gibber_Earless_L234567Rall

03350 p2599.31 pancam_Thorny_Devil_L257R2
03353 p2530.32 pancam_Tawny_L234567Rall
03355 p2531.32 pancam_Lake_Eyre_L257R2

03362 p2534.32 pancam_Musky_Rat_Kangaroo_L257R12467

03366 p2406.32 pancam_ripples_Nullarbor_3x1_L2R2

03369 p2410.32 pancam_Contact_2x2_L257R2
03369 p2535.32 pancam_Salt_Pan_L257R2
03371 p2412.32 pancam_Charlie_Brown_3x1_L257R2
03376 p2537.32 pancam_Black_Shoulder_L257R2


Bill Harris

Posts: 3

Reply: 149

PostPosted: July 26, 2013 6:09 AM 

Trundle on down to Exploratorium, fresh MIs of target Black Shoulder are online.

Very low lighting angle emphasising the surface texture. Pareidolia abound, so there is something for everybody. Wink



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PostPosted: July 26, 2013 6:22 AM 

Sol 3378 (Jul 26, 2013 ) MI closeup panorama of Black Shoulder rock in Botany Bay:

with location and 3D links.

I applied a square root transform to bring out details in the shadows.

So. All the structure is from erosion after clasts fell out of the matrix rock?

Yeah. Sure.

Bill Harris

Posts: 3

Reply: 151

PostPosted: July 26, 2013 11:50 AM 

Here is a cross-eyed stereo pair of MI at target Black Shoulder, Sol-3376:

Clearly a clastic sedimentary rock, with interesting weathering.


Bill Harris

Posts: 3

Reply: 152

PostPosted: July 26, 2013 12:19 PM 

The latest field report from Larry Crumpler, Sol 3378 - July 25, 2013:


A little information the current Traverse stop, plus discussion of near-future plans.



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Reply: 153

PostPosted: July 27, 2013 9:13 AM 

Sol 3353 ( Jun 30, 2013 ) infrared / visible enhanced difference false color 3D of rock "Tawny" in Botany Bay:

This single image should be a topic of it's own as it summarizes about a dozen odd things about Meridiani rocks and soil. But I'm just the "image guy", so I will leave it up to the life guys and the rock guys to battle it out - if they have any more interest in Mars.

I'll start.

Notice that the freshly exposed surface of the rock is blue / red ( infrared / visible . Why?

Notice that the atmospheric dust ( white / yellow ) covers only the rock and not the surrounding soil. Why?

Notice the tiny grains that make up the pattern on the rock. Now notice the single tiny grain on a "stalk" jutting out from such a pattern on the edge of the rock ( you will need to look in 3D to see the grain. ). Why?

I have to take care of my mom for a few hours. I will leave it up to others to continue the discussion for a while.


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Reply: 154

PostPosted: July 27, 2013 1:11 PM 

After studying all the MI 3D of Black Shoulder ( you really have to study the rock in 3D ) I think that at least some of the large voids in the rock were caused by trapped gas which was released by blowing holes in the matrix rock.

I suspect the gas was water vapor, perhaps seeping into the rock from far below Endeavour; perhaps sublimated from bits of ice trapped in the rock matrix when it was created and just now being warmed enough to sublimate.

The most exciting possibility is that the gas is currently being released seasonally - which could be detected from orbit.

The larger voids in the rock are too big and too irregular to be blueberry holes. In some of the voids you can see material from the walls that have fallen back into the void and in others the usual SOD has collected.

Mars. Damn queer place.

John Henry Dough

Posts: xxx

Reply: 155

PostPosted: July 27, 2013 4:03 PM 

Dried in place mud.
The voids being escaping gas.
That's my idea,,,,what is yours?


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PostPosted: July 27, 2013 4:55 PM 

The plan for today ( sol 3380 ) includes 16 critical MIs plus the usual focus and 3D offsets. Steve must have seen something he liked in the APXS results. Yay science!

Still playing catchup with the images. Here is the "latest" from sol 3349 ( Jun 26, 2013 ) - about a month ago:

This is a synthetic color 3D with square root transforms, vignette correction, color correction and brightness and contrast adjustments applied.

This is Flickr image 17,001 that I have posted! About 95% are Mars related.

Virtually every Mars image I have posted to Flickr required image processing as complex - or more so - than I just did for the above image.

NOW, about Black Shoulder...

Er, does anyone know what the "Black Shoulder" reference is?

My best guess from google is that it was an ancient Lead mine in Scotland.

Bill Harris

Posts: 3

Reply: 157

PostPosted: July 27, 2013 8:56 PM 

My initial impression of Black Shoulder was nice clastic rock. The closer I looked the odder it looked, particularly with respect to the matrix/cementing. The voids/cavities are more and more peculiar. First impression was popped-out clasts. Next impression was... chestbursters

But seriously, we need closer and closer looks, possibly with less dramatic lighting. And a RAT.

Tawny is odd. Not only run over by Oppy but also fractured (reddish area in lower left). Similar in texture to those rocks at Olympia (Erebus Crater) and some on the approach to CY ("Meridiani Onlap") that showed the "festoons". More on that later-- we have more filter images today.

Remember, we're not looking at one thing and one when. This is an area with multiple ages and environments all overlapping.

And a couple of new site names today:

03380 p2538.32 pancam_Mallee_Heath_L257R2
03380 p2539.32 pancam_Rusty_Crevice_L257R2


*** I changed the bad link to another chestburster cartoon.


Posts: 3465

Reply: 158

PostPosted: July 28, 2013 10:37 AM 

Perhaps some of the weirdness is related to Ichnofossils?

I am waiting for the last sol 3380 3D pair to be posted ( 7 of 8 already down and posted on Flickr ) before I do the MI panorama.

Unfortunately, Flickr seems to be having an indexing problem and the search function is not returning the latest images - so you will have to start here.

Bill Harris

Posts: 3

Reply: 159

PostPosted: July 28, 2013 4:48 PM 

Yes, I've been drooling over the current MIs since the early AM today. I've been doing ad-lib stereo paits and waiting until all (most) of the imagery gets in so I can sort through the lateral-shift, the focus-shift and the stereo-shift images. Viewing the target though the perspective of the MI-context FHazcam images, I am now inclined to thik that this face is a cross bedding plane section Ah, the variety of the sizes and shapes of the clasts comprising the rock speaks volumes about the weathering, erosional and depositional history of this rock, and that doesn't even start on the lithification processes involved.

A(nother) side project I'm starting is looking at the Black Shoulder area MIs for the particle size and particle shape (angularity) distributions. Nowadays in the bio-med field there are software packages that do just that with cell cultures, but I think I'll have to delineate representative strips and do a manual count by eye.


Kye Goodwin

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Reply: 160

PostPosted: July 29, 2013 2:51 AM 

The bright layered rock has never looked like this before:

That image is pretty convincing that we can see some of the individual grains from the time of deposition. This has never been so clear; everywhere else along the traverse the bright rock has appeared fine grained except for spherules. I think that this change in the texture of the rock is correlated with our approach to the cape. Maybe the rock will get coarser ahead. As at the other capes the character of the rock appears to change gradually as Oppy approaches Solander.

There are big "spherules" here again as on the approach to Cape York:

Most of those big particles on the rock look loose but a few appear embedded. These had better be concretions if they are in the rock. Otherwise they are death to the aeolian theory.

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