Exploration of Cape York - Vol 5 - Page 3

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Author Message
Barsoomer


Posts: 344

Reply: 41



PostPosted: October 16, 2012 4:41 PM 

What look like scrape marks are visible in this navcam image.

Kye Goodwin


Posts: 1166

Reply: 42



PostPosted: October 17, 2012 10:12 PM 

Here's one of my favourite things to see: recent soil disturbance that doesn't seem to be caused by Oppy:

Left of center and just below center in the image, there are three fractures in a sandy slope, as if a weak surface crust has broken and slabs have moved slightly. There are two wider fractures close together running across the top of the slope and a fainter one lower down, Should we call it a sand avalanche or dust slide or more cautiously just a slope process? I would appreciate anyone's confirmation that they see the feature I'm describing. Is there another way altogether to interpret the area?

These little "landslides" are one of the few indications that anything is happening nowadays at Meridiani. To explain where the energy is coming from to make this slope movement a regular part of the the scene, there should be a process similar to the wind loading of dune crests and subsequent avalanching down the steep lee slope. We've seen what look like little avalanches in a few places at Meridiani and now at Gale Crater but we've yet to see a rover image of a dune with avalanching slopes.

Barsoomer


Posts: 344

Reply: 43



PostPosted: October 17, 2012 10:51 PM 

Pity there is not a 3D pair. Could be landslides, as you suggest, but might also be ripples or a dust-covered whitewater-like rock that has thin sheets piled on top of each other.

Barsoomer


Posts: 344

Reply: 44



PostPosted: October 17, 2012 11:16 PM 

Vines, um...I mean veins, that have spilled onto the soil next to the rock.

Context:

marsman


Posts: 303

Reply: 45



PostPosted: October 18, 2012 8:40 AM 

Barsoomer,

You're image post in Reply 44 is A1 weird, in my book. I wish that there was a better resolution picture for that one.

/R

marsman

Kye Goodwin


Posts: 1166

Reply: 46



PostPosted: October 18, 2012 12:54 PM 

Barsoomer, Thanks for your 43 responding to my 42. There are now binocular pairs of images available for this area:

With the 3D I still see fractures in a sand crust, but my perception of the slope shape is really different. The two larger fractures above now seem to run more up and down the slope than across it.

Barsoomer


Posts: 344

Reply: 47



PostPosted: October 18, 2012 3:53 PM 

This is a higher resolution pancam of the bottom part of the navcam context image in reply 44, but the part of interest to Marsman and myself doesn't seem to have made it down yet. Hopefully, it will be retransmitted.

Kye Goodwin


Posts: 1166

Reply: 48



PostPosted: October 18, 2012 5:09 PM 

Are these double "fills" that once lined both sides of the same fracture?:

We've seen a "fill without a fracture" before too, that is, a small straight linear raised ridge on a rock surface that has no apparent fracture under it. Now where did I file that image?

marsman


Posts: 303

Reply: 49



PostPosted: October 18, 2012 11:06 PM 

Previous post was rejected. This may be a duplicate.

I think that some of the "rinds" that we have seen on Mars could be explained as being a fossilized (or living?) microbial mat. On Earth, there is this:

The next link goes to a picture of a microbial mat in Yellowstone National Park. In this picture, there is Barsoomers' veins/vines in a living structure:


And in the next link, and at the same location, there is Kye's "fill's without a fracture" if you can envision something like this becoming fossilized and then covered in a layer of basaltic sand:

http://www.flickr.com/photos/21539776@N02/5498232852

/R

marsman

*** marsman, I fixed your Flickr link and deleted the subsequent attempts to post the image *** hortonheardawho

hortonheardawho


Posts: 3465

Reply: 50



PostPosted: October 18, 2012 11:37 PM 

Here are the sol 3101 and 3103 3D pairs.

Over 3100 sols - and counting.

The white rocks with berries is new:

A next science target?

marsman


Posts: 303

Reply: 51



PostPosted: October 19, 2012 12:15 AM 

This is one of the images for Reply 50 (and 51).

The other one does not have the html code for sharing on a blog, (which is unfortunate), so that one will have to accessed by going dircectly to its internet address.


marsman


Posts: 303

Reply: 52



PostPosted: October 19, 2012 12:18 AM 

Thank you very much for your help, horton!

V/R

marsman

Barsoomer


Posts: 344

Reply: 53



PostPosted: October 19, 2012 12:50 AM 

Horton's image: I think it looks like a dome feature where the roof has been removed.

John


Posts: xxx

Reply: 54



PostPosted: October 19, 2012 1:10 AM 

Marsman, I've been to Yellowstone and saw sticks, pine needles and such in the geyser pools. They fossilize with amazing rapidity in those conditions.

hortonheardawho


Posts: 3465

Reply: 55



PostPosted: October 19, 2012 3:45 PM 

Here are the sol 3014 and 3105 pancam 3D, including this incomplete one:

The Incas come to mind looking at this strange grid. Of course, this is a natural structure entirely unrelated to such things - right?

hortonheardawho


Posts: 3465

Reply: 56



PostPosted: October 19, 2012 8:50 PM 

sol 3096 3D colorized MI of brushed area on Whitewater Lake rock:

with location link.

Wonder when we will hear anything about the APXS results for this rock?

Barsoomer


Posts: 344

Reply: 57



PostPosted: October 19, 2012 10:26 PM 

Boxwork can be small scale as in reply 55 or large scale as discussed here

https://gsa.confex.com/gsa/2012AM/finalprogram/abstract_211271.htm

concerning Mount Sharp.

newboy


Posts: 1

Reply: 58



PostPosted: October 20, 2012 6:43 AM 

Re 50:
Not only the white rocks but what looks like a classic example of exfoliation weathering on the buried block in the top of the photo!

hortonheardawho


Posts: 3465

Reply: 59



PostPosted: October 20, 2012 9:49 AM 

sol 3105 ( Oct 18, 2012 ) 180 degree pan looking west towards Shoemaker ridge:

Here is the sol 3103 map.

Oppy moved about 40 meters up-slope on sol 3105 and today ( sol 3107 ) is a moving day - so another 30 meters west should put Oppy on top of the ridge.

Perhaps Oppy is practicing mountain climbing?

hortonheardawho


Posts: 3465

Reply: 60



PostPosted: October 20, 2012 2:18 PM 

sol 3107 ( Oct 20, 2012 ) 180 panorama looking west after 12-14 meter move:

Now about 50 meters from the sol 2751 position.

Perhaps they finally want to check out the Hooggenoeg rocks?

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