YellowKnife Bay - Page 8

Previous 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 Next
Author Message

Posts: 3062

Reply: 141

PostPosted: January 26, 2013 5:51 PM 


Keep 'em coming.



Posts: 1

Reply: 142

PostPosted: January 27, 2013 6:02 PM 


You do not have a 'small' mind. you are observing geology without geological bias.
And why not? For me, I suffer from this bias. And if I didn't enjoy this blog, I'd spend all my time at the other place.

Your views have nothing to do with the fact that I have a bunch of observational bias that explains what we see without using extraordinary (to my mind) claims. That's what prompted the question. I just wanted to know why you said what you did.

Symmetry occurs in inorganic materials. It is very common. For example, think of crystals.

I have edited the attached photo to show symmetry in the array of veins which Hort showed in 121. This is not accidental. Note the the 'double walls', strong parallelism, is a result of the veining process (and weathering). The other directions visible that I believe repeat in the image are also due to geological processes, without needing the participation of life. I find that tremendously exciting in itself. Martian geology is similar but different. For anyone who has discovered rocks on this blog, I would be delighted to explain geology if they are interested.

Note that I think I am one of the few geotypes left here, as others felt that the refusal to accept geological explanations by some is ignorance. This I do not agree with.
But you will have to put up with me pointing out 'boring' geological explanations. You can be certain that I will be delighted if we see something that points to life, today or in the past (i.e. trace fossils or fossils). I am not in the school of thought that says NASA/JPL will do anything to avoid finding life. (I can agree that they're not trying very hard, but that's because they are being very conservative for a wide variety of reasons).


Posts: 3465

Reply: 143

PostPosted: January 28, 2013 8:46 AM 

sol 0170 of rock drill ready for action:

and here is a spot that the team is most curious about:

with location links.


Posts: xxx

Reply: 144

PostPosted: January 28, 2013 8:47 PM 

You make the call:

The "Mars flower" looks identical to the earth analogue if you look closely at the texture.

So, it seems to be that the "so what" V-shaped objects are the so-called microbial mat. Or, in plain English, life on Mars.


Posts: xxx

Reply: 145

PostPosted: January 28, 2013 11:41 PM 

Maybe I'm the last to the party, but the domed V-objects are clearly resemble stromatolites or thrombolites.


This would explain why there are so many of them close together in an area they said had water. It seems to me like it would also explain how they knew how shallow the water was and how slowly it flowed.


Posts: 3465

Reply: 146

PostPosted: January 30, 2013 8:37 AM 

Sol 0172 Chemcam view of rock drill bit (after use?):

and here are all the views of the bit. There appears to be debris on the bit - so I'm guessing it has been used.

From Curiosity Maneuver Prepares for Drilling:

Remaining preparatory steps will take at least the rest of this week. Some of these steps are hardware checks. Others will evaluate characteristics of the rock material at the selected drilling site on a patch of flat, veined rock called "John Klein."

Limonadi said, "We are proceeding with caution in the approach to Curiosity's first drilling. This is challenging. It will be the first time any robot has drilled into a rock to collect a sample on Mars."

An activity called the "drill-on-rock checkout" will use the hammering action of Curiosity's drill briefly, without rotation of the drill bit, for assurance that the back-and-forth percussion mechanism and associated control system are properly tuned for hitting a rock.

A subsequent activity called "mini-drill" is designed to produce a small ring of tailings -- powder resulting from drilling -- on the surface of the rock while penetrating less than eight-tenths of an inch (2 centimeters). This activity will not go deep enough to push rock powder into the drill's sample-gathering chamber. Limonadi said, "The purpose is to see whether the tailings are behaving the way we expect. Do they look like dry powder? That's what we want to confirm."

Ah: no actual drilling with sample collection for maybe a week! And even then the first samples will be discarded.

More about the drilling operation here.

I like Stu's take on the drill bit here. Sometimes it takes a poet to make the connections.


Posts: xxx

Reply: 147

PostPosted: January 30, 2013 10:49 PM 

Stromatolite from Sol 171.


Posts: 692

Reply: 148

PostPosted: January 31, 2013 1:40 AM 

That bit seems a 'bit' damaged thru mine eyes. Maybe they pushed to hard into the rock. And the steel around the diamond edge may have been brittle because of low ambient temperatures. Just a guess.


Posts: 3062

Reply: 149

PostPosted: January 31, 2013 8:17 AM 

Mizar; I partially agree with you but the tip of the bit looks like a different design to any I've seen for boring into concrete etc. The area that looks damaged looks so because the groove that leads borings away is filled with that stuff, but nevertheless it looks like there might be some small damage on the surface.

I think you also pointed out sometime ago that the wheels, unlike the MER wheels, seem to have an unexpected signifcant number of obvious scratches and dents.

Wildcat; Nice stromatolite comparison above. Have you seen my ebook "In search of life on Mars" on Kindle and the apple ebook store? I have some similar comparisons of Opportunity rocks and stromatolites there.



Posts: 3062

Reply: 150

PostPosted: January 31, 2013 3:08 PM 

Very interesting rocks with strong bio-like morphological characteristics. Note anastomosing of rootlike structure next to the Possibly gypsum vein. Wonder if we'll get info on the total chemical characteristics of these objects?



Posts: 3062

Reply: 151

PostPosted: January 31, 2013 6:19 PM 

The image I referred to above was this one.


Paul Scott Anderson

Posts: 53

Reply: 152

PostPosted: February 1, 2013 8:00 PM 

Ok, what is this little pedastal-like thing sticking out of the bedrock with the shiny bits on it? Sol 173, top middle of image.

John Henry Dough

Posts: xxx

Reply: 153

PostPosted: February 2, 2013 1:29 AM 

Nice stromatolite comparison above

Please remember these rocks were formed under one third Earth Gravity,,,,making an exact comparison with ANY Earth rock totally impossible,stromalite features perhaps but nowhere the mass nor density,,,two things that are totally dependent of Gravity,

I know it is hard to wrap the mind around but everything on Mars is different,Everything.

Those small shiny parts of the pedestal may be metal/nickle base,,,or not.


Posts: 250

Reply: 154

PostPosted: February 2, 2013 6:47 AM 

Paul, to me it looks like the common Martian (just-) rock-flower - the big version. Very Happy

Looking forward to some nice 3D of it.

Paul Scott Anderson

Posts: 53

Reply: 155

PostPosted: February 2, 2013 9:10 PM 

It's being discussed on the other forum, too. The shiny bits may be the same as others seen before, but in this case they are on top of that little "pedestal." I wonder also if it's the same material as the "flower"...? I'd like to see a MAHLI close-up view. Smile

Kye Goodwin

Posts: 1166

Reply: 156

PostPosted: February 4, 2013 12:59 AM 

Here's a good example at Gale of what I've been calling sharp little trenches, which also occur in similar habitats at Meridiani:

One side of the trench is usually the edge of a rock, but the other wall, the one facing us in this case, sure looks like soil. A little crust block seems to be in the process of falling in. These do not seem to be aeolian moats, which should be more streamlined and would not likely form in crusted soil. I've noted about 10 of these structures at Gale, which makes them fairly common in a way, but they are quite rare compared with the great length of margins where rocks meet soil. I wonder how they form and why the process happens only here and there?


Posts: 56

Reply: 157

PostPosted: February 4, 2013 6:48 AM 

@Kye Goodwin Yes, we have seen these "trenches" before. Our weatherman Fred used to call them Vents. There are several pictures that show cracks in the soil, that look like they were formed by hydrothermal (or methane, who knows?) activity. There has been signs of the existence of hydrothermal vents on Mars. Logic tells me that these vents or trenches have been "active" or were formed fairly recently, as I would suspect that these vents / trenches would be filled up with dust fairly quick.


Posts: 1

Reply: 158

PostPosted: February 4, 2013 10:33 AM 

Many days later,my reply to you at 142 appears. Why?

Regarding the trench in 156, it looks like a collapse into a void created below. What has been removed? Ice melting?


Posts: xxx

Reply: 159

PostPosted: February 6, 2013 8:25 PM 

A gigantic GigaPan collage of both MastCams and the rover self portrait (MAHLI). Enjoy. Smile


Posts: 3062

Reply: 160

PostPosted: February 7, 2013 6:49 AM 

Today's Mahli images are very interesting. Looks like the drill has uncovered a damp sub soil layer. I suspect there are lots of bio materials there. No typical dust evident, just clods.


Previous 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 Next

Join the conversation:

Very Happy Smile Sad Surprised
Shocked Confused Cool Laughing
Mad Razz Embarassed Crying or Very Sad
Evil or Very Mad Twisted Evil Rolling Eyes Wink
Powered by MTSmileys