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The power of HiRISE
Stu
post Dec 21 2008, 10:15 PM
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Hmmm, you may be right. I'm just very impressed with the area in general. smile.gif


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OWW
post Dec 21 2008, 10:39 PM
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Easily impressed huh? blink.gif Dust, dust and... more dust.
To me this terrain looks much more diverse, interesting and....beautiful:
http://hirise.lpl.arizona.edu/PSP_009537_2045

Follow that riverbed at 50% zoom and be amazed.

And one weird crater:
http://hirise.lpl.arizona.edu/PSP_009320_2150
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Stu
post Dec 22 2008, 08:36 AM
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QUOTE (OWW @ Dec 21 2008, 10:39 PM) *
Easily impressed huh? blink.gif Dust, dust and... more dust.


I'm impressed by the thought of all that dust sliding down those slopes, yeah, cos I can imagine being there and seeing, what, dozens of avalanches of dark dust and stones hissing and slithering down the sides of the ridges or plateaus or whatever they are all around me, triggered by - what? Gentle rumblings in the rocks beneath the mighty volcanos that lie to the east? A tremor running through ground after a faraway impact?

Sometimes it's what you can't see that makes a martian landscape magical. wink.gif

Love your weirdy crater tho - present for you smile.gif

OWW's Crater


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OWW
post Dec 22 2008, 11:44 AM
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QUOTE (Stu @ Dec 22 2008, 09:36 AM) *
Sometimes it's what you can't see that makes a martian landscape magical. wink.gif

Then you're gonna Love this one: laugh.gif
http://hirise.lpl.arizona.edu/PSP_004390_1035

Here's another strange crater.... I THINK it was a crater once. unsure.gif
http://hirise.lpl.arizona.edu/PSP_010206_1975
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sariondil
post Dec 22 2008, 03:22 PM
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QUOTE (OWW @ Dec 21 2008, 10:58 PM) *
Me neither. smile.gif
But I don't see any layers. To me, it looks like they all begin at the top of the 'plateaus'.

There are some coarse layers (red lines in the attached image) in the underlying material (Medusae Fossae Formation according to the Geologic Map of the Western Equatorial Region) and some hints of fine-scale layering (see arrows). But these layers are apparently not the sources for the dust. It could be created by surficial weathering of the layered rocks, consistent with the observed sources near the top of slopes.
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mchan
post Dec 24 2008, 03:03 AM
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QUOTE (OWW @ Dec 21 2008, 02:39 PM) *
And one weird crater:

The Face that was Erased. Hoaxland will have a field day.
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Stu
post Jan 5 2009, 02:27 PM
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Couple of new ohmy.gif shots here...

More HiRISE highlights


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centsworth_II
post Jan 5 2009, 05:04 PM
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QUOTE (Stu @ Jan 5 2009, 09:27 AM) *
Couple of new ohmy.gif shots here...

Dancing with the stars!
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Nirgal
post Jan 5 2009, 05:16 PM
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full inline quote removed - mod

Wow: the perfect shot blink.gif

(and the perfect title, centworth II smile.gif
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tuvas
post Jan 25 2009, 05:12 PM
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QUOTE (akuo @ Dec 11 2008, 03:20 PM) *
AFAIR the noise problem was present only in some of the CCDs in Hirise's CCD array. Also the problem was remedied somewhat by warming(?) the CCDs.

I think the atmospheric conditions on Mars play a bigger role. That could be seen in some of the images taken during the major dust storm around rovers' regions.


The noise in HiRISE images was almost completely eliminated by warming up the CCDs prior to use, the only exception was that IR 10-1 is still a bit noisy, which was the worst of the CCDs. I think they might have even gotten rid of that one too, but it's been a while since I've checked...
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Stu
post Apr 23 2009, 07:19 PM
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HiRISE zooms in on Pavonis...

http://cumbriansky.wordpress.com/2009/04/2...s-in-on-pavonis



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Stu
post Apr 25 2009, 08:04 AM
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... and another "volcanic treat" from HiRISE...

http://cumbriansky.wordpress.com/2009/04/2...-volcanic-treat

Love that camera! smile.gif


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ngunn
post May 7 2009, 11:47 AM
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Stu, I hope you don't mind me posting this link here (since you haven't yet). I found it fascinating. Your impact sites seem to be arranged in a nice 'landing ellipse'! Several questions come to mind. Is the group statistically significant in terms of spatial and temporal density such that a common origin is a serious possibility? Is the 'landing ellipse' consistent with an atmospheric break-up, or is it too big? Folks here can shed light I'm sure.
http://cumbriansky.wordpress.com/2009/05/0...or-a-mars-base/
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nprev
post May 7 2009, 12:05 PM
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Shooting from the hip here, Stu's impact cluster (great find & great article, BTW, dude! smile.gif ) covers a very large amount of surface area, so I wouldn't expect them to originate from the atmospheric breakup of a single object. Mars' atmosphere is super-thin anyhow, and nowhere is it thinner than in the Tharsis Bulge area.

However, one interesting possibility is that this is what's left of the impact of five or more discrete objects that were once one, but were disrupted while still in space into a loose association separated by tens of km or more. Perhaps a small comet nucleus that had been fragmented after perihelion passage then had the misfortune to encounter Mars on the outbound leg?

</wild speculation mode>


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Stu
post May 7 2009, 02:08 PM
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Thanks guys, glad you found the post interesting. It's probably just a coincidence that those "fresh craters" are all in the same area (roughly), but hey, you never know. I just thought it was an interesting find. Man, I love HiRISE! smile.gif


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