Interesting MOC pictures - Place to post interesting MOC pictures

REB · 2004-11-08 10:43:54

http://www.msss.com/moc_gallery/r10_r15 … jpg]Headin northeast of Opportunity is the Cassini Basin

I like that second large crater (About 1/3 down the page). Very artistic.

REB · 2004-11-08 15:27:24

http://www.msss.com/moc_gallery/r10_r15 … 5.jpg]This picture has some wierd looking features in it towards the bottom.

It doesn't looks teal as it reminds me of some of those Venus radar pictures.

Palomar · 2004-11-08 17:29:19

http://antwrp.gsfc.nasa.gov/apod/ap001114.html]3D Yardangs

*Groovy.

--Cindy

REB · 2004-11-09 09:52:07

Yardangs I always loved that name.

I have been digging aroung the Utopia Planitia today.

I found an interesting crater in http://www.msss.com/moc_gallery/r10_r15 … 559.jpg]My Webpage this picture. I am guessing that this is a shoreline of the late Northern Ocean. As the water dried, the ground shrunk towards the center of the crater, creating the circular cracks.

REB · 2004-11-09 09:55:07

Oh, I forgot this one. I found where the Martians are hanging out Check out the dark spot in http://www.msss.com/moc_gallery/r10_r15 … 9.jpg]this picture.

They are probably house size bolder, but besides their contrast to the surrounding terrain, I find their distribution interesting. Reminds me of vegetation growth- if only it was that.

REB · 2004-11-09 10:07:59

http://www.msss.com/moc_gallery/r10_r15 … 3.jpg]This Picture has a nice ice or debris tongue at the bottom of the crater. Notice what I call mollusk trails (for lack of anything better to call them. They look like the trails mollusk make in the sand) near the center of the crater- off the north side of the central peak. What are those meandering trails?

Palomar · 2004-11-09 12:19:44

http://www.spaceref.com/news/viewsr.html?pid=14461]Dune Variety

*Whoa Nellie. Cool... :up:

Dots & dots coming together. Mars is definitely one funky planet.

--Cindy

REB · 2004-11-09 12:36:27

Cool picture, Cindy! Pokka-dots.

Mars does have some strange features.

http://www.msss.com/moc_gallery/r10_r15 … 5.jpg]Here is another area with what looks like mud cracks.
This area would have been covered with the Northern Ocean. Notice how the crater is a more recent event then the cracks, having obliterated those around it. It looks like there may still be water frozen under the surface, as the impactor looks like it melted the ice.

REB · 2004-11-09 14:34:49

Mars is a strange place. http://www.msss.com/moc_gallery/r10_r15 … 3.jpg]This landscape looks like very dry and cracked skin. Very interesting. I bet water once covered this area.

REB · 2004-11-10 08:09:40

Cindy, if you like dunes, the north pole of Mars has interesting Dunes. I thought you would like http://www.msss.com/moc_gallery/r10_r15 … 3.jpg]this one, http://www.msss.com/moc_gallery/r10_r15 … 5.jpg]this one, http://www.msss.com/moc_gallery/r10_r15 … 1.jpg]this one, and http://www.msss.com/moc_gallery/r10_r15 … 9.jpg]this one.

REB · 2004-11-10 08:16:52

http://www.msss.com/moc_gallery/r10_r15 … 73.jpg]Not to be out done, the South Pole area of Mars has its own interesting features.

http://www.msss.com/moc_gallery/r10_r15 … 7.jpg]Here is one of Inca City near the South Pole

REB · 2004-11-10 08:24:54

http://www.msss.com/moc_gallery/r10_r15 … pg]Another Inca City picture. Like the picture I posted above, this one has more of what I call Mars spiders. They are near the bottom of the picture. I am not sure what these features are, but I suspect they have something to do with the freeze/thaw cycle. Crystallized carbon dioxide?

REB · 2004-11-11 11:00:14

http://www.msss.com/moc_gallery/r10_r15 … .html]Very nice gullies in Galle Crater

Nice meanders too. Looks like recent water carved them.

Palomar · 2004-11-11 12:06:56

http://www.spaceref.com/news/viewsr.html?pid=14490]A Tale of 3 Craters

*Fascinating. ???

Nice, lengthy caption too.

--T'Pring

(aka Cindy)

REB · 2004-11-11 12:19:45

Cindy, nice topic.http://www.msss.com/moc_gallery/r10_r15/images/R10/R1005415.html]This Noachis pit crater has been an interest of mine for a couple of years now. Like the crater in you article, I think this was has been buried and is now being exposed. I think it has a high content of frozen water.

REB · 2004-11-11 13:05:31

http://www.msss.com/moc_gallery/r03_r09 … l]Probably the weirdest terrain I have see on Mars.

This is in Hellas Basin, where temperature and pressure sometimes get to where liquid water will not boil away. When I first saw this terrain, my first thoughts where of taffy in a taffy machine. I suspect the ground here is some kind of gooey mud mixture that thaws and freezes over and over.

Palomar · 2004-11-17 06:21:40

http://www.spaceref.com/news/viewsr.html?pid=14534]w - o - w

*Looks like a beach. Remarkable pic for sure.

--Cindy

Palomar · 2004-11-18 11:17:50

Heres]http://www.spaceref.com/news/viewsr.html?pid=14538]Here's a groovy picture

*Really. Is inverted channels of Aeolis region. Wind erosion exposed these stream beds; sedimentary rock.

Robert, interesting images you've posted. Inca City always a favorite.

--Cindy

::EDIT:: http://www.spaceref.com/news/viewsr.htm … 4544]Small gullied crater Lots of interesting features. :up:

REB · 2004-11-18 12:27:34

Thanks Cindy. I probably will not have the time to dig through MOC pictures. I have started a new project that is taking up most of my time.

atomoid · 2004-11-19 04:13:28

Rivers of black sand relentlessly driven by the wind,
etching out the topography over the millions of years,
spilling and carving its way uphill http://www.marsunearthed.com/Anaglyphs/ … 151.htm]to the right in this picture.

Thankyou for http://images.spaceref.com/news/2004/20 … 52.gif]all of those excellent finds.
This one just cries out: "http://images.spaceref.com/news/2004/20 … if]aquifer".
But I think i'll make http://www.msss.com/moc_gallery/r03_r09 … 8.gif]this one my desktop.

Shaun Barrett · 2004-11-19 07:55:24

Well, Atomoid, your new desktop has some of the weirdest terrain I've ever seen!

Palomar · 2004-11-20 13:38:50

Well, Atomoid, your new desktop has some of the weirdest terrain I've ever seen!

*Yeah...what's up with that? ??? Psychiatrists on Mars will definitely use that pic in Marsian Rorschach. Weirdly beautiful.
Would be curious as to an explanation of *how* such landscape forms.

http://www.spaceref.com/news/viewsr.htm … 62]Tractus Catena Collapse Pits

*Some of those features are domes, it seems. The others look like they could be either domes or collapsed areas (yes, I know the caption says collapsed!). Reminds me of those doohickies relative to Marsian fault lines, where what looks like domes are really depressions in the ground. :-\

--Cindy

atomoid · 2004-11-20 15:42:32

Weirdly beautiful. Would be curious as to an explanation of *how* such landscape forms.
--Cindy

http://www.msss.com/moc_gallery/r03_r09 … .html]That weird image, (thanks REB for finding it) is of some West Hellas Planitia rugged terrain.

To me, it smacks of water-transported sediments. It really looks a bit like exhumed remnants of the type of meandering and overlapping swirls you get in marshes and estuaries as small streams drop their sediment and keep building their banks higher until they spill over into lower ground starting a new swirl pattern to occlude older ones. Either that or built-up travertine pool rim deposits. If sedimentary, it looks like the white swirly parts might be composed of sediments much like the light colored material at Opportunity's site. I wonder if we might find it too riddled with blueberries.

One weird thing about it is that the areas below the swirly parts looks as if it overlain by darker material, which appears to be riddled with many sand-fileld craters. If they are craters, which they appear to be, then its kind of odd because the craters appear to be much more abundant in this small area that has sand atop it, whereas the swirly parts have very few craters with the very noticeable exception being that crater smack-dab in the middle of the stream near the right of the image, the stream apparently seems to push around the crater hole bulging around it on either side as if to compensate. go figure...
???

Shaun Barrett · 2004-11-21 08:28:03

Thanks, Atomoid, for that interesting evaluation.
I have no background in geology but it's hard to imagine anything but water being responsible for such smooth swirling shapes.
Your idea that the area may have been part of an estuary or marshland certainly adds up, at least to my mind. The intricacy of the swirl pattern intrigues me; would water meander more in 0.38g than on an equally slight gradient in Earth's gravity? Or are there examples of similarly convoluted formations here?

As to the dust filled craters, it occurred to me that maybe they're not craters but sinkholes. Have a look at http://encyclopedia.thefreedictionary.com/sinkhole]THIS SITE, where it says:-

Sinkholes are usually but not always linked with a karst landscape. Karst represents a set of surface features that are characteristic of limestone under the soil. In many such regions, there may be hundreds or even thousands of sinkholes in a small area so that the earth as seen from the air looks pock-marked. Often, in such areas, there are few or no flowing streams on the surface because the drainage is all sub-surface.

Suppose Hellas was once an 'inland sea'. Then suppose much of the water dried up, leaving various low-lying marshy areas where the last of the surface water flowed sluggishly, leaving the weird sedimentary 'fossil streams' in this image. Perhaps, when the last of the surface water was gone, subsurface water carved underground caves in the limestone (if it is limestone), later leading to the collapsed caves which are seen from the surface as multiple sinkholes, now nearly filled with sand and dust.

As usual with martian geology, I'm making it all up as I go along! But does the idea that those circular features are sinkholes fit into your scenario better than craters, Atomoid?
If so, does it enable you to say anything more about what we're looking at here? (You obviously know more about geology than I do - which isn't much of a compliment, believe me! )

atomoid · 2004-11-21 14:14:41

As usual with martian geology, I'm making it all up as I go along! But does the idea that those circular features are sinkholes fit into your scenario better than craters, Atomoid?
If so, does it enable you to say anything more about what we're looking at here? (You obviously know more about geology than I do - which isn't much of a compliment, believe me! )

I hadn't even considered that idea, and thats what i love about these forums, i just throw out my partially-educated guess on what i see and wait for one of the several experts (or novice like you and I) in these threads to come along throw a devils-advocate wrench into the idea or straighten it out*.

Hellas basin, being by far the lowest point on Mars, must have seen its days as a deep inland sea for a signifficantly long period of time, im not sure what elevation these features are in relation to the average depoth of Hellas, but sinkholes explain the lack of adjacent "crater-like" features better than craters... hmmm...

*footnote:
Not that i have ever taken a college level geology course, its all just stuff i gathered over the last 10 years mostly from reading http://www.sciencenews.org/]Science News and http://www.sciam.com/]Scientific American usually while sitting on the toilet, the "seat of reason" (just what was the thinking guy in Rodan's sculpture sitting on anyway?), probably where most scientific breakthroughs are born, but i digress... (sorry if i offended anyone with such a poignant reference!). but seriously!

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