Help searching HiRISE images |
Help searching HiRISE images |
Mar 10 2009, 02:01 PM
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#16
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Junior Member Group: Members Posts: 57 Joined: 17-May 06 From: Houston, Texas Member No.: 776 |
Wow. When this is your first pick - yes, I can see "addictive", alright: http://hirise-pds.lpl.arizona.edu/PDS/EXTR...RED.abrowse.jpg Lateral moraines, yes? I have been thinking that very same thing every since I studied the MOC images from this area. -------------------- |
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Mar 10 2009, 02:06 PM
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#17
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Junior Member Group: Members Posts: 57 Joined: 17-May 06 From: Houston, Texas Member No.: 776 |
You and me both! To me, this looks like Hellas was once situated on or near a pole. That looks like the polar layered terrain, except that all the ice has been removed. You see a lot of that taffy-like look at the edges of some of the polar layered terrain, it's highly reminiscent of these images of Hellas. I would be very, very skeptical of the idea that you're seeing old terrain that used to underlie Hellas. When a basin that large is formed, you pretty well demolish the entire target, sometimes to depths well into the mantle. These landforms are far more well preserved than anything I would expect to see underneath the basin floor. Also, on Mars, a basin like this would fill in over time, not be continually scoured down to below the original basin floor. I'd almost have to believe that anything we see on the floor of Hellas has been deposited since the basin's formation. -the other Doug Some of the features look like eroded domes, but that can't account for it all. The impact had to melted the basin. It probably stayed hot for a long time. I don't know if that caused any of what we are seeing. I have studied geology (I minored in it and taught it) and I can't find anything on Earth that is similar to this. I have seen the folds in the Rocky Mountains, but that was due to plate tectonics. I don't know what this is. I wish they would send a lander with a rover into Hellas. -------------------- |
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Mar 12 2009, 05:18 PM
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#18
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Junior Member Group: Members Posts: 57 Joined: 17-May 06 From: Houston, Texas Member No.: 776 |
Could there be a glacier like slurry of ice and rock slowly flowing across this surface? If that is true there should be deformed craters. I have spotted what may be a couple. However there is a lot of round craters. If this stuff was moving, it has either stopped, or is moving very slow.
Here is another shot -------------------- |
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Mar 12 2009, 06:27 PM
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#19
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
I don't know that the landforms are in notion... and like I say, they resemble, to me, what we see in some of the polar areas. For example, here's an image of an area where several types of north polar terrains are exposed. I see a lot of resemblance here to what you've pointed out in Hellas and what we see in the polar regions:
Polar terrains See what I mean? There are a lot of places in current polar terrain that look like this, too... -the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Mar 12 2009, 07:03 PM
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#20
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Junior Member Group: Members Posts: 57 Joined: 17-May 06 From: Houston, Texas Member No.: 776 |
I don't know that the landforms are in notion... and like I say, they resemble, to me, what we see in some of the polar areas. For example, here's an image of an area where several types of north polar terrains are exposed. I see a lot of resemblance here to what you've pointed out in Hellas and what we see in the polar regions: Polar terrains See what I mean? There are a lot of places in current polar terrain that look like this, too... -the other Doug Maybe. Longer monitoring of the area...and a lander... might help -------------------- |
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Mar 12 2009, 07:46 PM
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#21
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Glad you're all having fun with that site! Told you it was addictive!
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Mar 13 2009, 01:05 PM
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#22
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Junior Member Group: Members Posts: 57 Joined: 17-May 06 From: Houston, Texas Member No.: 776 |
Glad you're all having fun with that site! Told you it was addictive! So I can blame you for my addiction Actually, This just furthers my addiction. I don't know how many hours I spent pouring over the MOC images over the years. I bet my wife knows -------------------- |
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Mar 13 2009, 06:58 PM
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#23
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Member Group: Members Posts: 234 Joined: 8-May 05 Member No.: 381 |
I haven't been able to access the HiRISE image map at "global-data.mars.asu.edu" for the last two days. I'm assuming that the map is offline to load the latest PDS release of HiRISE images. Can anyone confirm this or provide any other insight to this problem. Thanks.
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Mar 14 2009, 05:36 PM
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#24
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
I can't get on the site either - any of the maps, actually. I've emailed them to ask what the problem is.
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Mar 14 2009, 08:06 PM
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#25
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Member Group: Members Posts: 234 Joined: 8-May 05 Member No.: 381 |
I'm able to get the HiRISE image map now. It must have been that the site was down to load the March PDS release images.
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