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Google Mars- Questions about Mars |
 Mar 19 2006, 06:34 PM
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#1
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Newbie  Group: Members Posts: 6 Joined: 19-March 06 Member No.: 717  |
Hi guys,
I just registered because I would like to know if anybody has got explanations for certain features appearing in the Mars surface and visible with Google Mars... Can anybody tell me why the lower regions (in blue) are clearly less cratered than the higher ones (orange-red)? Is it possible that those lower regions were filled up long time ago with water and therefore the craters were eroded? What about some features that seem to be rivers? ... does anybody know if there is any scientific explanation for that? Does anybody know what does the scientific community have to say for the same? Thanks in advance for your responses and regards. |
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Mar 19 2006, 06:51 PM
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 Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Hi Alex, welcome to the forum.
Just so you know, there is already a thread on Google Mars here: http://www.unmannedspaceflight.com/index.p...indpost&p=45317 You might want to check it out first to see if anyone has already answered your questions. -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Mar 19 2006, 08:43 PM
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#3
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Senior Member Group: Members Posts: 2558 Joined: 13-September 05 Member No.: 497 |
QUOTE (Alex @ Mar 19 2006, 10:34 AM)  Can anybody tell me why the lower regions (in blue) are clearly less cratered than the higher ones (orange-red)? Is it possible that those lower regions were filled up long time ago with water and therefore the craters were eroded? What about some features that seem to be rivers? ... does anybody know if there is any scientific explanation for that? Does anybody know what does the scientific community have to say for the same? http://www.msss.com/http/ps/intro.html may answer some of your questions. To summarize: it's generally thought that the less-cratered areas of Mars were resurfaced by lava towards the end of the period of heavy bombardment when most craters were formed. One need not invoke an ocean to account for this "global dichotomy" -- see http://www.msss.com/http/ps/di.html and http://www.msss.com/http/ps/age2.html The "rivers" are generally considered to be, well, rivers, formed in a period when Mars was wetter, although such features can be formed by more subtle but still water-related action, such as sapping -- see http://www.msss.com/http/ps/channels/channels.html -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Mar 19 2006, 10:53 PM
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#4
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Newbie Group: Members Posts: 6 Joined: 19-March 06 Member No.: 717 |
QUOTE (mcaplinger @ Mar 19 2006, 09:43 PM) http://www.msss.com/http/ps/intro.html may answer some of your questions. To summarize: it's generally thought that the less-cratered areas of Mars were resurfaced by lava towards the end of the period of heavy bombardment when most craters were formed. One need not invoke an ocean to account for this "global dichotomy" -- see http://www.msss.com/http/ps/di.html and http://www.msss.com/http/ps/age2.html The "rivers" are generally considered to be, well, rivers, formed in a period when Mars was wetter, although such features can be formed by more subtle but still water-related action, such as sapping -- see http://www.msss.com/http/ps/channels/channels.html Hey, thanks for the links... that gives me all the answers I was looking for. Shame though... I thought that water could have eroded the craters ;-) Anyway I don't give up, hope that the MRO could give us new exciting discoveries |
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| Guest_AlexBlackwell_* |
Mar 20 2006, 03:58 PM
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Guests |
QUOTE (Alex @ Mar 19 2006, 10:53 PM) Hey, thanks for the links... that gives me all the answers I was looking for. I'm sure Mike appreciates that 
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