A question here, behaviour of water on Mars |
A question here, behaviour of water on Mars |
May 24 2007, 12:38 AM
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Junior Member Group: Members Posts: 58 Joined: 17-September 06 Member No.: 1150 |
A question here
There are signs that in the past there was liquid water on Mars. So lets assume thats true. Since the gravity on Mars is much lower than on Earth, so how does water (waves) behave on Mars compared to Earth? Someone did say, that waves would have been much higher but also much slower. Is this true? Does anyone have an animation where you can see a waive on Earth in comparsion to a wave on Mars? Thanks |
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May 17 2008, 07:17 AM
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
As a general comment to the "discovery" that Mars' crust (for want of a better term) is thick and firm, I thought that had been "discovered" back in the early- to mid-70s when it was found that the Tharsis Plateau was sitting on top of the original crust, which hadn't deformed to a really significant degree. The planet is roughly spherical with a significant bulge above the mean where Tharsis sits.
If the planet can vomit trillions of tons of lava onto a quarter of its surface and the crust doesn't deform a tremendous amount, I can't imagine the lack of polar compression is all that surprising. BTW -- yes, I know that Tharsis is surrounded by rift valleys formed by compression of the crust under Tharsis. I didn't say there was zero compression. But the mass of lava that makes up the bulge is far greater than the mass of either permanent polar cap, and, unlike the seasonal polar caps, once emplaced the lavas didn't come and go seasonally. The point I recall from Mariner 9 and Viking orbiter data is that Mars is quite significantly out-of-round because a vast majority of the height of the Tharsis lava pile has not been pulled back down to mean over several billion years, which led the scientists of the day to conclude Mars' crust must be very thick and solid... -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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