Iapetus - Black on white or white on black? |
Iapetus - Black on white or white on black? |
Sep 14 2007, 07:40 AM
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#1
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Member Group: Members Posts: 813 Joined: 8-February 04 From: Arabia Terra Member No.: 12 |
Seems to be a lot of dispute on this subject... I think it's ice from the interior, but what does everyone else think?
Edit: This world seems very complex so the question could perhaps be phrased as 'which of these options is most responsible for the Iapetan dichotomy?' |
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Sep 18 2007, 08:24 AM
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#2
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
What can I say.. just look at this d__n stuff... At this latitude, ALMOST none of it is on a horizontal surface, it's almost ALL on slopes, facing noonday sun. Not quite all, but the stuff in the lower left basin rim setment is the totally classic example. I can't avoid the conclusion, as I said above, that some process has caused it to creep against gravity, to accumulate on surfaces perpendicular to the sun's rays at mid-day.
Igor... it's alive..... IT'S ALIVE!!!!!!!! <master.... you didn't take your medicine this morning!> (data taken and sharpend from UGordon's big b&w mosaic) |
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Sep 20 2007, 01:34 PM
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#3
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Member Group: Members Posts: 524 Joined: 24-November 04 From: Heraklion, GR. Member No.: 112 |
What can I say.. just look at this d__n stuff... At this latitude, ALMOST none of it is on a horizontal surface, it's almost ALL on slopes, facing noonday sun. Not quite all, but the stuff in the lower left basin rim setment is the totally classic example. I can't avoid the conclusion, as I said above, that some process has caused it to creep against gravity, to accumulate on surfaces perpendicular to the sun's rays at mid-day. (data taken and sharpend from UGordon's big b&w mosaic) Ed, I think that the image you posted is from an area where we see white ice on top of black soil. So it is just the walls of the basin that are black. The original released image can be found here. I attached a rotated version that matches the orientation in your image. |
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Sep 20 2007, 01:45 PM
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#4
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
I think that the image you posted is from an area where we see white ice on top of black soil. White ice on top of black soil - how do you figure that? -------------------- |
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