Opportunity Route Map |
Opportunity Route Map |
Feb 11 2005, 08:11 AM
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The Insider Group: Members Posts: 669 Joined: 3-May 04 Member No.: 73 |
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Aug 28 2005, 05:21 AM
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Senior Member Group: Members Posts: 2228 Joined: 1-December 04 From: Marble Falls, Texas, USA Member No.: 116 |
Actually, the geometry of those larger fractures is probably pretty close to 90 degrees, but that is not a good reason to ascribe them to some kind of artificial construction. Systems of 90 degree fracturing are really very common in natural rocks and are usually caused by external stresses. The finer fractures with a non-rectilinear, polygonal geometry really do resemble dessication cracks, but I think they can form other ways as well. Before I'd be convinced of a dessication origin, I'd really like to see some MIs of some where they were filled with rock and not wind blown sediment.
Those "coxcomb" structures pointed out by tty resemble the Razorback structures seen in Endurance. To me, they look like the vertical parts of the rinds they are observing on some of these fractured blocks. I find _that_ intriguing. -------------------- ...Tom
I'm not a Space Fan, I'm a Space Exploration Enthusiast. |
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