On the Road Again - volume 5 - Page 29

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Serpens


Posts: 169

Reply: 561



PostPosted: March 24, 2010 5:30 PM 

Actually this looks like a harder layer (upper surface) displaced during the impact. I'm positionally challenged but assuming from Hortonheardawho's comment that this is near Concepcion this would be displaced ejecta. The layer could well have parted during the displacement event, the effects of shock are really complex and the most unexpected results can occur. Or as $.02 worth says, the underlying layers could have been reduced to dust - possibly having been badly fractured during the disruption.

And can't we now lose the inference that models for Meridiani are somehow wrong due to the amount of erosion over a few thousand years. Even JPL no longer espouse their initial shoot from the hip statement of a thousand year old crater.

Barsoomer


Posts: 344

Reply: 562



PostPosted: March 24, 2010 6:29 PM 

> Even JPL no longer espouse their initial shoot from the hip statement of a thousand year old crater.

But they still say tens of thousands of years and "definitely less than 100,000 years." And the MER scientists' *upper-bound* estimate for the amount of erosion at Meridiani in 100,000 years is 1 millimeter. So there is still some discrepancy that cannot just be glossed over.

hortonheardawho


Posts: 3465

Reply: 563



PostPosted: March 29, 2010 1:18 PM 

Here is a set of 57 saturated false color images of rocks around Concepcion crater. Some I have posted before but most are new images.

The most puzzling to me are the fragments that seem to be coated on all visible sides like this one:

I don't understand how all of the sides of a fragmented rock could be "fracture fill".

Barsoomer


Posts: 344

Reply: 564



PostPosted: March 29, 2010 4:28 PM 

Horton, that crumbly rock that is visible in #5 and #8 of your image set has some interesting structure in the crumbled part on the right. Is there a stereo of that? I think #5 and #8 were in any case taken from different positions. If I put them together I can get some kind of stereo effect that shows the tangled mess at the right a little more clearly.

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