Back At Larry's Lookout |
Back At Larry's Lookout |
Guest_Sunspot_* |
May 18 2005, 06:29 PM
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#1
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Guests |
Some pretty complex driving by the look of it:
http://qt.exploratorium.edu/mars/spirit/fo...E0P1214R0M1.JPG Now this is odd: http://qt.exploratorium.edu/mars/spirit/na...E0P0617R0M1.JPG It looks like some of the rocks have slid down the dune |
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May 25 2005, 11:04 AM
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#2
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
Good mosaic.
I've see something like this locally. If a mine has pyritic material in the overburden, this material weathers into iron, sulfate (salts) and acid. This mineralized water saturates loose sand or porous sandstone, evaporates and leaves behind what is called a "sulfate bloom" on the surface. Of added interest is the bright, overexposed "CCD bleed" in the top row of MI images used in the mosaic. This suggests to me a fresh, reflective crystal face (well, "object"; crystal has a new-age loaded meaning) on the surface. --Bill -------------------- |
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