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Thread: Rounded Boulders on Mars

  1. #1
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    Rounded Boulders on Mars

    In recent days, Spirit has photogrophed numerous rounded boulders. These are the first I have seen in Spirit's travels. Is Spirit on a wave cut bench and these are old shoreline boulders or are they ancient boulders being exhumed from older rocks?
    Jack

  2. #2
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    Quote Originally Posted by astromark
    Worthy of mention also is volcanic ejection often forms round rocks.
    These rocks, at least the ones pictured above, look to be layered and rounded, as if they were once larger parts of sedimentary bedrock that was broken up and the pieces then heavily eroded. Further images should be interesting.
    Last edited by 01101001; 2005-Dec-15 at 03:13 AM.
    0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 ...
    Skepticism enables us to distinguish fancy from fact, to test our speculations. --Carl Sagan

  3. #3
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    I don't know. Here's an example, though:

    From Spirit :: Panoramic Camera :: Sol 691:

    0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 ...
    Skepticism enables us to distinguish fancy from fact, to test our speculations. --Carl Sagan

  4. #4
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    Bench--- did you say beach?
    Yes, they do give that impression. Worthy of mention also is volcanic ejection often forms round rocks.

  5. #5
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    Nov 2005
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    Those rocks do look interesting, Looking closly they do show signs of segregated errosion. As if a water flow decreased its depth and erroded the rock unevenly . Yet I wonder if the phenomenon could be explained by sand erosion.

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