Space/Science » in reply to Thoughts on The Opportunity Rocks...

'bout the polygonal cracks I noticed...

jms — 2/24/2004 5:51:25 PM (archived)

I've been thinking 'bout the polygonal cracks I noticed on other parts of the outcrop near Charlie Station. In an earlier post I speculated that they could be the tops of columnar joints, but there are structures of similar morphology that supports Nick's model:

The following pictures are from:

Bedforms in cohesive sediments

...ancient dessication cracks in permian strata of northwest China...

.."these modern mudcracks occured..."

Do go visit the article, it is very interesting

If the view of the elongated pits from the Opportunity outcrop are on the bedding plane...this absolutely supports Nick's Model. Cool. Does anyone know exactly what part of El Capitan these pictures of the elongated pits are from? Are they from the top of the block right in front of the rover?

Arm waving as usual.....

Oh, here's the unreal color image I posted: Look at the lines I emphized at #3.

One of the original raw images is here.

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The whole thread (32 posts)

• Thoughts on The Opportunity Rocks... - Nick Hoffman - 2/24/2004 11:49:58 AM
  • re: no drape, no forceful displacement - E.P. Grondine - 6/26/2005 5:31:04 PM
  • re:thoughts on your thoughts (hematite, regional implications) - dtb - 2/25/2004 3:31:36 AM
    • re: re:thoughts on thoughts on thoughts - jms - 2/25/2004 5:14:00 AM
      • lag deposit and erosion - Nick Hoffman - 2/25/2004 11:23:15 AM
      • re:link to paper, more thoughts, another mtn cam - dtb - 2/25/2004 6:01:52 AM
        • Mt. St. Helen's volcanocam alive and well... - Tom Brosz - 6/26/2005 9:38:17 PM
        • Mt. Hood webcam - Bowser - 2/25/2004 2:30:44 PM
          • Here. - Bowser - 2/25/2004 2:32:24 PM
            • re:active mountains - dtb - 2/25/2004 3:48:17 PM
              • Rockies still rocking.. - jms - 2/25/2004 6:25:37 PM
                • Rocks - Bowser - 2/25/2004 9:33:55 PM
                  • re: Rocks - Luis Cuadro Moreno - 6/26/2005 3:16:20 AM
        • ...as a sometimes desert rat I get tired of geology covered by all that biomass... (n/t) - jms - 2/25/2004 6:26:39 AM
  • Thanks - ebnelson - 2/25/2004 12:29:50 AM
  • re: Further... - BRFelix - 2/24/2004 8:44:52 PM
    • re: Oh Lord, stuck in sabkha again... - BRFelix - 2/24/2004 8:51:37 PM
  • re: Opportunity Rocks !!! lol (n/t) - Success_Machine - 2/24/2004 8:23:44 PM
  • 'bout the polygonal cracks I noticed... - jms - 2/24/2004 5:51:25 PM
  • Could there be "liquid" water underneath? - Gary - 2/24/2004 5:05:33 PM
    • Global dust storms diffuse various material across the entire planet (n/t) - Buck Galaxy - 2/24/2004 7:04:42 PM
    • the outcrop could be billions of years old... - jms - 2/24/2004 6:23:54 PM
      • re: the outcrop could be billions of years old... - Chris Vancil - 2/24/2004 8:37:14 PM
  • That was very much appreciated- Thanks... - r.l. - 2/24/2004 4:12:32 PM
    • re: That was very much appreciated- Thanks... - Chris Vancil - 2/24/2004 8:50:31 PM
    • Pearls? - RobVG - 2/24/2004 5:59:06 PM
      • The term is "amygdale" - jms - 2/24/2004 7:49:45 PM
        • re: Would this - BRFelix - 2/24/2004 8:57:54 PM
  • re: Thoughts on The Opportunity Rocks... - Robert Clark - 2/24/2004 4:07:09 PM
  • excellent, as always. - jms - 2/24/2004 3:38:15 PM
  • I told you so... - Donald - 2/24/2004 2:54:05 PM
  • re: Wow - BRFelix - 2/24/2004 2:35:52 PM