posted on Jan, 23 2004 @ 05:23 PM
Well, though I'm not sure how an indentation of that shape could occour, the rock being inside of it could have happened simply through the winds on
Mars, which can get pretty fast. If it was blowing a small pebble that pebble could have rolled over that rock and fell into the hole.
And an idea of how the hole was formed has just come to me!
(Yeah, but now my brain hurts....) It may have been cracked durring a storm when
another rock slammed into it, and the crack kept expanding through erosion from all of the dust and wind.