posted on Aug, 5 2010 @ 11:17 AM
That looks like a volcano..... I am looking up what it is called, but there is a giant dead volcano on the surface of mars.
edit: olympus mons is what it is called.
There are other volcano's as well. They volcano's get huge due to low gravity and lookd like bull eye's because there are no tectonic plates and
the volcano erupts over the same exact location over millions of years. This is unlike earth. I would like to see an off-center picture of this.
[edit on 5-8-2010 by DINSTAAR]