Quote:
Originally Posted by Vars191
It is not a crater but a depression, it was not caused by a high speed collision but by a slow impression of an unknown, that is the only thing that would cause this type of impression and it looks like it had water in it at some time
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Sorry, mate...it's a crater. That flow deposit you see in the bottom of the crater is caused by slumping. There's transverse dunes superimposed on top of the slump mounds.
There's an ejecta blanket surrounding the entire area of the impact...that's what Opportunity was driving over the top of. There's shocked quartz grains all over the place.
There are sinkholes on Mars, but I'm afraid that's not one of them.