Re: All good choices. My Favourite is Gale Crater mound
"on Fri 09 of July, 2010 20:12 PDT, by Nick H
That mound actually rises higher than the crater rim, which is a bit odd. I like odd, it means there's something we haven't understood yet. I personally see this mound as a giant hydrothermal system - an aqueous volcano with lots of dissolved minerals, emerging at the surface in a series of geysers and crystallising layer after layer of dissolved material."
So, you think that Gale Crater died before if errupted? Odd is right. I like odd too, for it is an archeological feature.
Check mate? Maybe?
Cheers, Nick.