Clearly this part of Mars was wet for quite some time, sometime in the past.

That appears to have been more than 3 billion years ago (perhaps closer to 4), and does not need to have been particularly warm, nor much more than damp.

However, this is wet enough for interesting things to occur, and it probably lasted for millions of years.

I'll have to spend a while thinking about this, but as I said previously, we're learning more about Mars from this one crater than from every lander to date.

I'll be at LPSC and get the chance to hear things from the horse's mouth, get some of the less-well formed ideas, and see if I can build a new model of Mars that fits all the data, without any unnecesary preconceptions - which is where I started a few years back.

Just seems I have to start over...