A humble bow in your virtual direction. Owe ya a beer. Sorry I've not gotten to it sooner. My apologies.

However, I think that we are both right, NASA suggested that both water and wind bedforms are present. I'm not an expert at cross-beds and sedimentary structures, as I've said before, but I know them when I see them.

Perhaps I should further explain "Arm-waving" . When I sit on an outcrop with fellow geologists or students we do alot of brainstorming. As ideas and evidence make themselves known, as various experts throw their opinions, models take shape. No one story from one individual is perfect. And yes, I do 180's theory-wise. Sometimes 270's, 360's 740's.... the next outcrop could change all of our assumptions. I'll flip with the facts and try not to bend the facts to the model. Thanks for reminding me.

I'll also admit to having had a reluctance to watery Mars models, that's not good for a scientist.

As to an earlier post about no macro-fossils in evaporites, turns out it does happen. I'm wrong there too.

About polygons, they may just be tectonic jointing, but I was hiking on some Permian mudflats the other day and saw some structures quite similar.

I do notice and read your posts, we've had some good discussions. And there has not been more than a peep about my ranting about sulfates, jarosite, cross-beds, ripples, concretions, evaporites, Bromine... I think we all, and more so Nick, deserve a pat on the back, for we were all pursuing ideas along the lines of the big guys! An example of exoteric science.

Thanks all for keeping me thinking.