horton- The RAD idea for the duplicate images was just a quick thought before work. My mars time is very limited so I haven’t had much time to experiment but noticed very quickly things were amiss (or amess if you like). I figured if anybody was at home comparing images it would be you. I have sent an e-mail to the Phoenix team concerning the duplicates. We’ll see if I get a response I guess. How in Ares do they get a Viking image into the mix. Mind Boggling. I sure am glad you are on our team (the public). Thanks for the PDS Reader plug in and your continued devotion to Mars exploration and this forum.
Concerning the white stuff. Sulfate and Gypsum dunes North of Phoenix have been imaged with CRISM link . I wonder just how far these deposits run? If these are found at the dune crests, couldn’t this be an ongoing process in relation to seasonal ice/water/gas cycle? Could we possibly find gypsum or some other hydrous sulfate at the top of the polygon set aside for later study? I have yet to find the CRISM imprint for the Phoenix area (if one exists yet) but it is on the to do list (the big one).
dx- Gypsum is a hydrous calcium sulfate. Milk is a good source of calcium and helps build strong bones. Milk comes from mammals. Therefore the Northern hemisphere of Mars was once (and may still be) inhabited with humans. It is really that easy…
