post 93 and 105 show the extreme angle of this cliff face. I hadn't realized the angle was so high. Those mysterious dark sandy stripes actually might be simple dry flow from the cracks above, that makes a lot of sense, seeing how high the angle of the cliff is.
And, as far as horton's images go, I download and save all of them as he posts them. If you have been paying attention all along you chould have all the good ones. I think my collection of the high quality horticolor images is close to complete.
PS, Horton, you should compile a book out of these images. The raw data is in the public domain, so you own the copyright on the images you make. The main stream press has lost interest in this, so I think the public has been missing out on some of the really spectacular recent images .
A recent favorite of mine, actually from the NASA color pan but I adjusted the colors to get rid of the NASA trademark red sky:
http://www.web-a-photo.com/showpic.exe?ID=591903&invite=47d344a4a8fbcfa0edb3c3940ada5149
I think the big image is a couple of MB, so be warned.