I recall seeing photos of what appeared as blown down trees on Mars that were petrified.
I recall seeing photos of what appeared as blown down trees on Mars that were petrified.
Mars is a really odd environment. The atmosphere is near the triple point of Carbon Dioxide in Winter, but also Spring and Fall, so it can often go from hard compact frozen "Dry Ice", break off, slide or roll and expose unoxidized ground below which cause what looks like dark flows. I'm still convinced there are real water flows as well, but when temps exclude water, Carbon Dioxide in the form of some kind of "Dry Ice" is a logical actor.
http://www.space.com/7775-strange-ma...-illusion.html
http://apod.nasa.gov/apod/image/1211...s_mro_2560.jpg
http://hirise-pds.lpl.arizona.edu/PD...ED.abrowse.jpg
Last edited by majicbar; 06-23-2013 at 07:14 AM.