Very interesting column like formations in Mars rocky Mountains !

A picture taken with the Curiosity Rovers extra zoom enhancement tool of far away mountains of Mars. In the cliff like stone walls of those mountains there can be seen some very interestin column like structures craved into the stone, much like The Petra Castles on Earth, Jordan.

What do you guys think ?

Picture Name : MSL4185 CC
Credits to : Nasa, Jpl, Neville Thompson