Columnar Jointing
Lava flows sometimes cool to form large groups of more-or-less equally sized columns. The resolution of the HiRISE images is such that the columns were found in various locations in 2009.
-
Columnar jointing in a crater in Marte Vallis.
-
Columnar jointing on the Earth.
-
Columnar jointing on the Earth.
-
Columnar Jointing in Yellowstone National Park.
Read more about this topic: Amazonis Quadrangle