HiRISE: Cratered summit of a knob

ESP_038877_2135There are many knob formations in the southeastern Acidalia region of Mars. All show a hilltop crest except one which has a summit crater that resembles a cone volcano. Knobs like these likely formed from interactions between water ice and lava… [More at link]

This entry was posted in Reports and tagged , , , , , , , , . Bookmark the permalink.

Comments are closed.