Public domain
Cratered Summit of a Knob
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
There are many knob formations is the southeastern Acidalia region of Mars. All show a hilltop crest except one which has a summit crater that resembles a cone volcano in this image captured by NASA Mars Reconnaissance Orbiter.
NASA Image and Video Library’s own descriptionCredit lineCratered Summit of a Knob. NASA/JPL, 2015-01-15. Public domain. ID: PIA19131.
