Although no samples were returned to Earth from either of the Viking Lander sites, several rocks at the Viking Lander 2 site at Utopia Planitia (48°N, 226°W) appear to be volcanic in origin because of their deeply pitted surfaces. How these rocks actually came to be scattered across the surface is still a question for debate, since they may be the products of nearby volcanic activity or by the transport of impact ejecta over larger distances. In this view, the footpad of the lander is seen at bottom right. The rock just at the top of the footpad is approximately 35 centimeters across.
Viking Lander 22A001.