Surveyor views landing site for now-nixed 2001 probe Spaceflight Now

The Libya Montes are a ring of mountains up-lifted by the giant impact that created the Isidis basin to the north. During 1999, this region became one of the top two that were being considered for the now-canceled Mars Surveyor 2001 lander. The Isidis basin is very, very ancient. Thus, the mountains that form its rims would contain some of the oldest rocks available at the martian surface, and a landing in this region might potentially provide information about conditions on early Mars.