Some of the observed features included ancient river beds, craters, massive extinct volcanoes, canyons, layered polar deposits, evidence of wind-driven deposition and erosion of sediments, weather fronts, ice clouds, localized dust storms, morning fogs and more.
(Some of the observed features; included; ancient river beds, craters, massive extinct volcanoes, canyons)
Some of the observed features
included
ancient river beds, craters, massive extinct volcanoes, canyons