Geologic map of the Petavius quadrangle of the Moon

The large crater Petavius, about 180 km in diameter, is the dominant geologic feature within this quadrangle at the southeast border of Mare Fecunditatis on the east limb of the near side. Four categories of materials have been distinguished herein: (1) terrae, with rugged to gently rolling topography and moderate albedo; (2) plains, of low relief and moderate albedo; (3) craters, with low to rugged relief and low to high albedo; (4) maria, with essentially no relief and very low to moderately low albedo. Materials are places in chronologic sequence according to stratigraphic position and(or) physical characteristics believed indicative of relative age. Development of the lunar time-stratigraphic nomenclature has been summarized by Wilhelms (1970).