Hansteen Mons: An LROC geological perspective

•Mons Hansteen (MH) is a Lunar volcanic complex composed of three geologic units.•It was emplaced in three phases over ∼ 240 million years with oldest unit at 3.74Ga and the youngest units at ∼ 3.5Ga, at about the same time as the surrounding mare.•It is mantled by a ∼ 9–11m layer of pyroclastic material from the numerous vents.•The close spacing of the vents in the Pitted unit may represent a new style of volcanism.