The summit contains a wide summit crater which itself contains two smaller craters, one is wide and lies on the northeastern side and the other with a width of is in the centre of the summit crater. Lava flows/lava domes are emplaced in the southern part of the main summit crater. Additional adventive vents occur on the slopes of Putana; a particularly noticeable fan-shaped flow northwest of Putana originated in such a flank vent.