 Paniri is the sacred mountain for the village of Ayquina, and was also used as a source of dacitic rocks.The first units erupted by Paniri are the mainly lavic (plus one pyroclastic deposit) Malku unit which crops out in the northwestern sector of the volcano and the Los Gordos unit.The Los Gordos unit consists of pyroclastics and brecciated lava flows which are much thicker than these of the Malku unit; they crop out north and northwest of Paniri and one date obtained from this unit is 1.39 ± 0.28 million years ago.