Volcanic activity in the region during the
Eocene had formed the Icanche
Formation, about 45 million years ago. After a pause of about 33 million years, volcanic activity resumed during the
Miocene and continues to the present day. The volcanism included the Uijna and Carcote
ignimbrites and the
stratovolcanoes on the border between
Chile and
Bolivia.[2]
Together with
Irruputuncu and del Inca and Poruñita it is considered to be a young volcano.[3]Lava flows and
craters are no longer recognizable but the volcano maintains a conical shape.[4] Other volcanoes in the area are
El Rojo Sur[5] and
Olca-Paruma.[6] Pabellón de Inca is not active.[1]