Map showing Iru Phutunqu on the border of Bolivia and Chile south west of the Uyuni salt flat
Iru Phutunqu (Aymara iru spiny Peruvian feather grass, phutunqu a small vessel or a hole, pit, crater, hispanicized spellings Iru Putuncu, Irruputuncu, Iruputuncu) is a stratovolcano which lies on the border of Chile and Bolivia. On the Chilean side it is situated in the Tarapacá Region. On the Bolivian side it is located in the Potosí Department, Nor Lípez Province, Quemes Municipality, south east of the Uyuni salt flat.
It is a relatively small peak, lying within the collapse scarp of a debris avalanche from earlier in the Holocene, which was built up by eruptions to fill much of that feature. There are two craters lying at the summit, with the one to the south displaying fumaroles. In 1995 the peak's first eruption in recorded history occurred in the form of a phreatic eruption.
See also