Wikipedia
Chaxas (volcano)
Chaxas is a lava dome complex which has been the source of the 1.09±0.56 mya Chaxas ignimbrite in the Andes. The ignimbrite dips away from the domes and are partially younger than the Puripicar ignimbrite. The dome has a diametre of and fills the vent area of the ignimbrite. Licancabur volcano is constructed on top of this ignimbrite. Some Inka ceramics are derived from the clay in this ignimbrite.