Wheelwright caldera

26°45′00″S 68°37′30″W / 26.75000°S 68.62500°W / -26.75000; -68.62500^[1] Wheelwright caldera is a caldera in Chile. It is variously described as being between 11 kilometres (6.8 mi) and 22 kilometres (14 mi) wide and lies in the Central Volcanic Zone of the Andes. A lake lies within the caldera, which is among the largest of the Central Andes. The caldera lies in the region of Ojos del Salado, the world's tallest volcano.

The caldera formed together with a major ignimbrite known as the Wheelwright ignimbrite, but the exact relationship between the two is not clear as the ignimbrite is not encountered within the caldera. The ignimbrite was emplaced around 6.6 ± 1.2 - 5.5 ± 0.8 million years ago. Later, a number of volcanoes such as Ermitaño and Peñas Blancas were constructed on the ring fault around the caldera, and lava domes developed within its confines.