The Kari-Kari dome and Kumurana plutons were formed between 23,000,000 and 21,000,000 years ago. The Agua Dulce volcanics are of similar ages as the Kari-Kari dome, as is the Canteria ignimbrite. A weighed age estimate for the Agua Dulce, Kari-Kari, Kumurana and Canteria formations is 21,400,000 ± 400,000 years ago. Older ages of 42,510,000 to 45,480,000 are found in dykes and may reflect the age at which the pluton was emplaced. The Cerro Rico intrusion is 7,000,000 years younger than the main Kari-Kari caldera.