New Mexico, USA
35.87 N, 106.57 W
summit elevation 3430 m
Caldera
The volcano contains a 22 km wide caldera which was formed 1.7 million years ago. Post caldera eruptions formed Redondo Peak dome.
The last eruptions were 50,000-60,000 years ago, but an active geothermal system is currently present with hot springs and fumaroles.
50,000-60,000 years ago