Over 1 million years ago a volcano near Santa Fe erupted, and the core collapsed creating a huge caldera. This was a super volcano and the caldera is huge! Up to about 50,000 years ago there were magma ‘leaks’ that caused several dome-shaped hills within the caldera, separating the caldera into several areas. The caldera … Continue reading Valles Caldera – a supervolcano that exploded 1 million years ago!