Valles Caldera (or Jemez Caldera), is a 19 km wide volcanic caldera in the Jemez Mountains of northern New Mexico. Valles Caldera is one of the smaller volcanoes in the supervolcano class. The circular topographic rim of the caldera measures 19 kilometres in diameter. The El Cajete Pumice, Battleship Rock Ignimbrite, Banco Bonito Rhyolite, and the VC-1 Rhyolite were emplaced during the youngest eruption of Valles caldera, about 50,00060,000 years ago. Read more