A collection of giant calderas ("super volcanoes") from the beginning of New Mexico's "Age of Volcanoes".
Rhyolite, quartz latite
These are older volcanoes and volcanic rocks dating from the Neogene. They represent part of the great ignimbrite flare-up that occurred throughout the Southwest at this time. Many of these eruptions resulted in large calderas similar to the modern Vallis Caldera. However, 20 to 35 million years of erosion and faulting have erased most of the morphology of large calderas. Today this area is dominated by massive cliffs of ash flow tuffs and exposures of shallow batholiths consisting of granitic and intermediate volcanic rocks.
Below is a map showing the principal super volcanoes (large calderas) in relation to modern relief in southwestern New Mexico. Note that the Gila Wilderness is probably a wilderness because the underlying geology is so "wild."
-Concept: a Valles Caldera chopped up by Basin and Range like faulting
View Datl-Mogollon Volcanic Field in a larger map
All text and photo L. Crumpler, New Mexico Museum of Natural History and Science
New Mexico Volcano Directory
A map of volcanoes and volcanic features around the state, with detailed discussion of each site.
Volcanoes of New Mexico
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