The San Juan volcanic field is part of the San Juan Mountains in southwestern Colorado. It consists mainly of volcanic rocks that form the largest remnant...

the San Juan volcanic field. One, La Garita Caldera, is 35 miles (56 km) in diameter. Large beds of lava, some extending under the floor of the San Luis...

Francisco volcanic field, Arizona San Juan volcanic field, Colorado Taos Plateau volcanic field, Taos County, New Mexico Trans-Pecos Volcanic Field, Texas...

In a volcanic eruption, lava, volcanic bombs, ash, and various gases are expelled from a volcanic vent and fissure. While many eruptions only pose dangers...

Caldera is a large caldera and extinct supervolcano in the San Juan volcanic field in the San Juan Mountains around the town of Creede in southwestern Colorado...

during the Neoarchean era about 2.7 billion years ago. In the San Juan volcanic field, ore veins were emplaced in fractures associated with several calderas...

Coso Volcanic Field, Mono Lake Volcanic Field, Marysvale Volcanic Field, San Juan volcanic field, Indian Peak, Central Colorado volcanic field, Jemez...

units are volcanic in origin, sourced from the San Juan Volcanic Field, and contain conglomerates and andesite clasts. The Eocene-aged San Jose Formation...

-105.5544 The Thirtynine Mile volcanic area, part of the larger Central Colorado volcanic field, is an extinct volcanic area located in Park and Teller...

of Nelson Mountain tuff, solidified ash from a volcano in the San Juan volcanic field that erupted about 27 million years ago. An overlook area with...