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La Garita 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, United States. [1] It is west of La Garita, Colorado .
One of the largest of these volcanoes was the La Garita Caldera, which is located on the western extent of the La Garita Mountains. It was active 27.8 million years ago, and within this caldera, later eruptions (27.3 million years ago) produced the Bachelor Caldera.
La Garita Caldera (100 km × 35 km (62 mi × 22 mi)), Wheeler Geologic Area, San Juan volcanic field, Colorado; VEI 8; more than 5,000 km 3 (1,200 cu mi) of Fish Canyon Tuff was blasted out in a major single eruption about 27.8 Ma.
The Wheeler Geologic Area is a highly eroded outcropping of layers of volcanic ash, located in the San Juan Mountains in southern Colorado, United States. [1] It is about 10 miles east north-east of Creede. The ash is the result of eruptions from the La Garita Caldera approximately 25 million years ago. [2]
It consists mainly of volcanic rocks that form the largest remnant of a major composite volcanic field that covered most of the southern Rocky Mountains in the Middle Tertiary geologic time. [1] There are approximately fifteen calderas known in the San Juan Volcanic Fields; however, it is possible that there are two or even three more in the ...
The eruption of the La Garita Caldera shaped the San Juan Mountains by completely obliterating the volcanoes that once stood in the area. [1] Tourism. Tourism is a major part of the regional economy, with the narrow gauge railway between Durango and Silverton being an attraction mostly in the summer and fall.
The Fish Canyon Tuff is the large volcanic ash flow or ignimbrite deposit resulting from one of the largest known explosive eruptions on Earth, estimated at 1,200 cu mi (5,000 km 3). [ 1 ] (see List of largest volcanic eruptions ).
La Garita Caldera: San Juan volcanic field: Colorado, United States Fish Canyon eruption: 27,800,000 5,000 km 3 [29] [30] Grey's Landing Supereruption Yellowstone hotspot: United States Deposited the Grey's Landing Ignimbrite 8,720,000 2,800 km 3 [31] La Pacana: Andes Central Volcanic Zone: Chile Responsible for the Antana Ignimbrite 4,000,000 ...