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The La Garita Caldera is one of a number of calderas that formed during a massive ignimbrite flare-up in Colorado, Utah, and Nevada from 40 to 18 million years ago, and was the site of massive eruptions about 28.01 ± 0.04 million years ago, during the Oligocene Epoch.
The La Garita Mountains extend from near the town of Creede east and northeast over 30 miles (48 km) toward the San Luis Valley. The range is marked by a circuitous ridge with the westernnmost peak being Phoenix Peak (elevation 13,895 feet (4,235 m)) near the Continental Divide and the easternmost peak being Lookout Mountain (elevation 11,516 ...
Wheeler Geologic Area Location within Colorado. 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 ...
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.
Colorado. Name Elevation Location Last eruption meters feet Coordinates; Dotsero: 2,230: 7,316 2200 BC ± 300 years La Garita Caldera ... La Garita Caldera: 4,274: 14,022
One, La Garita Caldera, is 35 miles (56 km) in diameter. Large beds of lava, some extending under the floor of the San Luis Valley, are characteristic of the eastern slope of the San Juans. 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
La Garita Caldera—Fish Canyon Tuff: 27.8 San Juan volcanic field, Colorado 5,000 Part of at least 20 large caldera-forming eruptions in the San Juan volcanic field and surrounding area that formed around 26 to 35 Ma. [19] [20] Lund Tuff 29.2 Indian Peak-Caliente Caldera Complex 4,400
La Garita Caldera erupts in the Wheeler Geologic Area, Central Colorado volcanic field, Colorado, USA, eruption several VEI 8 events (Possibly as high as a VEI 9), 5,000 cubic kilometers (1,200 cu mi) of Fish Canyon Tuff was blasted out in a single, major eruption about 27.8 million years ago. [52] [86] [87]