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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 ...
The La Garita Wilderness is a U.S. Wilderness Area located in the La Garita Mountains of southern Colorado. The 129,626-acre (524.58 km 2 ) wilderness established in 1964 in Gunnison and Rio Grande National Forests includes segments of the Colorado Trail and the Continental Divide Trail .
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]
Mining History. The Summitville mine was the scene of a major environmental disaster in the 1990s when the liner of a cyanide-laced tailing pond began leaking heavily. Summitville is in the Summitville caldera, one of many extinct volcanoes making up the San Juan volcanic field. One, La Garita Caldera, is 35 miles (56 km
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 ...
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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).