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La Garita is considered an extinct volcano. La Garita is also the source of at least seven major eruptions of welded tuff deposits over a span of 1.5 million years since the Fish Canyon Tuff eruption. The caldera is also known to have extensive outcrops of a very unusual lava-like rock unit, called the Pagosa Peak Dacite, made of dacite that is ...
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]
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.
Indian Peak–Caliente Caldera Complex Utah, United States The largest of the Indian Peak-Caliente Caldera Complex eruptions, preserved as the Wah Wah Springs Tuff; includes pyroclastic flows more than 500 meters (1,600 ft) thick 30,600,000 5,500–5,900 km 3 [27] [28] La Garita Caldera: San Juan volcanic field: Colorado, United States
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
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]
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 (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.