The Fish Canyon Tuff is the large volcanic ash flow deposit resulting from one of the largest known explosive eruptions on Earth, estimated at 1,200 cu mi . The eruption was centered at La Garita Caldera in southwest Colorado. The tuff can be assumed to belong to one eruption due to its high chemical consistency , matrix 75–76% and consistent phenocryst content and composition . This tuff and eruption is part of the larger San Juan volcanic field and Mid-Tertiary ignimbrite flare-up.
Source: Wikipedia.org
Copyright: Creative Commons 3.0
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