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How far from California has Bishop Tuff ash been found?
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Quaternary
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the Quaternary Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The Bishop Tuff, which erupted from the Long Valley Caldera in California approximately 740,000 years ago, serves as a significant marker horizon in Quaternary geochronology. This volcanic ash has been identified in Pleistocene sediments as far away as eastern Nebraska.2