Bandelier Tuff
A geologic formation in New Mexico / From Wikipedia, the free encyclopedia
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The Bandelier Tuff is a geologic formation exposed in and around the Jemez Mountains of northern New Mexico. It has a radiometric age of 1.85 to 1.25 million years, corresponding to the Pleistocene epoch. The tuff was erupted in a series of at least three caldera eruptions in the central Jemez Mountains.
Quick Facts Type, Unit of ...
Bandelier Tuff | |
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Stratigraphic range: Pleistocene, 1.85–1.256 Ma | |
Type | Geologic formation |
Unit of | Tewa Group |
Sub-units | La Cueva Member, Otowi Member, Tshirege Member |
Overlies | Tschicoma Formation, Paliza Canyon Formation |
Thickness | 330 m (1,080 ft) |
Lithology | |
Primary | Ignimbrite |
Other | Pumice |
Location | |
Coordinates | 35.764°N 106.322°W / 35.764; -106.322 |
Region | New Mexico |
Country | United States |
Type section | |
Named for | Bandelier National Monument |
Named by | Harold T.U. Smith |
Year defined | 1938 |
Map of Bandelier Tuff exposures |
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The Bandelier Tuff was one of the first ignimbrites recognized in the geologic record, and has been extensively studied by geologists seeking to understand the processes involved in volcanic supereruptions.