Revised ages for tuffs of the Yellowstone Plateau volcanic field: Assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event
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Abstract
40Ar/39Ar ages were determined on the three major ash-flow tuffs of the Yellowstone Plateau volcanic field in the region of Yellowstone National Park in order to improve the precision of previously determined ages. Total-fusion and incremental- heating ages of sanidine yielded the following mean ages: Huckleberry Ridge Tuff—2.059 ± 0.004 Ma; Mesa Falls Tuff— 1.285 ± 0.004 Ma; and Lava Creek Tuff— 0.639 ± 0.002 Ma. The Huckleberry Ridge Tuff has a transitional magnetic direction and has previously been related to the Reunion Normal- Polarity Subchron. Dating of the Reunion event has been reviewed and its ages have been normalized to a common value for mineral standards. The age of the Huckleberry Ridge Tuff is significantly younger than lava flows of the Reunion event on Ré union Island, supporting other evidence for a normal-polarity event younger than the Reunion event.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Revised ages for tuffs of the Yellowstone Plateau volcanic field: Assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event |
| Series title | Geological Society of America Bulletin |
| DOI | 10.1130/0016-7606(2002)114<0559:RAFTOT>2.0.CO;2 |
| Volume | 114 |
| Issue | 5 |
| Year Published | 2002 |
| Language | English |
| Publisher | GeoScienceWorld |
| Contributing office(s) | Volcano Science Center |
| Description | 10 p. |
| First page | 559 |
| Last page | 568 |
| Country | United States |
| State | Idaho, Montana, Wyoming |
| Other Geospatial | Yellowstone National Park |
| Google Analytic Metrics | Metrics page |