Geochronology
Geochronology
GChron
Articles | Volume 7, issue 1
Articles | Volume 7, issue 1
https://doi.org/10.5194/gchron-7-35-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-7-35-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 7, issue 1
Research article
 | 
24 Feb 2025
Research article |  | 24 Feb 2025

Emplacement age of the Sevier gravity slide, Utah, USA

Tiffany Rivera, McKenna Holliday, Brian Jicha, David H. Malone, Michael J. Braunagel, V. Alex Bonilla Franco, Robert F. Biek, W. Ashley Griffith, and David B. Hacker

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Latest update: 27 Oct 2025
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Short summary
The timing of an ancient gravity slide that originated in the Marysvale volcanic field (Utah) is constrained using 40Ar/39Ar dating of pseudotachylyte, a friction-induced glass that is generated during slide movement, and the volcanic tuffs that were displaced by the slide and those that overly the slide mass. Our results suggest that the Sevier gravity slide occurred at 25.25 Ma. The removal of such a large volume of material likely allowed for the eruption of the Antimony Tuff at 25.19 Ma. 
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