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Revised ages for tuffs of the Yellowstone Plateau volcanic field; assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event

Marvin A. Lanphere, Duane E. Champion, Robert L. Christiansen, Glen A. Izett and John D. Obradovich
Revised ages for tuffs of the Yellowstone Plateau volcanic field; assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event
Geological Society of America Bulletin (May 2002) 114 (5): 559-568

Abstract

(super 40) Ar/ (super 39) Ar 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 + or - 0.004 Ma; Mesa Falls Tuff--1.285 + or - 0.004 Ma; and Lava Creek Tuff--0.639 + or - 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 Reunion Island, supporting other evidence for a normal-polarity event younger than the Reunion event.


ISSN: 0016-7606
EISSN: 1943-2674
Coden: BUGMAF
Serial Title: Geological Society of America Bulletin
Serial Volume: 114
Serial Issue: 5
Title: Revised ages for tuffs of the Yellowstone Plateau volcanic field; assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event
Affiliation: U. S. Geological Survey, Menlo Park, CA, United States
Pages: 559-568
Published: 200205
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 51
Accession Number: 2002-035487
Categories: Quaternary geologyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch map
N43°15'00" - N45°10'00", W112°10'00" - W110°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200212
Program Name: USGSOPNon-USGS publications with USGS authors
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