Major- and trace-element characterization, expanded distribution, and a new chronology for the latest Pleistocene Glacier Peak tephras in western North America
Quaternary Research
By: S.C. Kuehn, D.G. Froese, P. E. Carrara, F.F. Foit Jr., N.J.G. Pearce, and P. Rotheisler
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Abstract
The Glacier Peak tephra beds are among the most widespread and arguably some of the most important late Pleistocene chronostratigraphic markers in western North America. These beds represent a series of closely-spaced Plinian and sub-Plinian eruptions from Glacier Peak, Washington. The two most widespread beds, Glacier Peak 'G' and 'B', are reliably distinguished by their glass major and trace element abundances. These beds are also more broadly distributed than previously considered, covering at least 550,000 and 260,000??km2, respectively. A third bed, the Irvine bed, known only from southern Alberta, is similar in its major-element composition to the Glacier Peak G bed, but it shows considerable differences in trace element concentrations. The Irvine bed is likely considerably older than the G and B tephras and probably records an additional Plinian eruption, perhaps also from Glacier Peak but from a different magma than G through B. A review of the published radiocarbon ages, new ages in this study, and consideration in a Bayesian framework suggest that the widespread G and B beds are several hundred years older than widely assumed. Our revised age is about 11,600??14C yr BP or a calibrated age (at 2 sigma) of 13,710-13,410??cal yr BP. ?? 2008 University of Washington.
Suggested Citation
Kuehn, S., Froese, D., Carrara, P., Foit, F., Pearce, N., Rotheisler, P., 2009, Major- and trace-element characterization, expanded distribution, and a new chronology for the latest Pleistocene Glacier Peak tephras in western North America: Quaternary Research, v. 71, no. 2, p. 201-216, https://doi.org/10.1016/j.yqres.2008.11.003.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Major- and trace-element characterization, expanded distribution, and a new chronology for the latest Pleistocene Glacier Peak tephras in western North America |
| Series title | Quaternary Research |
| DOI | 10.1016/j.yqres.2008.11.003 |
| Volume | 71 |
| Issue | 2 |
| Publication Date | January 20, 2017 |
| Year Published | 2009 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Quaternary Research |
| First page | 201 |
| Last page | 216 |