Age of the youngest volcanism at Eagle Lake, northeastern California—40Ar/39Ar and paleomagnetic results
The age of the youngest volcanism at Eagle Lake, California, was investigated using stratigraphic, paleomagnetic, and 40Ar/39Ar techniques. The three youngest volcanic lava flows at Eagle Lake yielded ages of 130.0±5.1, 127.5±3.2 and 123.6±18.7 ka, and are statistically indistinguishable. Paleomagnetic results demonstrate that two of the lava flows are very closely spaced in time, whereas the third is different by centuries to at most a few millennia. These results indicate that the basalt lava flows at Eagle Lake are not Holocene in age, and were erupted during an episode of volcanism at about 130–125 ka that is unlikely to have spanned more than a few thousand years. Thus, the short-term potential for subsequent volcanism at Eagle Lake is considered low.
Citation Information
Publication Year | 2017 |
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Title | Age of the youngest volcanism at Eagle Lake, northeastern California—40Ar/39Ar and paleomagnetic results |
DOI | 10.3133/ofr20171027 |
Authors | Michael A. Clynne, Andrew T. Calvert, Duane E. Champion, L.J.P. Muffler, Michael G. Sawlan, Drew T. Downs |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Open-File Report |
Series Number | 2017-1027 |
Index ID | ofr20171027 |
Record Source | USGS Publications Warehouse |
USGS Organization | Volcano Science Center |