Analysis of the age and paleomagnetic orientation of the Broadwell Mesa Basalt, Bristol Mountains, CA
December 31, 2017
To add to the regional paleomagnetic data documenting block rotation in eastern California, we determined the age and paleomagnetic rotation of the Broadwell Mesa basalt, a basalt in the Bristol Mountains, CA as part of an effort to constrain the timing and rotation of blocks adjacent to the fault. The east-striking sinistral Broadwell Mesa fault cuts and separates the basalt into two outcrops. An 40Ar/39Ar date from the northern outcrop yields an age of 5.46 ± 0.04 Ma. Two sites consisting of 40 paleomagnetic cores from the basalt indicate the basalt is reversely magnetized and that there has been no significant rotation (< 11º) between the two basalt outcrops.
Citation Information
| Publication Year | 2017 |
|---|---|
| Title | Analysis of the age and paleomagnetic orientation of the Broadwell Mesa Basalt, Bristol Mountains, CA |
| Authors | Geoffrey Phelps, John Hillhouse, Robert J. Fleck, David M. Miller, David C. Buesch, Andrew J. Cyr, Kevin M. Schmidt |
| Publication Type | Conference Paper |
| Publication Subtype | Conference Paper |
| Index ID | 70196903 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | Geology, Minerals, Energy, and Geophysics Science Center |
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Geoffrey Phelps, MSc
Research Geologist
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John (Jack) Hillhouse
Scientist Emeritus
Scientist Emeritus
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Robert J Fleck
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David M. Miller, Ph.D
Scientist Emeritus
Scientist Emeritus
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David C Buesch
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Andrew Cyr
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Kevin Schmidt
Research Geologist
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Geoffrey Phelps, MSc
Research GeologistEmailPhoneJohn (Jack) Hillhouse
Scientist EmeritusEmailPhoneRobert J Fleck
Research GeologistEmailPhoneDavid M. Miller, Ph.D
Scientist EmeritusEmailPhoneDavid C Buesch
Research GeologistEmailPhoneAndrew Cyr
Research GeologistEmailPhoneKevin Schmidt
Research GeologistEmailPhone