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
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
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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