 |
| Detailed Reference Information |
|---|
|
Mankinen, E.A. and Wentworth, C.M. (2004). Mono Lake excursion recorded in sediment of the Santa Clara Valley, California. Geochemistry Geophysics Geosystems 5: doi: 10.1029/2003GC000592. issn: 1525-2027. |
|
|
Two intervals recording anomalous paleomagnetic inclinations were encountered in the top 40 meters of research drill hole CCOC in the Santa Clara Valley, California. The younger of these two intervals has an age of 28,090 ¿ 330 radiocarbon years B.P. (calibrated age ~32.8 ka). This age is in excellent agreement with the latest estimate for the Mono Lake excursion at the type locality and confirms that the excursion has been recorded by sediment in the San Francisco Bay region. The age of an anomalous inclination change below the Mono Lake excursion was not directly determined, but estimates of sedimentation rates indicate that the geomagnetic behavior it represents most likely occurred during the Mono Lake/Laschamp time interval (~45--28 ka). If true, it may represent one of several recurring fluctuations of magnetic inclination during an interval of a weak geomagnetic dipole, behavior noted in other studies in the region. Two intervals recording anomalous paleomagnetic inclinations were encountered in the top 40 meters of research drill hole CCOC in the Santa Clara Valley, California. The younger of these two intervals has an age of 28,090 ¿ 330 radiocarbon years B.P. (calibrated age ~32.8 ka). This age is in excellent agreement with the latest estimate for the Mono Lake excursion at the type locality and confirms that the excursion has been recorded by sediment in the San Francisco Bay region. The age of an anomalous inclination change below the Mono Lake excursion was not directly determined, but estimates of sedimentation rates indicate that the geomagnetic behavior it represents most likely occurred during the Mono Lake/Laschamp time interval (~45--28 ka). If true, it may represent one of several recurring fluctuations of magnetic inclination during an interval of a weak geomagnetic dipole, behavior noted in other studies in the region. |
|
|
|
| BACKGROUND DATA FILES |
|
 |
Abstract |
 |
 |
|
Abstract |
|
|
|
|
Table 1 |
|
|
|
Table 1 |
|
|
|
|
Methods |
|
|
|
Methods |
|
|
|
|
|
Keywords
Geomagnetism and Paleomagnetism, Geomagnetic excursions, Geomagnetism and Paleomagnetism, Rapid time variations, Geomagnetism and Paleomagnetism, Time variations—secular and long term, Mono Lake excursion |
|
Journal
Geochemistry Geophysics Geosystems |
|
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org |
|
|
|