Mono Lake excursion recorded in sediment of the Santa Clara Valley, California
Article first published online: 4 FEB 2004
Copyright 2004 by the American Geophysical Union.
Geochemistry, Geophysics, Geosystems
Volume 5, Issue 2, February 2004
How to Cite
2004), Mono Lake excursion recorded in sediment of the Santa Clara Valley, California, Geochem. Geophys. Geosyst., 5, Q02H05, doi:10.1029/2003GC000592., and (
- Issue published online: 4 FEB 2004
- Article first published online: 4 FEB 2004
- Manuscript Accepted: 4 DEC 2003
- Manuscript Revised: 13 NOV 2003
- Manuscript Received: 17 JUN 2003
- Mono Lake excursion
 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.