Mono Lake excursion recorded in sediment of the Santa Clara Valley, California

Geochemistry, Geophysics, Geosystems
By:  and 



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.

Publication type Article
Publication Subtype Journal Article
Title Mono Lake excursion recorded in sediment of the Santa Clara Valley, California
Series title Geochemistry, Geophysics, Geosystems
DOI 10.1029/2003GC000592
Volume 5
Issue 2
Year Published 2004
Language English
Publisher AGU
Contributing office(s) Geology, Minerals, Energy, and Geophysics Science Center
Description 14 p.
First page 1
Last page 14
Country United States
State California
Other Geospatial SantaClara Valley
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