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Physics of the Earth and Planetary Interiors 156 (2006) 194204 A summary of Brunhes paleomagnetic field variability

Summary: Physics of the Earth and Planetary Interiors 156 (2006) 194204
A summary of Brunhes paleomagnetic field variability
recorded in Ocean Drilling Program cores
Steve Lunda,, Joseph S. Stonerb, James E.T. Channellc, Gary Actond
a University of Southern California, Los Angeles, USA
b Oregon State University, Corvallis, USA
c University of Florida, Gainesville, USA
d University of California, Davis, USA
Received 22 March 2005; received in revised form 5 October 2005; accepted 10 October 2005
The Ocean Drilling Program (ODP) has recovered many long sediment sequences from around the World that contain medium to
high-resolution paleomagnetic records of Brunhes age. These records have provided an important new global view of geomagnetic
field variability during `stable' magnetic (dipole) polarity that could not be recovered by conventional terrestrial or deep-sea piston
coring. The ODP paleomagnetic records of directional variability can be routinely recovered and used regionally as a very high-
resolution relative chronostratigraphic tool (200 yr resolution). ODP paleomagnetic records of Brunhes age relative paleointensity
have dramatically improved our understanding of global geomagnetic field intensity. These records document the global-scale pattern
of paleointensity and demonstrate its use as a high-resolution relative chronostratigraphic tool that under ideal conditions could have
a precision of 500 yr. ODP paleomagnetic records and associated oxygen isotope chronostratigraphies have also greatly improved
our understanding of the number and ages of Brunhes geomagnetic field excursions, and their relationship to normal directional
secular variation and paleointensity variability. Although significant progress has been made though ODP paleomagnetic studies of


Source: Acton, Gary - Department of Geology, University of California, Davis


Collections: Geosciences