From the superchron to the microchron: magnetic stratigraphy in deep sea sediments. (includes related article) (25 Years of Ocean Drilling) From: Oceanus | Date: December 22, 1993| Author: | COPYRIGHT 1993 Woods Hole Oceanographic Institution. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information) Copyright information

Magnetic polarity stratigraphy may be used as a correlation and dating method for marine sediments. It is based on the reversal of the Earth's prevailing magnetic field after every few thousand years. A magnetic polarity time scale of 300 reversals over the last 160 million years has been obtained based on the study of sedimentary rocks, which acquire the signature of the prevailing magnetic field as they are deposited.

Sediments acquire the signature of Earth's prevailing magnetic field at the time of their deposition. Because the polarity of the geomagnetic field has reversed repeatedly ...

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