Encyclopedia of Scientific Dating Methods

Living Edition
| Editors: W. Jack Rink, Jeroen Thompson

Magnetostratigraphic Dating

Living reference work entry
DOI: https://doi.org/10.1007/978-94-007-6326-5_115-1

Definition

Magnetostratigraphy relies on the ability of sedimentary rocks to acquire a remanent magnetization when they form, which parallels the direction of the Earth’s ambient magnetic field. Since the geomagnetic field has undergone multiple nonperiodic reversals through Earth history, a magnetic zonation of sedimentary sequences is feasible according to the polarity of the rock magnetization. A magnetostratigraphic zonation allows dividing the stratigraphic record into time slices which can be correlated worldwide. Magnetostratigraphic dating refers to the identification in the stratigraphic record of magnetozones, which can be correlated to age-equivalent geomagnetic chrons. The compiled absolute ages of geomagnetic chrons form the basis for the geomagnetic polarity time scale (GPTS), which is routinely revised with new radiometric or astronomic calibrations (Fig. 1).

Keywords

Magnetic Mineral Natural Remanent Magnetization Reversal Test Paleomagnetic Direction Geomagnetic Reversal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.University of BarcelonaBarcelonaSpain