When the Compass Stopped Reversing Its Poles

See allHide authors and affiliations

Science  02 Mar 2001:
Vol. 291, Issue 5509, pp. 1714-1715
DOI: 10.1126/science.291.5509.1714

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

This article has a correction. Please see:


Earth's geomagnetic field normally reverses a few times every million years, but during "superchron" periods, this switching process may stop for 30 to 50 million years. In his Perspective, Banerjee highlights the study by Tarduno et al. , who have deduced the paleomagnetic field strength during the Cretaceous superchron from magnetite inclusions in lavas found in India. The results may provide clues to what causes the superchron periods.