Refining the Quaternary Geomagnetic Instability Time Scale: The Laschamp Excursion Dated from a Speleothem Record

Abstract

Short-lived events such as geomagnetic excursions are global events that are used for dating purposes across scientific disciplines. A critical ingredient for characterizing such geomagnetic instabilities are tightly constrained age models that enable high-resolution magnetostratigraphies. The focus of this study is a speleothem geomagnetic record of the Laschamp excursion, which was the first geomagnetic excursion recognized and described in the paleomagnetic record, and remains the most studied event of its kind