The research and teaching of Mark Dekkers, working in the paleomagnetic laboratory of the Department of Earth Sciences, is at the interface of geophysics and geochemistry. His overarching research interest is in the preservation of the paleomagnetic record, how subsequent geological processes may interfere with the original paleomagnetic signal, at all time scales  - ranging from early diagenetic processes operating shortly after the formation of a rock succession, to ongoing burial and related geodynamic processes hundreds of millions later in a rock's history. His research further includes paleointensity methodology and how anthropogenic influence can be tracked by magnetic properties. Finally, he is involved in dating hominide sites. He is teaching general geology and earth and sustainability at University College Utrecht, geochemical cycles in the bachelor Earth Sciences, and participates in the teaching of paleomagnetism and rock magnetism in the master Earth, Structure and Dynamics.