Mark J Dekkers¹, Freek Busschers², Wouter de Weger³, Bob van der Sluis³, Cor G Langereis⁴, Timme Donders⁵, Alexander J.P. Houben², Wout Krijgsman⁶ and Wim Westerhoff², (1)Utrecht University, Paleomagnetic Laboratory, Fort Hoofddijk, Utrecht, Netherlands, (2)Geological Survey of the Netherlands, Utrecht, Netherlands, (3)Utrecht University, Department of Earth Sciences, Utrecht, Netherlands, (4)Utrecht University, Utrecht, Netherlands, (5)Geological Survey of the Neth., Utrecht, Netherlands, (6)Utrecht Univ, Utrecht, Netherlands