Lineke Woelders (a), Appy Sluijs (b) & Peter Bijl (b)
(a) Department of Earth and Environmental Sciences, Division of Geology, KU Leuven, Celestijnenlaan 200E, B-3001 Leuven-Heverlee, Belgium. E-mail: lineke.woelders@ees.kuleuven.be
(b) Earth Sciences Department, Marine Palynology Group, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, the Netherlands.