Joost Frieling (a), Holger Gebhardt (b), Olujide A. Adekeye (c), Samuel. O. Akande (c), Gert-Jan Reichart (a,d), Jack J. Middelburg (a), Stephan Schouten (a,d) & Appy Sluijs (a)
(a) Department of Earth Sciences, Utrecht University, Budapestlaan 4, 3584CD Utrecht, Netherlands. E-mail: j.frieling1@uu.nl
(b) Geologische Bundesanstalt, Neulinggasse 38, A 1030 Wien, Austria.
(c) Department of Geology and Mineral Sciences, University of Ilorin, P.M.B. 1515, Kwara State, Nigeria.
(d) NIOZ Royal Netherlands Institute for Sea Research, 1790AB Den Burg, Texel, The Netherlands .