Articles | Volume 11, issue 3
Research article
18 Mar 2015
Research article |  | 18 Mar 2015

Freshwater discharge controlled deposition of Cenomanian–Turonian black shales on the NW European epicontinental shelf (Wunstorf, northern Germany)

N. A. G. M. van Helmond, A. Sluijs, J. S. Sinninghe Damsté, G.-J. Reichart, S. Voigt, J. Erbacher, J. Pross, and H. Brinkhuis

Related authors

Removal of phosphorus and nitrogen in sediments of the eutrophic Stockholm archipelago, Baltic Sea
Niels A. G. M. van Helmond, Elizabeth K. Robertson, Daniel J. Conley, Martijn Hermans, Christoph Humborg, L. Joëlle Kubeneck, Wytze K. Lenstra, and Caroline P. Slomp
Biogeosciences, 17, 2745–2766,,, 2020
Short summary
Large variations in iron input to an oligotrophic Baltic Sea estuary: impact on sedimentary phosphorus burial
Wytze K. Lenstra, Matthias Egger, Niels A. G. M. van Helmond, Emma Kritzberg, Daniel J. Conley, and Caroline P. Slomp
Biogeosciences, 15, 6979–6996,,, 2018
Short summary
Equatorward phytoplankton migration during a cold spell within the Late Cretaceous super-greenhouse
Niels A. G. M. van Helmond, Appy Sluijs, Nina M. Papadomanolaki, A. Guy Plint, Darren R. Gröcke, Martin A. Pearce, James S. Eldrett, João Trabucho-Alexandre, Ireneusz Walaszczyk, Bas van de Schootbrugge, and Henk Brinkhuis
Biogeosciences, 13, 2859–2872,,, 2016
Short summary
Biogeochemistry of the North Atlantic during oceanic anoxic event 2: role of changes in ocean circulation and phosphorus input
I. Ruvalcaba Baroni, R. P. M. Topper, N. A. G. M. van Helmond, H. Brinkhuis, and C. P. Slomp
Biogeosciences, 11, 977–993,,, 2014

Related subject area

Subject: Carbon Cycle | Archive: Marine Archives | Timescale: Pre-Cenozoic
Driving mechanisms of organic carbon burial in the Early Cretaceous South Atlantic Cape Basin (DSDP Site 361)
Wolf Dummann, Sebastian Steinig, Peter Hofmann, Matthias Lenz, Stephanie Kusch, Sascha Flögel, Jens Olaf Herrle, Christian Hallmann, Janet Rethemeyer, Haino Uwe Kasper, and Thomas Wagner
Clim. Past, 17, 469–490,,, 2021
Short summary
Cretaceous oceanic anoxic events prolonged by phosphorus cycle feedbacks
Sebastian Beil, Wolfgang Kuhnt, Ann Holbourn, Florian Scholz, Julian Oxmann, Klaus Wallmann, Janne Lorenzen, Mohamed Aquit, and El Hassane Chellai
Clim. Past, 16, 757–782,,, 2020
Short summary
Dynamic climate-driven controls on the deposition of the Kimmeridge Clay Formation in the Cleveland Basin, Yorkshire, UK
Elizabeth Atar, Christian März, Andrew C. Aplin, Olaf Dellwig, Liam G. Herringshaw, Violaine Lamoureux-Var, Melanie J. Leng, Bernhard Schnetger, and Thomas Wagner
Clim. Past, 15, 1581–1601,,, 2019
Short summary
Latest Permian carbonate carbon isotope variability traces heterogeneous organic carbon accumulation and authigenic carbonate formation
Martin Schobben, Sebastiaan van de Velde, Jana Gliwa, Lucyna Leda, Dieter Korn, Ulrich Struck, Clemens Vinzenz Ullmann, Vachik Hairapetian, Abbas Ghaderi, Christoph Korte, Robert J. Newton, Simon W. Poulton, and Paul B. Wignall
Clim. Past, 13, 1635–1659,,, 2017
Short summary
Water-mass evolution in the Cretaceous Western Interior Seaway of North America and equatorial Atlantic
James S. Eldrett, Paul Dodsworth, Steven C. Bergman, Milly Wright, and Daniel Minisini
Clim. Past, 13, 855–878,,, 2017
Short summary

Cited articles

Arthur, M. A., Dean, W. E., and Pratt, L. M.: Geochemical and climatic effects of increased marine organic carbon burial at the Cenomanian/Turonian boundary, Nature, 335, 714–717, 1988.
Barclay, R. S., McElwain, J. C., and Sageman, B. B.: Carbon sequestration activated by avolcanic CO2 pulse during Oceanic Anoxic Event 2, Nat. Geosci., 3, 205–208, 2010.
Barron, E. J.: A warm, equable Cretaceous: the nature of the problem, Earth-Sci. Rev., 19, 305–338, 1983.
Bice, K. L., Birgel, D., Meyers, P. A., Dahl, K. A., Hinrichs, K.-U., and Norris, R. D.: A multiple proxy and model study of the Cretaceous upper ocean temperatures and atmospheric CO2 concentrations, Paleoceanography, 21, PA2002,, 2006.
Blättler, C. L., Jenkyns, H. C., Reynard, L. M., and Henderson, G. M.: Significant increases in global weathering during Oceanic Anoxic Events 1a and 2 indicated by calcium isotopes, Earth Planet. Sci. Lett., 309, 77–88,2011.
Short summary
Based on the chemistry and microfossils preserved in sediments deposited in a shallow sea, in the current Lower Saxony region (NW Germany), we conclude that changes in Earth’s orbit around the Sun led to enhanced rainfall and organic matter production. The additional supply of organic matter, depleting oxygen upon degradation, and freshwater, inhibiting the mixing of oxygen-rich surface waters with deeper waters, caused the development of oxygen-poor waters about 94 million years ago.