Articles | Volume 20, issue 1
Research article
03 Jan 2024
Research article |  | 03 Jan 2024

Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse?

Madeleine L. Vickers, Morgan T. Jones, Jack Longman, David Evans, Clemens V. Ullmann, Ella Wulfsberg Stokke, Martin Vickers, Joost Frieling, Dustin T. Harper, Vincent J. Clementi, and IODP Expedition 396 Scientists

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Cited articles

Alley, N. F., Hore, S. B., and Frakes, L. A.: Glaciations at high-latitude Southern Australia during the Early Cretaceous, Aust. J. Earth Sci., 67, 1045–1095,, 2020 
Berndt, C., Planke, S., Alvestad, E., Tsikalas, F., and Rasmussen, T.: Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectonomagmatic break-up processes, J. Geol. Soc. London, 158, 413–426,, 2001. 
Boch, R., Dietzel, M., Reichl, P., Leis, A., Baldermann, A., Mittermayr, F., and Pölt, P.: Rapid ikaite (CaCO3 6H2O) crystallization in a man-made river bed: hydrogeochemical monitoring of a rarely documented mineral formation, Appl. Geochem., 63, 366–379,, 2015. 
Buchardt, B., Israelson, C., Seaman, P., and Stockmann, G.: Ikaite tufa towers in Ikka Fjord, southwest Greenland: their formation by mixing of seawater and alkaline spring water, J. Sediment. Res., 71, 176–189,, 2001. 
Short summary
The discovery of cold-water glendonite pseudomorphs in sediments deposited during the hottest part of the Cenozoic poses an apparent climate paradox. This study examines their occurrence, association with volcanic sediments, and speculates on the timing and extent of cooling, fitting this with current understanding of global climate during this period. We propose that volcanic activity was key to both physical and chemical conditions that enabled the formation of glendonites in these sediments.