Articles | Volume 44, issue 2
https://doi.org/10.5194/jm-44-713-2025
https://doi.org/10.5194/jm-44-713-2025
Research article
 | 
19 Dec 2025
Research article |  | 19 Dec 2025

Deep-sea benthic foraminiferal response to the Late Lutetian Thermal Maximum at Demerara Rise (ODP Site 1260, equatorial western Atlantic)

Irene Peñalver-Clavel, Thomas Westerhold, and Laia Alegret

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Cited articles

Alegret, L. and Thomas, E.: Upper cretaceous and lower Paleogene benthic foraminifera from northeastern Mexico, Micropaleontology, 47, 269–316, 2001. 
Alegret, L. and Thomas, E.: Food supply to the seafloor in the Pacific Ocean after the Cretaceous/Paleogene boundary event, Mar. Micropaleontol., 73, 105–116, https:// doi.org/10.1016/j.marmicro.2009.07.005, 2009. 
Alegret, L., Ortiz, S., Orue-Etxebarria, X., Bernaola, G., Baceta, J.I., Monechi, S., Apellaniz, E., and Pujalte, V.: The Paleocene–Eocene thermal maximum: new data from the microfossil turnover at Zumaia section, Palaios, 24, 318–328, https://doi.org/10.2110/palo.2008.p08-057r, 2009. 
Alegret, L., Ortiz, S., Arenillas, I., and Molina, E.: What happens when the ocean is overheated? The foraminiferal response across the Paleocene-Eocene Thermal Maximum at the Alamedilla section (Spain), GSA Bull., 122, 1616–1624, 2010. 
Alegret, L., Reolid, M., and Vega Pérez, M.: Environmental instability during the latest Paleocene at Zumaia (Basque-Cantabric Basin): the herald of the Paleocene Eocene Thermal Maximum, Palaeogeogr. Palaeoclimatol. Palaeoecol., 497, 186–200, https://doi.org/10.1016/j.palaeo.2018.02.018, 2018. 
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Short summary
A study in the equatorial Atlantic Ocean (Ocean Drilling Program Site 1260) reveals the deep-sea biotic response to a middle Eocene warming event 41.52 million years ago. Low-diversity benthic foraminiferal assemblages indicate environmental stress during the warming event. We argue that the biotic response in the deep sea and carbonate dissolution at this site were likely related to its paleoceanographic setting.
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