No evidence of multiple impact scenario across the Cretaceous/ Paleogene boundary based on planktic foraminiferal biochronology

Large bolide impacts seem to have strongly affected biological evolution, causing detrimental effects on the biosphere. The best-known case is the Chicxulub impact (Yucatan Peninsula, Mexico), the most probable trigger of the Cretaceous/ Paleogene boundary (KPB) mass extinction. Nevertheless, after four decades of intensive research, a consensus on the causal relationship between the impact and the mass *josearz@unizar.es; ias@unizar.es; mgrajales@geologia.unam.mx; carluis@unizar.es; anasoria@unizar.es; rojas@ceinpet.cupet.cu; tcalmus@unam.mx; vgilabert@unizar.es. Arz, J.A., Arenillas, I., Grajales-Nishimura, J.M., Liesa, C.L., Soria, A.R., Rojas, R., Calmus, T., and Gilabert, V., 2022, No evidence of multiple impact scenario across the Cretaceous/Paleogene boundary based on planktic foraminiferal biochronology, in Koeberl, C., Claeys, P., and Montanari, A., eds., From the Guajira Desert to the Apennines, and from Mediterranean Microplates to the Mexican Killer Asteroid: Honoring the Career of Walter Alvarez: Geological Society of America Special Paper 557, p. 1–34, https://doi.org/10.1130/2022.2557(20). © 2022 The Authors. Gold Open Access: This chapter is published under the terms of the CC-BY license and is available open access on www.gsapubs.org. OPEN ACCESS GO LD Downloaded from http://pubs.geoscienceworld.org/books/gsa/books/book/2351/chapter-pdf/5556103/spe557-20.pdf by guest on 04 March 2022