Life before impact in the Chicxulub area: unique marine ichnological signatures preserved in crater suevite
Metadatos
Mostrar el registro completo del ítemEditorial
Springer Nature
Fecha
2022-07-05Referencia bibliográfica
Rodríguez-Tovar, F.J., Kaskes, P., Ormö, J. et al. Life before impact in the Chicxulub area: unique marine ichnological signatures preserved in crater suevite. Sci Rep 12, 11376 (2022). [https://doi.org/10.1038/s41598-022-15566-z]
Patrocinador
Centro de Astrobiología; Enthought, Inc.; European Consortium for Ocean Research Drilling; Feder Andalucía; ICDP; INTA-CSIC; IODP; Junta de Andalucía-Consejería de Economía y Conocimiento; MCIN; Project A-RNM-368-UGR20, B-RNM-072-UGR18, P18-RT-4074; Tessa Cayton; University of Texas Institute for Geophysics Contribution 3877 and Center for Planetary Systems; Weatherford Labs; National Science Foundation OCE 1737351; United States Science Support Program; Belgian Federal Science Policy Office G0A6517N; Federación Española de Enfermedades Raras; Fonds Wetenschappelijk Onderzoek 11E6619N, 11E6621N, ESP2015-65712-C5-1-R, ESP2017-87676-C5-1-R; Universidad Nacional Autónoma de México PID2019-104625RB-100; European Regional Development Fund; Ministerio de Asuntos Económicos y Transformación Digital, Gobierno de España; Junta de Andalucía; Agencia Estatal de Investigación 13039/501100011033, MDM-2Resumen
To fully assess the resilience and recovery of life in response to the Cretaceous–Paleogene (K-Pg) boundary mass extinction ~ 66 million years ago, it is paramount to understand biodiversity prior to the Chicxulub impact event. The peak ring of the Chicxulub impact structure offshore the Yucatán Peninsula (México) was recently drilled and extracted a ~ 100 m thick impact-generated, melt-bearing, polymict breccia (crater suevite), which preserved carbonate clasts with common biogenic structures. We pieced this information to reproduce for the first time the macrobenthic tracemaker community and marine paleoenvironment prior to a large impact event at the crater area by combining paleoichnology with micropaleontology. A variable macrobenthic tracemaker community was present prior to the impact (Cenomanian–Maastrichtian), which included soft bodied organisms such as annelids, crustaceans and bivalves, mainly colonizing softgrounds in marine oxygenated, nutrient rich, conditions. Trace fossil assemblage from these upper Cretaceous core lithologies, with dominant Planolites and frequent Chondrites, corresponds well with that in the overlying post-impact Paleogene sediments. This reveals that the K-Pg impact event had no significant effects (i.e., extinction) on the composition of the macroinvertebrate tracemaker community in the Chicxulub region.