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Appropriate editorial action will be taken once this matter is resolved. Temporal details of the impact event on a fine scale hour-to-day , important to understanding the early trajectory of mass-extinction, have largely eluded previous studies.
This study employs histological and histo-isotopic analyses of fossil fish that were coeval with a unique impact-triggered mass-death assemblage from the Cretaceous-Paleogene KPg boundary in North Dakota USA.
The severity and taxonomic symmetry of response to global natural hazards are influenced by the season during which they occur, suggesting that post-impact perturbations could have exerted a selective force that was exacerbated by seasonal timing. Data from this study can also provide vital hindsight into patterns of extant biotic response to global-scale hazards that are relevant to both current and future biomes.
The Chicxulub impact is widely regarded as the primary driver for the Cretaceous-Paleogene KPg mass extinction 1 , 2 , 3 and launched multiple long-term, planet-wide impacts for life on Earth. A globally distributed Iridium-rich clay at the KPg boundary, constituting the re-accretion of impact fallout, was one of the first indicators of a massive extra-terrestrial impact 1.
