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Chicxulub impact event is Cretaceous/Paleogene boundary in age: New micropaleontological evidence

Chicxulub impact event is Cretaceous/Paleogene boundary in age: New micropaleontological evidence,10.1016/j.epsl.2006.07.020,Earth and Planetary Scien

Chicxulub impact event is Cretaceous/Paleogene boundary in age: New micropaleontological evidence   (Citations: 18)
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High-resolution and quantitative planktic foraminiferal biostratigraphy from two SE Mexico stratigraphic sections (Bochil, Guayal) shows that the Chicxulub-related Complex Clastic Unit (CCU) is synchronous with the ejecta-rich airfall layer and the Cretaceous/Paleogene (K/Pg) catastrophic mass extinction horizon in the El Kef (Tunisia) and Caravaca (Spain) sections. The lowermost Danian H. holmdelensis subzone (=Biozone P0) was identified in both sections in a thin dark clay bed just above the CCU, proving that such bed is chronostratigraphically equivalent to the K/Pg boundary clay of the El Kef stratotype. These new micropaleontogical data confirm that the K/Pg impact event and the Chicxulub impact event are the same one. This contradicts the suggestion by others that the Chicxulub impact predated the K/Pg boundary by about 300 ka.
Journal: Earth and Planetary Science Letters - EARTH PLANET SCI LETT , vol. 249, no. 3, pp. 241-257, 2006
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    • ...Smit and Ten Kate,1982; Sharpton et al.,1992; Rocchia et al., 1987; Peryt et al., 1993; Smit et al., 1996; Robin and Rocchia, 1998; Arenillas et al., 2006)...
    • ...As also observed by Arenillas et al. (2006) at the El Kef section, A. cretacea is the only species having its LOD slightly below the K/Pg boundary...

    Njoud Gallalaet al. Catastrophic mass extinction and assemblage evolution in planktic fora...

    • ... arise from the Quaternary period, comprising all historical events such as the 2004 Indian Ocean earthquake-generated tsunami (e.g., Kench et al. 2006; Moore et al. 2006; Razzhigaeva et al. 2006), the Cascadia subduction zone earthquakes and tsunamis (e.g., Benson et al. 1999; Darienzo and Peterson 1995; Fiedorowicz 1997), the 1883 Krakatau eruption and tsunami (e.g., Carey et al. 2001), the 1755 Lisbon earthquake and tsunami (e.g., Abrantes ...

    Paula Dunbaret al. Global tsunami deposits database

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