Evidence for Cretaceous-Paleogene boundary bolide “impact winter” conditions from New Jersey, USA
Vellekoop, J.; Esmeray-Senlet, S.; Miller, K.G.; Browning, J.V.; Sluijs, A.; van de Schootbrugge, B.; Sinninghe Damsté, J.S.; Brinkhuis, H. (2016). Evidence for Cretaceous-Paleogene boundary bolide “impact winter” conditions from New Jersey, USA. Geology (Boulder Colo.) 44(8): 619-622. https://dx.doi.org/10.1130/G37961.1
In: Geology. Geological Society of America: Boulder. ISSN 0091-7613; e-ISSN 1943-2682, meer
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| Auteurs | | Top |
- Vellekoop, J., meer
- Esmeray-Senlet, S.
- Miller, K.G.
- Browning, J.V.
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- Sluijs, A.
- van de Schootbrugge, B.
- Sinninghe Damsté, J.S., meer
- Brinkhuis, H., meer
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| Abstract |
Abrupt and short-lived “impact winter” conditions have commonly been implicated as the main mechanism leading to the mass extinction at the Cretaceous-Paleogene (K-Pg) boundary (ca. 66 Ma), marking the end of the reign of the non-avian dinosaurs. However, so far only limited evidence has been available for such a climatic perturbation. Here we perform high-resolution TEX86 organic paleothermometry on three shallow cores from the New Jersey paleoshelf, (northeastern USA) to assess the impact-provoked climatic perturbations immediately following the K-Pg impact and to place these short-term events in the context of long-term climate evolution. We provide evidence of impact-provoked, severe climatic cooling immediately following the K-Pg impact. This so-called “impact winter” occurred superimposed on a long-term cooling trend that followed a warm phase in the latest Cretaceous. |
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