Late Devonian ' Kellwasser Event' mass- extinction horizon in Germany: no geochemical evidence for a large-body impact.

G. R. McGhee, C. J. Orth, L. R. Quintana, J. S. Gilmore, E. J. Olsen

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Abstract

We report here the results of an extensive geochemical analysis of the Kellwasser stratigraphic interval in a section with exceptional conodont zonal control in the Federal Republic of Germany. No Ir anomaly was found. No shock-metamorphosed quartz, sanidine spherules, or siderophile-rich magnetic spherules were found. Oxygen-isotope ratios show little variation across the mass-extinction horizon. We further note that the Australian Ir anomaly 1) is most likely not associated with a large-body impact because no equivalent Ir signature occurs in Europe and 2) is stratigraphically above the European biological crisis horizon, thus postdating the Kellwasser mass-extinction event. -from Authors

Original languageEnglish (US)
Pages (from-to)776-779
Number of pages4
JournalGeology
Volume14
Issue number9
DOIs
StatePublished - Jan 1 1986

All Science Journal Classification (ASJC) codes

  • Geology

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