Anoxic events in the late Frasnian - causes of the Frasnian-Famennian faunal crisis.

Joachimski M, Buggisch W (1993)

Publication Type: Journal article

Publication year: 1993

Journal

Geology Geological Society of America

Publisher: Geological Society of America

Pages Range: 675-678

Journal Issue: 21,

DOI: 10.1130/0091-7613(1993)021<0675:AEITLF>2.3.CO;2

Abstract

Carbon isotope data collected from five Frasnian-Famennian boundary sections in central Europe show two positive δ¹³C excursions in the late Frasnian (~367 Ma). Both anomalies coincided with the deposition of the bituminous lower and upper Kellwasser horizons. The carbon isotope patterns indicate two phases of enhanced burial and subsequent recycling of organic carbon. A maximum formation of warm saline waters on the subtropical to tropical epicontinental shelves during late Frasnian transgressive episodes may have induced oceanic oxygen deficits. Variations in the Corg burial rates may have resulted in changes in the CO2 concentrations in the oceans and in the atmosphere, culminating in global climatic changes. It is proposed that the repeated co-occurrences of sea-level fluctuations, anoxic conditions, and global climatic changes during the late Frasnian would affect especially the subtropical to tropical shallow-water communities and reef ecosystems, which were severely affected during the Frasnian-Famennian faunal crisis. -Authors

Authors with CRIS profile

Michael Joachimski Lehrstuhl für Geologie (Exogene Dynamik) Werner Buggisch Naturwissenschaftliche Fakultät

How to cite

APA:

Joachimski, M., & Buggisch, W. (1993). Anoxic events in the late Frasnian - causes of the Frasnian-Famennian faunal crisis. Geology, 21,, 675-678. https://dx.doi.org/10.1130/0091-7613(1993)021<0675:AEITLF>2.3.CO;2

MLA:

Joachimski, Michael, and Werner Buggisch. "Anoxic events in the late Frasnian - causes of the Frasnian-Famennian faunal crisis." Geology 21, (1993): 675-678.

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