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Age and pattern of the southern high-latitude continental end-Permian extinction constrained by multiproxy analysis
University of Nebraska.ORCID iD: 0000-0002-2397-6116
University of Nebraska.ORCID iD: 0000-0002-8422-7389
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-6723-239X
Swedish Museum of Natural History, Department of Paleobiology. Department of Geology, Lund University, Sweden.ORCID iD: 0000-0003-2987-5559
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2019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, no 385, p. 1-12Article in journal (Refereed) Published
Abstract [en]

Past studies of the end-Permian extinction (EPE), the largest biotic crisis of the Phanerozoic, have not resolved the timing of events in southern high-latitudes. Here we use palynology coupled with high-precision CA-ID-TIMS dating of euhedral zircons from continental sequences of the Sydney Basin, Australia, to show that the collapse of the austral Permian Glossopteris flora occurred prior to 252.3 Ma (~370 kyrs before the main marine extinction). Weathering proxies indicate that floristic changes occurred during a brief climate perturbation in a regional alluvial landscape that otherwise experienced insubstantial change in fluvial style, insignificant reorganization of the depositional surface, and no abrupt aridification. Palaeoclimate modelling suggests a moderate shift to warmer summer temperatures and amplified seasonality in temperature across the EPE, and warmer and wetter conditions for all seasons into the Early Triassic. The terrestrial EPE and a succeeding peak in Ni concentration in the Sydney Basin correlate, respectively, to the onset of the primary extrusive and intrusive phases of the Siberian Traps Large Igneous Province.

Place, publisher, year, edition, pages
London, 2019. Vol. 10, no 385, p. 1-12
Keywords [en]
mass extinction, Palaeozoic, Radiometric dating, palaeobotany, palynology, geochemistry
National Category
Other Earth and Related Environmental Sciences
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-3413DOI: 10.1038/s41467-018-07934-zOAI: oai:DiVA.org:nrm-3413DiVA, id: diva2:1372908
Funder
Swedish Research Council, 2015-4264Swedish Research Council, 2014-5234
Note

This research was additionally funded by collaborative research grants from the National Science Foundation (EAR-1636625 to C.R.F. and T.D.F. and EAR-1636629 to A.W. and C.W.).

Available from: 2019-02-01 Created: 2019-11-25Bibliographically approved

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Publisher's full texthttps://doi.org/10.1038/s41467-018-07934-z

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