Comparative Earth History and Late Permian Mass Extinction

  title={Comparative Earth History and Late Permian Mass Extinction},
  author={Andrew H. Knoll and Richard K. Bambach and Daniel E. Jr. Canfield and John P. Grotzinger},
  pages={452 - 457}
The repeated association during the late Neoproterozoic Era of large carbon-isotopic excursions, continental glaciation, and stratigraphically anomalous carbonate precipitation provides a framework for interpreting the reprise of these conditions on the Late Permian Earth. A paleoceanographic model that was developed to explain these stratigraphically linked phenomena suggests that the overturn of anoxic deep oceans during the Late Permian introduced high concentrations of carbon dioxide into… 

Large Perturbations of the Carbon Cycle During Recovery from the End-Permian Extinction

High-resolution carbon isotope measurements of multiple stratigraphic sections in south China demonstrate that the pronounced carbon isotopic excursion at the Permian-Triassic boundary was not an

Isotopes, ice ages, and terminal Proterozoic earth history.

Detailed correlations of ancient glacial deposits, based on temporal records of carbon and strontium isotopes in seawater, indicate four (and perhaps five) discrete ice ages in the terminal

Abrupt and Gradual Extinction Among Late Permian Land Vertebrates in the Karoo Basin, South Africa

The vertebrate fossil data show a gradual extinction in the Upper Permian punctuated by an enhanced extinction pulse at the Permians-Triassic boundary interval, particularly among the dicynodont therapsids, coinciding with negative carbon-isotope anomalies.

Carbon isotope anomaly and other geochemical changes at the Triassic-Jurassic boundary from a marine section in Hungary

Most mass extinctions are linked with carbon isotope excursions, implying that biotic crises are coupled with changes in the global carbon cycle. The isotopic evolution during the end-Triassic

The Source and Fate of Massive Carbon Input During the Latest Paleocene Thermal Maximum.

The deposition of a mud clast interval and seismic evidence for slope disturbance provide evidence to confirm the gas hydrate dissociation hypothesis and identify the Blake Nose as a site of methane release.

A neoproterozoic snowball earth

Negative carbon isotope anomalies in carbonate rocks bracketing Neoproterozoic glacial deposits in Namibia, combined with estimates of thermal subsidence history, suggest that biological productivity

Phosphorus, nitrogen, and the redox evolution of the Paleozoic oceans

A new high-resolution Paleozoic d 13 Ccarb curve from the Great Basin shows an amount of variation that appears transitional between the highly unsettled Neoproterozoic and the increasingly stable

End-Permian Mass Extinction in the Oceans: An Ancient Analog for the Twenty-First Century?

The greatest loss of biodiversity in the history of animal life occurred at the end of the Permian Period (∼252 million years ago). This biotic catastrophe coincided with an interval of widespread



The Permo–Triassic extinction

  • D. Erwin
  • Geography, Environmental Science
  • 1994
The end-Permian mass extinction brought the Palaeozoic great experiment in marine life to a close during an interval of intense climatic, tectonic and geochemical change. Improved knowledge of latest

Permian-Triassic Life Crisis on Land

The Permian-Triassic boundary at 251 million years ago was a time of abrupt decline in both diversity and provincialism of floras in southeastern Australia and extinction of the Glossopteris flora.

Changes in marine isotopic composition and the late Ordovician glaciation

Well-preserved brachiopod shells and marine cements from limestone coquinas which cap carbonate mudmounds in the Siljan area of central Sweden have the heaviest stable oxygen and carbon isotope

Bathymetric and isotopic evidence for a short-lived Late Ordovician glaciation in a greenhouse period

The end Ordovician glaciation is distinct among Phanerozoic glaciations in that CO 2 , levels were generally high, yet major continental ice sheets accumulated on the Gondwana supercontinent. New

Synchrony and Causal Relations Between Permian-Triassic Boundary Crises and Siberian Flood Volcanism

Analysis of 40Ar/39Ar data from two tuffs in southern China yielded a date comparable to the inception of main stage Siberian flood volcanism at 250.0 � 0.2 million years ago for the Permian-Triassic boundary.