Oceanic Anoxia and the End Permian Mass Extinction

  title={Oceanic Anoxia and the End Permian Mass Extinction},
  author={Paul B. Wignall and Richard J. Twitchett},
  pages={1155 - 1158}
Data on rocks from Spitsbergen and the equatorial sections of Italy and Slovenia indicate that the world's oceans became anoxic at both low and high paleolatitudes in the Late Permian. Such conditions may have been responsible for the mass extinction at this time. This event affected a wide range of shelf depths and extended into shallow water well above the storm wave base. 
Permo-Triassic Boundary Superanoxia and Stratified Superocean: Records from Lost Deep Sea
  • Isozaki
  • Environmental Science, Geography
  • 1997
The symmetry in lithostratigraphy and redox condition of the boundary sections suggest that the superocean Panthalassa became totally stratified for nearly 20 million years across the Permo-Triassic boundary.
Facies changes across the Triassic–Jurassic boundary in Nevada, USA
A combination of data from litho‐ and biofacies and gamma‐ray spectrometry indicates an upward marine shallowing in the late Rhaetian succession of Nevada followed by deepening in the early
Geochemistry of the end-Permian extinction event in Austria and Italy: No evidence for an extraterrestrial component
The end-Permian mass extinction (251 Ma) was the largest in Earth's history, and the great extent of biospheric perturbation is recorded as dramatic shifts in carbon isotope ratios of sedimentary
Climate simulation of the latest Permian: Implications for mass extinction
Life at the Permian-Triassic boundary (ca. 251 Ma) underwent the largest disruption in Earth's history. Paleoclimatic data indicate that Earth was significantly warmer than present and that much of
Altered river morphology in south africa related to the permian-triassic extinction
Evidence from correlative nonmarine strata elsewhere in the world containing fluvial Permian-Triassic boundary sections suggests that a catastrophic terrestrial die-off of vegetation was a global event, producing a marked increase in sediment yield as well as contributing to the global delta(13)C excursion across the Permians-Tri Jurassic boundary.
Transient Permian-Triassic euxinia in the southern Panthalassa deep ocean
Both the duration and severity of deep-water anoxic conditions across the Permian-Triassic mass extinction (PTME) are controversial. Panthalassa Ocean circulation models yield varying results,
Salinity changes and anoxia resulting from enhanced run-off during the late Permian global warming and mass extinction event
Abstract. The late Permian biotic crisis had a major impact on marine and terrestrial environments. Rising CO2 levels following Siberian Trap volcanic activity were likely responsible for expanding
Two pulses of oceanic environmental disturbance during the Permian–Triassic boundary crisis


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.
A brachiopod calcite record of the oceanic carbon and oxygen isotope shifts at the Permian/Triassic transition
The Permian/Triassic (P/T) mass extinction was the most dramatic of all such events but its cause has thus far remained elusive1–3. Carbon and oxygen isotope analyses may offer clues to this puzzle
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.
Permian-Triassic extinction: Organic δ13C evidence from British Columbia, Canada
The Permian-Triassic (P-T) extinction is documented geochemically in a marine sequence deposited in a basinal setting at Williston Lake, northeastern British Columbia, by using elemental and isotopic
Facies and paleogeography of the marine Upper Permian and of the Permian-Triassic boundary in the Southern Alps (Bellerophon formation, Tesero Horizon)
SummaryThe marine Upper Permian and the Permian-Triassic boundary of the Southern Alps between Val Adige (Southern Tyrol, northern Italy) and the Karawanken Mountains (northern Yugoslavia) were
A Double Mass Extinction at the End of the Paleozoic Era
Three tests based on fossil data indicate that high rates of extinction recorded in the penultimate (Guadalupian) stage of the Paleozoic era are not artifacts of a poor fossil record. Instead, they
Parallel trends in organic and inorganic carbon isotopes across the Permian/Triassic boundary
Stable carbon isotope ratios in both inorganic and organic reservoirs have been widely applied to model environmental and sedimentological changes on a global scale. Most studies dealing with major
The Enrichment of Ore Deposits
UNDER the above modest guise the United States Geological Survey has published a volume of the greatest value to the student of ore deposition, which may fairly claim to rank as one of the most