A dolomitization event at the oceanic chemocline during the Permian-Triassic transition

Photic zone euxinia during the Permian-triassic superanoxic event.

Carbon and sulfur isotopic data, together with biomarker and iron speciation analyses of the Hovea-3 core that was drilled in the Perth Basin, Western Australia, indicate that euxinic conditions prevailed in the paleowater column during the Permian-Triassic superanoxic event. Biomarkers diagnostic for anoxygenic photosynthesis by Chlorobiaceae are particularly abundant at the boundary and into ...

Two pulses of oceanic environmental disturbance during the Permian–Triassic boundary crisis

a State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, Hubei, 430074, PR China b State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, Hubei, 430074, PR China c Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, USA d Department Geology and Geophysics, Yale University,...

An extraterrestrial impact at the Permian-Triassic boundary?

Becker et al. (1) presented geochemical evidence that suggests that the largest mass extinction in Earth history, at the PermianTriassic boundary (PTB) 250 million years ago (Ma), coincided with an extraterrestrial impact comparable in size to the one that likely caused the end-Cretaceous extinctions 65 Ma (2). Although Becker et al. analyzed material from sections in Hungary, Japan, and China,...

Planetary Gases and Fullerenes at the Permian-triassic Boundary

The Permian–Triassic boundary crisis and Early Triassic biotic recovery

This issue of Palaeogeography Palaeoclimatology Palaeoecology is devoted to papers on the Permian– Triassic boundary crisis and Early Triassic biotic recovery. It is an outgrowth of the Symposium on Early Triassic Chronostratigraphy and Biotic Recovery that was held in Chaohu, China, on May 21st–23rd, 2005 under the auspices of IGCP Project 467 and attended by about 200 Earth scientists with a ...