THE CORRELATION OF THE PERMIAN–TRIASSIC TRANSITIONAL BEDS AND MASS EXTINCTION IN CONTINENTAL-MARINE SILICICLASTIC SETTINGS OF WESTERN GUIZHOU AND EASTERN YUNNAN, SOUTHWESTERN CHINA

2018 ◽  
Author(s):  
Daoliang Chu ◽  
◽  
Jinnan Tong ◽  
Michael J. Benton ◽  
Haijun Song
Keyword(s):  
Mass Extinction ◽  
Southwestern China ◽  
Western Guizhou

scholarly journals Metal-induced stress in survivor plants following the end-Permian collapse of land ecosystems

Geology ◽  
2021 ◽  
Author(s):  
Daoliang Chu ◽  
Jacopo Dal Corso ◽  
Wenchao Shu ◽  
Song Haijun ◽  
Paul B., Wignall ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Mass Extinction ◽  
Metal Toxicity ◽  
Southwestern China ◽  
Spores And Pollen ◽  
Metal Concentrations ◽  
Significant Peak ◽  
Coal Beds ◽  
Induced Stress ◽  
Tropical Peatlands

Teratological spores and pollen are widespread in sediments that record the Permian- Triassic mass extinction. The malformations are thought to be the result of extreme environmental conditions at that time, but the mutagenic agents and the precise timing of the events remain unclear. We examined the abundance of teratological sporomorphs and metal concentrations in a Permian-Triassic tropical peatland succession of southwestern China. We find a significant peak of spore tetrads of lycopsid plants (as much as 19% of all sporomorphs) coeval with increases in Cu and Hg concentrations above the main terrestrial extinction interval, which marks the loss of Permian Gigantopteris forests, increased wildfire activity, and the disappearance of coal beds. Thus, in tropical peatlands, mutagenesis affected only surviving plants. Mutagenesis was likely caused by metal toxicity, linked to increased Hg and Cu loading, but was not itself a direct cause of the terrestrial crisis.

High-resolution terrestrial Permian–Triassic eventostratigraphic boundary in western Guizhou and eastern Yunnan, southwestern China

2005 ◽  
Vol 215 (3-4) ◽  
pp. 285-295 ◽  
Author(s):  
Yuanqiao Peng ◽  
Suxin Zhang ◽  
Tianxin Yu ◽  
Fengqing Yang ◽  
Yongqun Gao ◽  
...  
Keyword(s):  
High Resolution ◽  
Southwestern China ◽  
Western Guizhou

Coal-fired trigger of mass extinction

Nature ◽  
2011 ◽  
Author(s):  
Gayathri Vaidyanathan
Keyword(s):  
Mass Extinction
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