publication . Doctoral thesis . 2014

Carbon cycling and mass extinctions: the Permo-Triassic of the Arabian Margin

Clarkson, Matthew Oliver;
Open Access English
  • Published: 30 Jun 2014
  • Publisher: The University of Edinburgh
  • Country: United Kingdom
Abstract
The end-Permian extinction at 252 Ma is widely regarded as the most severe of the Phanerozoic mass-extinctions and enabled the evolution of the modern carbon cycle and ecosystem structure. The cause of the extinction is still debated but the synergistic pressures of global climate change, such as anoxia and ocean acidification, were clearly important. The extinction occurred in two phases and is marked by a uniquely protracted recovery period of ~ 5 Myrs where diversity fails to reach pre-extinction levels until the Middle Triassic. This period is characterized by an unstable global carbon cycle, secondary extinctions, reef, chert and coal gaps, and changes in t...
Subjects
free text keywords: Permian, Triassic, anoxia, acidification, carbon cycle
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