The case for a Neoproterozoic Oxygenation Event: Geochemical evidence and biological consequences

[摘要] The Neoproterozoic era marked a turningpoint in the development of the modern earth system. The irreversibleenvironmental changes of that time were rooted in tectonic upheavals that drovechain reactions between the oceans, atmosphere, climate, and life. Keybiological innovations took place amid carbon cycle instability that pushedclimate to unprecedented extremes and resulted in the ventilation of the deepocean. Despite a dearth of supporting evidence, it is commonly presumed that arise in oxygen triggered the evolution of animals. Although geochemicalevidence for oxygenation is now convincing, our understanding of theNeoproterozoic earth system and of early animal evolution has changed apace,revealing an altogether more complicated picture in which the spread of anoxiaplayed an important role. The challenge to future researchers lies inunraveling the complex entanglement of earth system changes during this pivotalepisode in Earth?s history.

[学科分类] 地质学

[关键词] Fire safety;fatal fires;smoke alarms