Noun
severe hypoxia; absence of oxygen in inspired gases or in arterial blood or in the tissues
Source: WordNetAnoxia seeAlso Evidence for widespread ocean anoxia (severe deficiency of oxygen) and euxinia (presence of hydrogen sulfide ) is found from the Late Permian to the Early Triassic. Source: Internet
For such iron-rich rocks to be deposited there would have to be anoxia in the ocean, so that much dissolved iron (as ferrous oxide ) could accumulate before it met an oxidant that would precipitate it as ferric oxide. Source: Internet
Hypercapnia best explains the selectivity of the extinction, but anoxia and euxinia probably contributed to the high mortality of the event. Source: Internet
Once anoxia became established, it would have been sustained by a positive feedback loop because deep water anoxia tends to increase the recycling efficiency of phosphate, leading to even higher productivity. Source: Internet