但是，当大规模的火山作用向海洋输送了更多磷时，就改变了可用的磷数量，从而导致那些缺氧事件。
But when massive volcanism delivered more, it changed the amount of phosphorous available, and drove these anoxic events.
富有机质黑色页岩的形成长期以来被认为是缺氧沉积环境的证据，并被作为全球缺氧事件的标志。
Black shales have been considered as a sign of anoxic depositional environments and anoxic events for a long time.
然而，这项新的研究推出的另一种理论指出，其责任在于发生在9450万年以前所谓海洋缺氧事件之前五十万年间的硫磺的累积。
However, the new study poses an alternative theory, that a build-up of sulphur in the half million years before the so-called Ocean Anoxic Event that occurred 94.5.
通过研究对沟鞭藻所反映的古环境变迁进行了详细分析 ，证实在森诺曼 土仑期本区明显受到了全球缺氧事件的影响。
Other semiquantitative data related to the palaeoenvironments also show dramatic changes, indicating that fluctuations were obviously influenced by Oceanic Anoxic Events.
松辽盆地白垩纪出现多期缺氧地质事件，它与全球白垩纪的地质事件相对应。
Corresponding to the Cretaceous global events, there are several times of anoxic events in the Songliao Basin.
松辽盆地白垩纪出现多期缺氧地质事件，它与全球白垩纪的地质事件相对应。
Corresponding to the Cretaceous global events, there are several times of anoxic events in the Songliao Basin.
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