"Ocean anoxic events occur in part as a consequence ... An expert on ancient climates, Sageman is a professor of Earth, Environmental and Planetary Sciences at Northwestern's Weinberg College ...
researchers have precisely refined the timing and duration of Ocean Anoxic Event 1a (OAE 1a), an extreme environmental disruption that choked oxygen from Earth’s oceans to cause significant ...
Earth's iron cycle is a very complex biogeochemical ... These microbes prefer the oxic-anoxic transition zone (OATZ) where oxygenated water (or sediment) meets oxygen-deficient water (or sediment).