Clint Scott

TL;DR: A new perspective on ocean oxygenation is presented based on the authigenic accumulation of the redox-sensitive transition element molybdenum in sulphidic black shales, which reflects a greatly expanded oceanic reservoir due to oxygenation of the deep ocean and corresponding decrease in sulphide conditions in the sediments and water column.

TL;DR: In this article, the authors present a discussion of the Mo geochemistry of non-euxinic sediments, where hydrogen sulfide is sometimes present yet always restricted to pore waters.

TL;DR: The data provide evidence for an early Ediacaran oxygenation event, which pre-dates the previous estimates for post-Marinoan oxygenation by more than 50 million years, and seem to support a link between the most severe glaciations in Earth’s history, the oxygenation of the Earth's surface environments, and the earliest diversification of animals.

TL;DR: In this paper, a combination of indirect numerical modeling methods and more direct geochemical proxies is used to constrain the distributions of anoxic and H2S-containing (euxinic) water on a global scale.

TL;DR: A study of the redox sensitive element, uranium, in organic-rich shales to track the history of Earth's surface oxidation at an unprecedented temporal resolution is presented in this article.