The oxygen content of the Earth's surface environment is thought to have increased in two
broad steps: the Great Oxygenation Event (GOE) around the Archean–Proterozoic boundary …

The burial of organic matter (OM) in marine sediments represents the major link between
“active” surface pools of carbon in the oceans, atmosphere, on land, and in marine …

This paper is a synthesis of the use of selected trace elements as proxies for reconstruction
of paleoproductivity and paleoredox conditions. Many of the trace elements considered here …

The composition of sulfur isotopes in sedimentary sulfides and sulfates traces the sulfur
cycle throughout Earth's history. In particular, depletions of sulfur-34 (34S) in sulfide relative …

For more than a decade I have taught a graduate-level course in marine sediment
geochemistry that covers many of the topics discussed in this book. The goal now is to …

Long-term secular variation in seawater sulfate concentrations ([SO 4 2−] SW) is of interest
owing to its relationship to the oxygenation history of Earth's surface environment. In this …

An abrupt transition from oxic to anoxic–sulfidic (euxinic) marine bottom waters occurred in
the Cariaco Basin in response to increasing productivity resulting from the late Pleistocene …

Stable isotope ratios of sulfur (δ34S) and oxygen (δ18O) in marine sulfate respond to
changes in fluxes and processes in the global sulfur cycle. The two isotope systems respond …

Sulfur isotope fractionation during dissimilatory sulfate reduction has been conceptually
described by the widely accepted Rees model as related to the stepwise reduction of sulfate …

Volcanism is a dominant natural source of mercury (Hg) to the atmosphere, biosphere,
ocean and sediments. In recent years, sedimentary Hg contents have emerged as a tool to …