Phytoplankton productivity and export sequester climatically significant quantities of
atmospheric carbon dioxide as particulate organic carbon through a suite of processes …

Thallium (Tl) is a potential toxicity element that poses significant ecological and
environmental risks. Recently, a substantial amount of Tl has been released into the …

For this study, we generated thallium (Tl) isotope records from two anoxic basins to track the
earliest changes in global bottom water oxygen contents over the Toarcian Oceanic Anoxic …

Late Archaean sedimentary rocks contain compelling geochemical evidence for episodic
accumulation of dissolved oxygen in the oceans along continental margins before the Great …

The rates of marine deoxygenation leading to Cretaceous Oceanic Anoxic Events are poorly
recognized and constrained. If increases in primary productivity are the primary driver of …

Iron is a remarkable element in its relatively high abundance for its mass and its sensitivity to
(and control of) redox on a planetary scale over geologic time. Numerous volumes have …

The initial rise of molecular oxygen (O2) shortly after the Archaean–Proterozoic transition 2.5
billion years ago was more complex than the single step-change once envisioned. Sulfur …

The timing and connections between global cooling, marine redox conditions, and biotic
turnover are underconstrained for the Late Ordovician. The second most severe mass …

Thallium is a highly poisonous heavy metal. Since Tl pollution control has been neglected
worldwide until the present, countless Tl pollutants have been discharged into the …

Ocean dissolved oxygen (DO) can provide insights on how the marine carbon cycle affects
global climate change. However, the net global DO change and the controlling mechanisms …