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 …

Abstract The Neoproterozoic era (about 1,000 to 542 million years ago) was a time of
turbulent environmental change. Large fluctuations in the carbon cycle were associated with …

Chemostratigraphy has diverse applications to investigating the rock record, such as
reconstructing paleoenvironments, determining the tectonic setting of sedimentary basins …

The Neoproterozoic era marked a turning point in the development of the modern earth
system. The irreversible environmental changes of that time were rooted in tectonic …

Organic carbon productivity and formation of hydrocarbon source rocks during the Early
Precambrian was almost exclusively the product of the growth of microbial mats. Indirect …

Eukaryotic life has likely existed since the late Paleoproterozoic, yet little is known about its
early diversity and phylogenetic relationships. Organic-walled microfossils (OWMs) with …

The early to mid-Neoproterozoic (pre-glacial) sedimentary succession of the Lena-Anabar
Basin, northeast Siberian Platform, records protracted faulting and subsidence, possibly as …

Multiple eukaryotic clades make their first appearance in the fossil record between~ 810 and
715Ma. Molecular clock studies suggest that the origin of animal multicellularity may have …

The redox structure of the water column in anoxic basins through geological time remains
poorly resolved despite its importance to biological evolution/extinction and biogeochemical …

Earth's marine nitrogen cycle has co-evolved with life and redox conditions over geological
time. In this Review, we provide an account of nitrogen cycling in the world's oceans over the …