Nitrogen is an essential nutrient for all life on Earth and it acts as a major control on
biological productivity in the modern ocean. Accurate reconstructions of the evolution of life …

We comprehensively compile and review N content in geologic materials to calculate a new
N budget for Earth. Using analyses of rocks and minerals in conjunction with N–Ar …

Construction and assembly of the Geologic Time Scale involves:(a) constructing a relative
(chronostratigraphic) standard scale for key periods in the Earth's rock record;(b) identifying …

Nitrogen is an essential nutrient for all organisms that must have been available since the
origin of life. Abiotic processes including hydrothermal reduction, photochemical reactions …

The colonization of emergent continental landmass by microbial life was an evolutionary
step of paramount importance in Earth history. Here we report direct fossil evidence for life …

This article examines the geological evidence for the rise of atmospheric oxygen and the
origin of oxygenic photosynthesis. The evidence for the rise of atmospheric oxygen places a …

Nitrogen isotope compositions in sedimentary rocks (d 15 N sed) are routinely used for
reconstructing Cenozoic N-biogeochemical cycling and are also being increasingly applied …

The Great Oxidation Event (GOE) is one of the most significant changes in seawater and
atmospheric chemistry in Earth history. This rise in oxygen occurred between ca. 2.4 and 2.3 …

The distribution of major phosphate deposits in the Precambrian sedimentary rock record is
restricted to periods that witnessed global biogeochemical changes, but the cause of this …

Proterozoic sedimentary successions of India are important archives of both the tectonic
history of the Indian subcontinent and the geochemical evolution of Earth surface processes …