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 secular trend of seawater strontium isotope ratio (87 Sr/86 Sr) reflects changes in the
relative contributions of continental versus mantle reservoirs to ocean composition, and …

An improved and updated version of the statistical LOWESS fit to the marine 87Sr/86Sr
record and a revised look-up table (V3: 10/99; available from j. mcarthur@ ucl. ac. uk) based …

The recent proliferation of stratigraphic studies of δ13C variation in carbonates and organic
C in later Neoproterozoic and basal Cambrian successions (∼ 850-530 Ma) indicates a …

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 …

Atmospheric CO 2 levels and global climate are regulated on geological timescales by the
silicate weathering feedback. However, this thermostat has failed multiple times in Earth's …

The ever-changing distribution of continents and ocean basins on Earth is fundamental to
the environment of the planet. Recent ideas regarding pre-Pangea geography and tectonics …

The first book to review all the evidence concerning both the dinosaur extinctions and all the
other major extinctions-of plant, animal, terrestrial, and marine life-in the history of life. All the …

Abstract The Ediacaran-Cambrian transition, which incorporates the radiation of animals,
lacks a robust global temporal and spatial framework, resulting in major uncertainty in the …

Stable oxygen and carbon isotope measurements on biogenic calcite and aragonite have
become standard tools for reconstructing past oceanographic and climatic change. In …