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Toward a Neoproterozoic composite carbon-isotope record
Glacial deposits of Sturtian and Marinoan age occur in the well-studied Neoproterozoic successions of northern Namibia, South Australia, and northwestern Canada. In all three regions, the MarinoanExpand
Evolution of the 87Sr/86Sr composition of Neoproterozoic seawater
Abstract The limited availability and low resolution of biostratigraphic and radiometric data in the Precambrian necessitate using marine chemostratigraphy to correlate and integrate the fragmentaryExpand
Neoproterozoic glaciations in a revised global palaeogeography from the breakup of Rodinia to the assembly of Gondwanaland
Abstract This review paper presents a set of revised global palaeogeographic maps for the 825–540 Ma interval using the latest palaeomagnetic data, along with lithological information forExpand
On the initiation of a snowball Earth
[1] The Snowball Earth hypothesis explains the development of glaciation at low latitudes in the Neoproterozoic, as well as the associated iron formations and cap carbonates, in terms of a runawayExpand
Statistical analysis of iron geochemical data suggests limited late Proterozoic oxygenation
This re-analysis of trace-metal data is consistent with oxygenation continuing well into the Palaeozoic era, and suggests that subsurface water masses in mid-Proterozoic oceans were predominantly anoxic and ferruginous, but with a tendency towards euxinia (sulfide-bearing) that is not observed in the Neoproterozoics era. Expand
Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective
Abstract The end of the Neoproterozoic Era (1000 to 541 Ma) is widely believed to have seen the transition from a dominantly anoxic to an oxygenated deep ocean. This purported redox transitionExpand
Cryogenian Glaciation and the Onset of Carbon-Isotope Decoupling
Carbonate and organic matter carbon-isotope data are presented that demonstrate no decoupling from approximately 820 to 760 million years ago and complete decoupled between the Sturtian and Marinoan glacial events of the Cryogenian Period (approximately 720 to 635 million years old). Expand
The stratigraphic relationship between the Shuram carbon isotope excursion, the oxygenation of Neoproterozoic oceans, and the first appearance of the Ediacara biota and bilaterian trace fossils in
Abstract A mechanistic understanding of relationships between global glaciation, a putative second rise in atmospheric oxygen, the Shuram carbon isotope excursion, and the appearance ofExpand
Comings and Goings of Global Glaciations on a Neoproterozoic Tropical Platform in Namibia
An enduring enigma of Neoproterozoic Earth history is the intimate association of glacial diamictites with typical warm-water carbonates. Among the many hypothesized explanations for thisExpand