Few topics in geobiology have been as extensively debated as the role of Earth's
oxygenation in controlling when and why animals emerged and diversified. All currently …

Abstract Otavi Group is a 1.5–3.5-km-thick epicontinental marine carbonate succession of
Neoproterozoic age, exposed in an 800-km-long Ediacaran− Cambrian fold belt that rims …

The rise of complex macroscopic life occurred during the Ediacaran Period, an interval that
witnessed large-scale disturbances to biogeochemical systems. The current Ediacaran …

The evolution of the global carbon and silicon cycles is thought to have contributed to the
long-term stability of Earth's climate,–. Many questions remain, however, regarding the …

Abstract The Ediacaran Shuram carbon isotope excursion (CIE) follows the regional
Gaskiers glaciation and occurs before the appearance of macroscopic animal fossils …

The geochemistry of the carbonate sedimentary record is invaluable for understanding the
ancient seawater evolution of carbon and redox-sensitive elements. However, the …

The transition from the terminal Ediacaran to early Cambrian (ca. 550–530 Ma) witnessed
both the decline of Ediacaran-type soft-bodied and skeletal biota and the rapid …

Anoxic and iron-rich (ferruginous) conditions prevailed in the ocean under the low-oxygen
atmosphere that occurred through most of the Archean Eon. While euxinic conditions (ie …

Measurements of triple oxygen isotope ratios in barite horizons within post-Marinoan cap
carbonates have provided some of the most compelling evidence that the Marinoan …

Carbonate minerals have precipitated from seawater for at least the last 3.8 billion years, but
changes in the physical and chemical properties of carbonate rocks demonstrate that the …