Suboxic-dominated conditions in the Ediacaran shallow ocean: Geochemistry of pelitic siltstones in the Doushantuo Formation, South China

The Ediacaran witnessed a significant oxygenation of the Earth's surface in line with the emergence and diversification of early animals, but the redox conditions of the shallow waters during this period are still uncertain. Here, we present geochemical profiles from neritic pelitic siltstones of the Doushantuo Formation at the village of Xiaoyang on the northwestern margin of the Yangtze Platform in South China. Most sediments show moderate to...