The stratigraphic complexity of the middle Ediacaran carbon isotopic record in the Yangtze Gorges area, South China, and its implications for the age and chemostratigraphic significance of the Shuram excursion
The Miaohe Member is equivalent to the upper part of the Doushantuo Member IV. The δ13C record in the upper Doushantuo Formation is incomplete in the Jiulongwan section. The EN3/Shuram excursion may be significantly older than 551 Ma.