Characteristics and Formation Process of Nodules from Yanjiahe Formation, Terreneuvian of the Three Gorge Area, South China
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2010-08-10
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Key words:
- siliceousphosphatic nodules
Abstract: This paper reports siliceousphosphatic nodules from the Yanjiahe Formation, Terreneuvian in Three Gores area, Hubei province, South China. The results of XRD show phosphatic contents are higher in interior and siliceous contents are higher in exterior of the nodules. The nodules' interior shows loose texture, and abundant Cyanobacteria and diverse Small Shelly Fossils are found in siliceousphosphatic nodules. It indicates Cyanobacteria and SSFs play an important part in formation process of nodules. Under the regulating action of microorganisms, siliceousphosphatic nodules were formed gradually along with the mediums' change of physicchemical condition.
Citation: | GUO Junfeng. Characteristics and Formation Process of Nodules from Yanjiahe Formation, Terreneuvian of the Three Gorge Area, South China[J]. Acta Sedimentologica Sinica, 2010, 28(4): 676-681. |