| Zitai Formation | |
| Type: | Geological formation |
| Period: | Dapingian |
| Age: | Floian-Dapingian ~ |
| Prilithology: | Limestone |
| Region: | Anhui, Hubei, Hunan |
| Coordinates: | 30.3°N 117.4°W |
| Paleocoordinates: | 8.7°N -134.3°W |
The Zitai or Zhitai Formation[1] [2] is a geological sequence of Middle Ordovician origin, that occurs along the southeastern edge of the Yangtze Platform in southern China. It is a purple-red limestone with a few interspersed yellow-green shale beds. It contains a fossil fauna dominated by trilobites and nautiloids.