Fauna Replacement Event of the Middle and Late Permian inthe West Qinling MountainsZeng Xuelu and Gao Jinhan(China University of Geosciences, Beijing 100083)The middle and late Permian faunas from the west QinlingMountains have suffered a replacement event during thedeveloping history. It behaves that the fusulinids occurring fromthe bottom of the late Maokouan Dieshan Formation of the middlePermian were sharply reduced or disappeared, and thebrachiopods were prosperously developed. T…