The global sea-level changes during the Permian

The authors in this paper suggest, based on the previous date of Permian sediments, sequences and biostratigraphy in conjunction with worldwide sequence division and correla-tion, that there are at least six eustatic sea level events during the Permian which can be traced or correlated all over the world, Generally speaking, the Permian parts of Phanero-zoic eustatic sea-level cycle curves include two patterns or branches:the one is the so-called classical or Euramerican type which represents the overall sea-level fall characteristic of marine-nonmarine regressive successions, the other is defined as the Tethyan or South Chi-na type which points to the overall sea-level rise characteristic of transgressive carbonate rock or carbonate-siliceous rock successions. The eustatic sea-level curves mentioned above are closely related to the global tectonic and palaeogeographic frameworks.