The Missing Time Calculation of the Hiatus Surface: A Case Study of the Upper Permian Reef Section the Platform Margin, Ziyun, Guizhou

Taken as an example the Upper Permian reef section on the carbonate platform margin at Ziyun, Guizhou, the paper discusses the missing time of a hiatus surface, an important problem in chemical sequence stratigraphy, with the concept of cosmic chemistry. Then the paper proposes a series of new concepts for chemical sequence stratigraphy, including the condensation surface, relative compaction factor and time missing factor. Finally a quantitative curve of Late Permian relative sea–level change in the Ziyun area is presented with time coordinates.