linguistic:paraphrasing
Chronology

The Mississippian stage is usually divided into three or more chronological periods. Each period is an arbitrary historical distinction varying regionally. At a particular site, each period may be considered to begin earlier or later, depending on the speed of adoption or development of given Mississippian traits. The "Mississippian period" should not be confused with the "Mississippian culture". The Mississippian period is the chronological stage, while Mississippian culture refers to the cultural similarities that characterize this society.