Of, belonging to, or being the geologic time, system of rocks, and sedimentary deposits of the fifth period of the Paleozoic Era, characterized by the submergence of extensive land areas under shallow seas.

• 密西西比的属于或处于古生代第五世的地质年代的、或该年代的岩石系统的或沉积物的，这一地质时代以大量陆地沉入浅海为特征