stratigraphic intervals
   (System) †Cretaceous (145.0 - 66.0 Ma)
     (Series) †Upper (100.5 - 66.0 Ma)
       (Subseries) †Gallic
         1 (Stage) †Turonian (93.9 - 89.8 Ma)
         2 (Stage) †Cenomanian (100.5 - 93.9 Ma)