stratigraphic intervals
Count: [*†*] 2; †295
   (System) †Cretaceous (145.0 - 66.0 Ma)
  Count: [†*] †42
     1 (Series) †Upper (100.5 - 66.0 Ma)
    Count: [†*] †20
     3 (Series) †Lower (145.0 - 100.5 Ma)
    Count: [†*] †20