stratigraphic intervals
Count: [*†*] 2; †295
   (System) †Jurassic (201.3 - 145.0 Ma)
  Count: [†*] †37
     (Series) †Lower (201.3 - 174.1 Ma)
    Count: [†*] †12
       (Stage) †Sinemurian (199.3 - 190.8 Ma)
      Count: [†*] †2
         (Substage) †upper
        Count: -