"global chronostratigraphic units"
   (Eon) Phanerozoic Eon (541.0 Ma - present)
     (Era) †Mesozoic Era (252.17 - 66.0 Ma)
       (Period) †Cretaceous Period (145.0 - 66.0 Ma)
         (Epoch) †Early Cretaceous Epoch (145.0 - 100.5 Ma)
           1 (Stage) †Berriasian Stage (145.0 - 139.8 Ma)
           2 (Stage) †Valanginian Stage (139.8 - 132.6 Ma)
           3 (Stage) †Hauterivian Stage (132.6 - 129.4 Ma)
           4 (Stage) †Barremian Stage (129.4 - 125.0 Ma)
           5 (Stage) †Aptian Stage (125.0 - 113.0 Ma)
           6 (Stage) †Albian Stage (113.0 - 100.5 Ma)