"global chronostratigraphic units"
   (Eon) Phanerozoic Eon (541.0 Ma - present)
     (Era) †Mesozoic Era (252.17 - 66.0 Ma)
       (Period) †Jurassic Period (201.3 - 145.0 Ma)
         (Epoch) †Malm Epoch
           1 (Stage) †Oxfordian Stage (163.5 - 157.3 Ma)
           2 (Stage) †Kimmeridgian Stage (157.3 - 152.1 Ma)
           3 (Stage) †Tithonian Stage (152.1 - 145.0 Ma)