"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) †Lias Epoch (Stage) †Sinemurian Stage (199.3 - 190.8 Ma)