"global chronostratigraphic units" Count: 5e; †118;85e †Precambrian (4600 - 541.0 Ma) Count: †4;21e 1 (Era) †Hadean Era see Eon Hadean Eon (4600 - 4000 Ma) Count: †5e 2 (Era) †Isuan Era Count: - 3 (Era) †Swazian Era Count: - 4 (Era) †Randian Era Count: - 5 (Era) †Huronian Era Count: - 6 (Era) †Animikean Era Count: †1e 7 (Era) †Riphean Era Count: [†*] †3e 8 (Era) †Sinian Era Count: [†*] †4;4e