leg site hole age mnemonic auxiliary age mnemonic top of section depth(m) bottom of section depth(m) special condition age auxiliary age averaged age age top of section(million years) age bottom of section(million years) average age(million years)t data source 61 462 A UPPER MIOCENE MIDDLE MIOCENE 78.5 88.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 5 16 10.5 DSDP INITIAL REPORTS 61 462 A LOWER OLIGOCENE UPPER EOCENE 249.5 373.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 30 43 36.5 DSDP INITIAL REPORTS 61 462 A MIDDLE EOCENE 373.0 401.5 NO AGE GIVEN NO AGE GIVEN 43 49 46 DSDP INITIAL REPORTS 61 462 A LOWER EOCENE 411.0 430.0 NO AGE GIVEN NO AGE GIVEN 49 53.5 51.25 DSDP INITIAL REPORTS 61 462 A MIDDLE MAESTRICHTIAN 439.5 449.0 NO AGE GIVEN NO AGE GIVEN 66 67 66.5 DSDP INITIAL REPORTS 61 462 A LOWER MAESTRICHTIAN UPPER CAMPANIAN 449.0 487.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 67.5 74 70.75 DSDP INITIAL REPORTS 61 462 A UPPER CAMPANIAN 487.0 500.8 NO AGE GIVEN NO AGE GIVEN 70 74 72 DSDP INITIAL REPORTS 61 462 A LOWER CAMPANIAN 500.8 525.0 NO AGE GIVEN NO AGE GIVEN 74 78 76 DSDP INITIAL REPORTS 61 462 A UPPER SANTONIAN 534.5 544.0 NO AGE GIVEN NO AGE GIVEN 78 80 79 DSDP INITIAL REPORTS 61 462 A CENOMANIAN UPPER ALBIAN 544.0 563.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 92 104 98 DSDP INITIAL REPORTS 61 462 A UPPER APTIAN 702.9 711.0 NO AGE GIVEN NO AGE GIVEN 108 112 110 DSDP INITIAL REPORTS 61 462 A BARREMIAN HAUTERIVIAN 723.0 998.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 115 126 120.5 DSDP INITIAL REPORTS