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 33 317 A UPPER MIOCENE 402.0 402.7 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 33 317 A MIDDLE EOCENE 402.7 411.5 NO AGE GIVEN NO AGE GIVEN 43 49 46 DSDP INITIAL REPORTS 33 317 A LOWER EOCENE 554.0 554.6 NO AGE GIVEN NO AGE GIVEN 49 53.5 51.25 DSDP INITIAL REPORTS 33 317 A MIDDLE MAESTRICHTIAN 554.6 573.0 NO AGE GIVEN NO AGE GIVEN 66 67 66.5 DSDP INITIAL REPORTS 33 317 A MIDDLE MAESTRICHTIAN UPPER CAMPANIAN 573.0 576.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 66 74 70 DSDP INITIAL REPORTS 33 317 A LOWER MAESTRICHTIAN UPPER CAMPANIAN 576.0 582.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 67.5 74 70.75 DSDP INITIAL REPORTS 33 317 A MIDDLE CAMPANIAN 582.5 592.0 NO AGE GIVEN NO AGE GIVEN 72 76 74 DSDP INITIAL REPORTS 33 317 A SANTONIAN LOWER CENOMANIAN 592.0 601.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 78 100 89 DSDP INITIAL REPORTS 33 317 A CENOMANIAN UPPER ALBIAN 601.5 611.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 92 104 98 DSDP INITIAL REPORTS 33 317 A MIDDLE ALBIAN 611.0 620.5 NO AGE GIVEN NO AGE GIVEN 104 106 105 DSDP INITIAL REPORTS 33 317 A APTIAN BARREMIAN 620.5 630.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 108 121 114.5 DSDP INITIAL REPORTS 33 317 A UPPER APTIAN 630.0 644.0 A LEGITIMATE AGE INVERSION NO AGE GIVEN NO AGE GIVEN 108 112 110 DSDP INITIAL REPORTS 33 317 A LOWER APTIAN 644.0 649.0 NO AGE GIVEN NO AGE GIVEN 112 115 113.5 DSDP INITIAL REPORTS 33 317 A APTIAN BARREMIAN 649.0 677.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 108 121 114.5 DSDP INITIAL REPORTS