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 26 250 A QUATERNARY 54.5 83.0 NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS 26 250 A UPPER PLIOCENE 111.5 121.0 NO AGE GIVEN NO AGE GIVEN 1.8 3.4 2.6 DSDP INITIAL REPORTS 26 250 A UPPER PLIOCENE 149.5 159.0 NO AGE GIVEN NO AGE GIVEN 1.8 3.4 2.6 DSDP INITIAL REPORTS 26 250 A LOWER PLIOCENE 235.0 236.5 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 26 250 A UPPER MIOCENE 236.5 358.5 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 26 250 A MIDDLE MIOCENE LOWER MIOCENE 463.0 472.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 10.5 22.5 16.5 DSDP INITIAL REPORTS 26 250 A MIDDLE MIOCENE LOWER MIOCENE 567.0 577.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 10.5 22.5 16.5 DSDP INITIAL REPORTS 26 250 A LOWER MIOCENE 634.0 643.5 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 DSDP INITIAL REPORTS 26 250 A CONIACIAN 691.0 710.0 NO AGE GIVEN NO AGE GIVEN 82 86 84 DSDP INITIAL REPORTS