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 40 360 LOWER PLIOCENE 79.5 89.0 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 40 360 UPPER MIOCENE 89.0 212.5 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 40 360 UPPER MIOCENE MIDDLE MIOCENE 212.5 231.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 5 16 10.5 DSDP INITIAL REPORTS 40 360 MIDDLE MIOCENE 231.5 326.5 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS 40 360 LOWER MIOCENE 336.0 396.0 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 DSDP INITIAL REPORTS 40 360 UPPER OLIGOCENE 396.0 414.5 NO AGE GIVEN NO AGE GIVEN 22.5 30 26.25 DSDP INITIAL REPORTS 40 360 UPPER OLIGOCENE MIDDLE OLIGOCENE 414.5 421.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 22.5 32 27.25 DSDP INITIAL REPORTS 40 360 MIDDLE OLIGOCENE 431.0 478.5 NO AGE GIVEN NO AGE GIVEN 29 32 30.5 DSDP INITIAL REPORTS 40 360 MIDDLE OLIGOCENE LOWER OLIGOCENE 488.0 497.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 29 37.5 33.25 DSDP INITIAL REPORTS 40 360 LOWER OLIGOCENE 507.0 567.0 NO AGE GIVEN NO AGE GIVEN 30 37.5 33.75 DSDP INITIAL REPORTS 40 360 UPPER EOCENE 567.0 659.0 NO AGE GIVEN NO AGE GIVEN 37.5 43 40.25 DSDP INITIAL REPORTS 40 360 UPPER EOCENE MIDDLE EOCENE 668.5 678.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 37.5 49 43.25 DSDP INITIAL REPORTS 40 360 MIDDLE EOCENE 678.0 839.5 NO AGE GIVEN NO AGE GIVEN 43 49 46 DSDP INITIAL REPORTS