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 84 569 RECENT UPPER PLEISTOCENE 0.0 1.2 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0 0.7 0.35 DSDP INITIAL REPORTS 84 569 PLEISTOCENE 1.2 49.7 NO AGE GIVEN NO AGE GIVEN 0.011 1.8 .9055 DSDP INITIAL REPORTS 84 569 PLEISTOCENE UPPER PLIOCENE 49.7 58.9 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0.011 3.4 1.706 DSDP INITIAL REPORTS 84 569 MIDDLE MIOCENE 77.9 87.4 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS 84 569 LOWER MIOCENE 87.4 241.0 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 DSDP INITIAL REPORTS 84 569 UPPER OLIGOCENE 241.0 250.7 NO AGE GIVEN NO AGE GIVEN 22.5 30 26.25 DSDP INITIAL REPORTS