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 38 339 PLEISTOCENE 0.0 55.5 NO AGE GIVEN NO AGE GIVEN 0.011 1.8 .9055 DSDP INITIAL REPORTS 38 339 PLEISTOCENE PLIOCENE 55.5 74.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0.011 5 2.506 DSDP INITIAL REPORTS 38 339 MIDDLE OLIGOCENE LOWER OLIGOCENE 74.5 108.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 29 37.5 33.25 DSDP INITIAL REPORTS