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 29 283 MIDDLE PLEISTOCENE UPPER PLIOCENE 0.0 0.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0.8 3.4 2.1 DSDP INITIAL REPORTS 29 283 PLIOCENE MIOCENE 10.0 19.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 1.8 22.5 12.15 DSDP INITIAL REPORTS 29 283 UPPER EOCENE 19.0 162.0 NO AGE GIVEN NO AGE GIVEN 37.5 43 40.25 DSDP INITIAL REPORTS 29 283 UPPER EOCENE MIDDLE EOCENE 190.5 247.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 37.5 49 43.25 DSDP INITIAL REPORTS 29 283 MIDDLE EOCENE 276.0 285.5 NO AGE GIVEN NO AGE GIVEN 43 49 46 DSDP INITIAL REPORTS 29 283 MIDDLE EOCENE UPPER PALEOCENE 323.5 325.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 43 60 51.5 DSDP INITIAL REPORTS 29 283 PALEOCENE 325.0 580.0 NO AGE GIVEN NO AGE GIVEN 53.5 65 59.25 DSDP INITIAL REPORTS