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 19 183 UPPER PLEISTOCENE 0.0 12.0 NO AGE GIVEN NO AGE GIVEN 0.01 0.7 0.355 DSDP INITIAL REPORTS 19 183 MIDDLE PLEISTOCENE 12.0 59.0 NO AGE GIVEN NO AGE GIVEN 0.8 1.2 1 DSDP INITIAL REPORTS 19 183 LOWER PLEISTOCENE 59.0 87.0 NO AGE GIVEN NO AGE GIVEN 1.2 1.8 1.5 DSDP INITIAL REPORTS 19 183 UPPER PLIOCENE 99.0 123.5 NO AGE GIVEN NO AGE GIVEN 1.8 3.4 2.6 DSDP INITIAL REPORTS 19 183 LOWER PLIOCENE 123.5 146.0 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 19 183 UPPER MIOCENE 146.0 183.0 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 19 183 MIDDLE MIOCENE 183.0 210.0 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS 19 183 OLIGOCENE 239.0 248.0 NO AGE GIVEN NO AGE GIVEN 22.5 37.5 30 DSDP INITIAL REPORTS 19 183 LOWER OLIGOCENE 248.0 425.0 NO AGE GIVEN NO AGE GIVEN 30 37.5 33.75 DSDP INITIAL REPORTS 19 183 LOWER OLIGOCENE UPPER EOCENE 444.0 453.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 30 43 36.5 DSDP INITIAL REPORTS 19 183 MIDDLE EOCENE 472.0 481.0 NO AGE GIVEN NO AGE GIVEN 43 49 46 DSDP INITIAL REPORTS 19 183 LOWER EOCENE 500.0 505.0 NO AGE GIVEN NO AGE GIVEN 49 53.5 51.25 DSDP INITIAL REPORTS