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 16 163 PLEISTOCENE 0.0 1.0 NO AGE GIVEN NO AGE GIVEN 0.011 1.8 .9055 DSDP INITIAL REPORTS 16 163 UPPER OLIGOCENE 1.0 19.0 NO AGE GIVEN NO AGE GIVEN 22.5 30 26.25 DSDP INITIAL REPORTS 16 163 LOWER OLIGOCENE 19.0 28.0 NO AGE GIVEN NO AGE GIVEN 30 37.5 33.75 DSDP INITIAL REPORTS 16 163 UPPER EOCENE 28.0 46.0 NO AGE GIVEN NO AGE GIVEN 37.5 43 40.25 DSDP INITIAL REPORTS 16 163 MIDDLE EOCENE 46.0 100.0 NO AGE GIVEN NO AGE GIVEN 43 49 46 DSDP INITIAL REPORTS 16 163 MAESTRICHTIAN 141.0 184.5 NO AGE GIVEN NO AGE GIVEN 65 70 67.5 DSDP INITIAL REPORTS 16 163 CAMPANIAN 184.5 276.0 NO AGE GIVEN NO AGE GIVEN 70 78 74 DSDP INITIAL REPORTS