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 63 470 QUATERNARY 0.0 19.0 NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS 63 470 LOWER QUATERNARY 19.0 23.9 NO AGE GIVEN NO AGE GIVEN 0.8 1.8 1.3 DSDP INITIAL REPORTS 63 470 UPPER PLIOCENE 23.9 47.5 NO AGE GIVEN NO AGE GIVEN 1.8 3.4 2.6 DSDP INITIAL REPORTS 63 470 LOWER PLIOCENE 47.5 66.5 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 63 470 UPPER MIOCENE 66.5 104.5 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 63 470 UPPER MIOCENE MIDDLE MIOCENE 104.5 114.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 5 16 10.5 DSDP INITIAL REPORTS 63 470 MIDDLE MIOCENE 114.0 168.0 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS