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 63 468 UPPER QUATERNARY 0.0 0.2 NO AGE GIVEN NO AGE GIVEN 0 0.8 0.4 DSDP INITIAL REPORTS 63 468 UPPER PLIOCENE 0.2 1.0 NO AGE GIVEN NO AGE GIVEN 1.8 3.4 2.6 DSDP INITIAL REPORTS 63 468 LOWER PLIOCENE 1.0 3.5 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 63 468 PLIOCENE MIDDLE MIOCENE 3.5 13.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 1.8 16 8.9 DSDP INITIAL REPORTS 63 468 MIDDLE MIOCENE 13.0 193.5 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS 63 468 MIDDLE MIOCENE LOWER MIOCENE 203.0 222.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 10.5 22.5 16.5 DSDP INITIAL REPORTS