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 85 574 QUATERNARY 0.0 4.5 NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS 85 574 QUATERNARY UPPER PLIOCENE 4.5 14.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0 3.4 1.7 DSDP INITIAL REPORTS 85 574 UPPER PLIOCENE LOWER PLIOCENE 14.0 23.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 1.8 5 3.4 DSDP INITIAL REPORTS 85 574 LOWER PLIOCENE 23.5 33.0 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 85 574 LOWER PLIOCENE UPPER MIOCENE 33.0 42.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 3.4 10.5 6.95 DSDP INITIAL REPORTS 85 574 UPPER MIOCENE 42.5 80.0 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 85 574 MIDDLE MIOCENE 80.0 177.5 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS 85 574 MIDDLE MIOCENE LOWER MIOCENE 177.5 182.3 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 10.5 22.5 16.5 DSDP INITIAL REPORTS 85 574 LOWER MIOCENE 182.3 206.5 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 DSDP INITIAL REPORTS