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 66 487 UPPER PLEISTOCENE MIDDLE PLEISTOCENE 0.0 39.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0.01 1.2 0.605 DSDP INITIAL REPORTS 66 487 MIDDLE PLEISTOCENE 39.0 58.0 NO AGE GIVEN NO AGE GIVEN 0.8 1.2 1 DSDP INITIAL REPORTS 66 487 MIDDLE PLEISTOCENE LOWER PLEISTOCENE 58.0 105.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0.8 1.8 1.3 DSDP INITIAL REPORTS 66 487 PLIOCENE 115.0 124.5 NO AGE GIVEN NO AGE GIVEN 1.8 5 3.4 DSDP INITIAL REPORTS 66 487 UPPER MIOCENE 124.5 172.0 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS