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 60 456 HOLOCENE UPPER PLEISTOCENE 0.5 10.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0 0.7 0.35 DSDP INITIAL REPORTS 60 456 UPPER PLEISTOCENE 10.0 57.5 NO AGE GIVEN NO AGE GIVEN 0.01 0.7 0.355 DSDP INITIAL REPORTS 60 456 LOWER PLEISTOCENE 57.5 114.5 NO AGE GIVEN NO AGE GIVEN 1.2 1.8 1.5 DSDP INITIAL REPORTS