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 31 298 HOLOCENE PLEISTOCENE 0.0 183.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS 31 298 UPPER PLEISTOCENE 183.5 288.0 NO AGE GIVEN NO AGE GIVEN 0.01 0.7 0.355 DSDP INITIAL REPORTS 31 298 UPPER PLEISTOCENE LOWER PLEISTOCENE 297.5 307.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0.01 1.8 0.905 DSDP INITIAL REPORTS 31 298 LOWER PLEISTOCENE 316.5 611.0 NO AGE GIVEN NO AGE GIVEN 1.2 1.8 1.5 DSDP INITIAL REPORTS