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 41 369 PLEISTOCENE UPPER MIOCENE 0.0 4.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0.011 10.5 5.256 DSDP INITIAL REPORTS 41 369 LOWER PLIOCENE 4.0 13.5 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 41 369 UPPER MIOCENE 13.5 32.5 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 41 369 MIDDLE MIOCENE 32.5 41.0 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS