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 10 90 UPPER PLEISTOCENE 0.0 72.4 NO AGE GIVEN NO AGE GIVEN 0.01 0.7 0.355 DSDP INITIAL REPORTS 10 90 MIDDLE PLEISTOCENE 72.4 79.0 NO AGE GIVEN NO AGE GIVEN 0.8 1.2 1 DSDP INITIAL REPORTS 10 90 LOWER PLEISTOCENE 130.0 140.0 NO AGE GIVEN NO AGE GIVEN 1.2 1.8 1.5 DSDP INITIAL REPORTS 10 90 LOWER PLIOCENE 188.0 197.0 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 10 90 UPPER MIOCENE 236.0 242.0 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 10 90 MIDDLE MIOCENE 293.0 768.0 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS