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 1 2 UPPER PLEISTOCENE 19.5 22.7 NO AGE GIVEN NO AGE GIVEN 0.01 0.7 0.355 DSDP INITIAL REPORTS 1 2 LOWER PLEISTOCENE 57.6 58.8 NO AGE GIVEN NO AGE GIVEN 1.2 1.8 1.5 DSDP INITIAL REPORTS 1 2 UPPER PLIOCENE 66.7 70.2 NO AGE GIVEN NO AGE GIVEN 1.8 3.4 2.6 DSDP INITIAL REPORTS 1 2 LOWER PLIOCENE 101.5 104.1 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 1 2 UPPER MIOCENE 136.0 136.1 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 1 2 CRETACEOUS JURASSIC 136.1 137.9 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 65 192 128.5 DSDP INITIAL REPORTS